# Agent Data API (remote · onchaincheck.dev)

Token risk, wallet profiles, OFAC screening, whale trades on 6 chains. x402, USDC per call.

- Trust score: 65/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `onchaincheck.dev`: 65/100 (this document), [markdown](https://verifymcp.io/servers/lx1112-agent-data-api/onchaincheck.md), [page](https://verifymcp.io/servers/lx1112-agent-data-api/onchaincheck)

## Channel facts

- Endpoint: `https://onchaincheck.dev/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.1.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Endpoint Security**: 46/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 72 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS enforcement could not be verified: the plaintext port answered with HTTP 406, which proves neither a plaintext path nor enforcement.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 71/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 9265 tokens (~128/item across 72 items; 72 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 40/100
  - Stability observed for 12 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 72 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 72 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the Agent Data API MCP server?

Agent Data API is a hosted endpoint at https://onchaincheck.dev/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http lx1112-agent-data-api 'https://onchaincheck.dev/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "lx1112-agent-data-api": {
      "url": "https://onchaincheck.dev/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "lx1112-agent-data-api": {
      "type": "http",
      "url": "https://onchaincheck.dev/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.lx1112-agent-data-api]
url = "https://onchaincheck.dev/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "lx1112-agent-data-api": {
      "type": "remote",
      "url": "https://onchaincheck.dev/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add lx1112-agent-data-api --url 'https://onchaincheck.dev/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  lx1112-agent-data-api:
    url: "https://onchaincheck.dev/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "lx1112-agent-data-api": {
      "Transport": "http",
      "Url": "https://onchaincheck.dev/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add lx1112-agent-data-api -t streamable-http -u 'https://onchaincheck.dev/mcp'
```

### Other

```json
{
  "mcpServers": {
    "lx1112-agent-data-api": {
      "type": "http",
      "url": "https://onchaincheck.dev/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-05 (score 65, +1)

- [security] Tool “company_jobs” rewrote its description, which is the text the model reads
- [functional] New tool “company_profile”
- [functional] New tool “jobs_new”
- [functional] New tool “jobs_salary”
- [functional] New tool “jobs_search”

### 2026-11-03 (score 64, +1)

No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-01 (score 63, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-29 (score 62, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-27 (score 61, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-26 (score 60, 0)

- [functional] New tool “deployer_record”
- [functional] New tool “token_verdict”

### 2026-10-25 (score 60, +1)

- [security] Tool “token_risk_check” rewrote its description, which is the text the model reads
- [functional improvement] Stability: unverified → 0.03
- [functional] New tool “token_watchlist”

### 2026-10-24 (score 59)

First indexed and scored.

## MCP tools (72)

### `canada_sales_tax` (~138 tokens)

Canadian sales tax breakdown for an amount in a province or territory: GST, HST, PST, RST or QST with each rate and amount rounded to the cent, plus the total. Rates are looked up for the given date (default today), so historical changes such as Nova Scotia's 2025 HST cut are handled. Costs $0.005 USDC on Base via x402.

Input parameters:

- `amount` (string, required): Pre-tax amount in CAD
- `date` (string): Date the rates apply to, YYYY-MM-DD; defaults to today (UTC)
- `province` (string, required): Two-letter Canadian province or territory code

### `canada_business_days` (~119 tokens)

Number of business days between two dates in a Canadian province or territory, excluding weekends and that province's statutory holidays (with weekend holidays moved to their observed weekday). Counts from the start date up to but not including the end date, and lists the holidays skipped. Costs $0.005 USDC on Base via x402.

Input parameters:

- `from` (string, required): First day counted, YYYY-MM-DD
- `province` (string, required): Two-letter Canadian province or territory code
- `to` (string, required): Day after the last day counted, YYYY-MM-DD

### `canada_statutory_holidays` (~97 tokens)

Statutory (general) holidays for a Canadian province or territory in a given year, using the province's local names, with the actual date and the weekday it is observed when it falls on a weekend. Costs $0.01 USDC on Base via x402.

Input parameters:

- `province` (string, required): Two-letter Canadian province or territory code
- `year` (string, required): Year from 2000 to 2100

### `fx_ecb_rates` (~110 tokens)

European Central Bank daily reference exchange rates for about 30 major currencies, from any base currency, latest or for a past date. Rates update once per working day; the response states which day. Costs $0.005 USDC on Base via x402.

Input parameters:

- `base` (string): ISO 4217 base currency, default USD
- `date` (string): Past date YYYY-MM-DD; latest if omitted
- `symbols` (string): Comma-separated target currencies; all if omitted

### `fx_ecb_convert` (~112 tokens)

Convert an amount between two currencies at the European Central Bank daily reference rate, latest or for a past date, returning the rate used, the result, and the rate date. Costs $0.005 USDC on Base via x402.

Input parameters:

- `amount` (string, required): Amount in the source currency
- `date` (string): Past date YYYY-MM-DD; latest if omitted
- `from` (string, required): ISO 4217 source currency
- `to` (string, required): ISO 4217 target currency

### `token_risk_check` (~186 tokens)

Is this token safe? Rug check for any token on Base, Ethereum, Arbitrum, Optimism, Polygon or Solana: a 0-100 risk score with plain reasons (mint, freeze, blacklist, fee, pause or trading-switch powers, upgradeable code, holder concentration, thin liquidity, a deployer whose earlier tokens lost their liquidity), the facts behind it, and USD price and liquidity. A fingerprint sent back as since returns what changed. Rules-based, not advice. Costs $0.01 USDC on Base via x402.

Input parameters:

- `address` (string, required): Token contract (EVM) or mint (Solana) address
- `chain` (string): Chain the token is on; defaults to solana for base58 addresses, otherwise base
- `since` (string): watch.fingerprint from an earlier call; adds what changed since then

### `token_watchlist` (~208 tokens)

Re-check up to 5 tokens you hold or watch in one call, on Base, Ethereum, Arbitrum, Optimism, Polygon or Solana: each token's 0-100 risk score, level, reason codes, price, liquidity and a fingerprint. Send the fingerprints back as since to get what changed (new risks, owner or authority changes, liquidity or price moves of 10%+) and a short list of alerts. One price for the whole list, made for polling positions on a schedule. Rules-based, not advice. Costs $0.01 USDC on Base via x402.

Input parameters:

- `since` (string): Fingerprints from an earlier call, comma-separated in the same order as tokens (empty for a new token)
- `tokens` (string, required): Up to 5 chain:address pairs, comma-separated (chains: base, eth, arbitrum, optimism, polygon, solana); a bare address defaults to solana for base58, otherwise base

### `token_verdict` (~192 tokens)

Rug Radar verdict for a token on Base, Ethereum, Arbitrum, Optimism, Polygon or Solana: a grade (CLEAN, MID, SKETCHY, RUGGY), a one-liner, a short take and a shareable card, built from real onchain facts: the 0-100 risk score with its reasons and the deployer's record (did their earlier tokens lose liquidity?). Same call shape as quest verdicts: POST tokenAddress with an optional requestKey, echoed back. Rules-based, not financial advice. Costs $0.01 USDC on Base via x402.

Input parameters:

- `chain` (string): Chain; defaults to solana for base58 addresses, otherwise base
- `requestKey` (string): Optional caller-chosen id, echoed back in the response
- `tokenAddress` (string, required): Token contract (EVM) or mint (Solana) address

### `deployer_record` (~180 tokens)

Who launched this token, and what happened to their other tokens? A creator's launch record on Base, Ethereum, Arbitrum, Optimism, Polygon or Solana from our own history of new pools: every token the wallet launched since 2026-10-23 with its risk score at launch and whether its liquidity was gone 24 hours and 7 days later, plus a verdict (repeat-rugger, prior-rug, serial-launcher, clean-so-far, too-new). Pass the deployer wallet or a token address. Not advice. Costs $0.005 USDC on Base via x402.

Input parameters:

- `address` (string, required): The deployer wallet, or a token address (then its deployer is looked up)
- `chain` (string): Chain; defaults to solana for base58 addresses, otherwise base

### `solana_token_snapshot` (~139 tokens)

Rug check and due-diligence snapshot of a Solana SPL or Token-2022 token: a 0-100 risk score with reasons, name, symbol, supply, mint and freeze authority, Token-2022 controls (permanent delegate, transfer fees, transfer hook, pausable), metadata mutability, top-holder concentration split into wallets and program accounts, and USD price, liquidity, volume and pools from Jupiter and DexScreener. Facts only, no buy or sell opinion. Costs $0.01 USDC on Base via x402.

Input parameters:

- `address` (string, required): Token mint address on Solana (base58)

### `solana_wallet` (~112 tokens)

Portfolio and activity of a Solana wallet: SOL and every SPL and Token-2022 balance with USD values from Jupiter, sorted by value, with dust, unpriced and empty token accounts summarized, plus the newest transaction time, transactions in the last 24 hours, and the oldest transaction in the newest 1,000, with a flag when history goes further back. Costs $0.005 USDC on Base via x402.

Input parameters:

- `address` (string, required): Wallet address on Solana (base58)

### `address_sanctions_screen` (~199 tokens)

Is this address sanctioned? Screens a crypto address against the US Treasury OFAC SDN list's published digital currency addresses (ETH, USDC, USDT, XBT, SOL, TRX and others): the listed entity, programs and listing date on a match, or not found as of the list date. Adds whether it is a wallet (EOA) or contract on Base, Ethereum, Arbitrum, Optimism or Polygon, or a wallet or program-derived address on Solana. Not legal advice. Costs $0.005 USDC on Base via x402.

Input parameters:

- `address` (string, required): Address to screen: 0x (EVM), base58 (Solana), or any other currency's address with chain=other
- `chain` (string): Chain for the wallet/contract check; defaults to base for 0x addresses, solana for Solana addresses, otherwise other (list check only)

### `prepayment_safety_check` (~216 tokens)

Is it safe to pay this address? One check before sending or accepting crypto: OFAC SDN sanctions screen, wallet age, EOA or contract, first funder and recent large transfers on Base, Ethereum, Arbitrum, Optimism or Polygon (wallet kind and activity on Solana), plus the token's 0-100 risk score when a token is given. Returns ok, caution or block with plain reasons and each check in full. Rules-based, not legal advice. Costs $0.02 USDC on Base via x402.

Input parameters:

- `address` (string, required): Address you are about to pay or receive from
- `chain` (string): Chain of the payment; defaults to solana for base58 addresses, otherwise base
- `expect` (string): What the address should be: eoa (a wallet), contract, or any (default); a mismatch gives caution
- `token` (string): Token being paid or received (contract or mint on the same chain); adds its risk score

### `prepayment_safety_check_lite` (~192 tokens)

Is it safe to pay this address? The address-only version of /check: OFAC SDN sanctions screen, wallet age, EOA or contract, first funder and recent large transfers on Base, Ethereum, Arbitrum, Optimism or Polygon (wallet kind and activity on Solana), with the funder and counterparties screened too. Returns ok, caution or block with plain reasons. No token score (use /check for that). Rules-based, not legal advice. Costs $0.01 USDC on Base via x402.

Input parameters:

- `address` (string, required): Address you are about to pay or receive from
- `chain` (string): Chain of the payment; defaults to solana for base58 addresses, otherwise base
- `expect` (string): What the address should be: eoa (a wallet), contract, or any (default); a mismatch gives caution

### `company_jobs` (~226 tokens)

Remote or on-site jobs open at a company right now, from its own applicant tracking system's public job board: Greenhouse, Lever, Ashby, Workable, SmartRecruiters, Recruitee, BambooHR, Personio, Teamtailor, or Workday from a careers URL. Give a company name, website or job-board URL, with optional title, location and remote filters. Returns the newest 50 matching jobs with title, department, location, remote flag, salary when published, posting date and apply link, plus total counts. Costs $0.005 USDC on Base via x402.

Input parameters:

- `company` (string, required): Company name (stripe), website (stripe.com) or job-board URL (https://jobs.lever.co/palantir)
- `location` (string): Keep jobs whose location, country or workplace type contains this text (london, remote)
- `remote` (string): true keeps only jobs marked remote
- `title` (string): Keep jobs whose title contains this text; comma-separate alternatives (engineer,developer)

### `jobs_search` (~257 tokens)

Job search: find open jobs (remote, by title, location or pay) across about 20,000 company job boards (Greenhouse, Lever, Ashby, Workable, SmartRecruiters, Recruitee), crawled twice a day: about 470,000 jobs. Filter by title words, company, location, remote, minimum yearly salary and posting age. Returns up to 50 newest matches with company, location, remote flag, salary when published, posting date and link. Costs $0.005 USDC on Base via x402.

Input parameters:

- `company` (string): Company name words (stripe)
- `currency` (string): Currency for minSalary (default USD)
- `limit` (string): Results, 1-50 (default 25)
- `location` (string): Location or country words (berlin, canada)
- `minSalary` (string): Minimum yearly pay, in currency; only jobs that publish pay
- `postedWithinDays` (string): Only jobs posted in the last N days (1-365)
- `remote` (string): true keeps only remote jobs
- `title` (string): Words in the job title; comma-separate alternatives (data engineer,analytics engineer)

### `jobs_new` (~250 tokens)

Job alerts: new job openings since a time, for monitoring (e.g. new remote engineering roles): jobs first seen by a twice-daily crawl of about 20,000 company job boards (Greenhouse, Lever, Ashby, Workable, SmartRecruiters, Recruitee). Same filters as /jobs/search (title, company, location, remote, minimum salary). Returns up to 50 newest, each with when it was first seen, and nextSince for the next poll. Costs $0.01 USDC on Base via x402.

Input parameters:

- `company` (string): Company name words
- `currency` (string): Currency for minSalary (default USD)
- `limit` (string): Results, 1-50 (default 25)
- `location` (string): Location or country words
- `minSalary` (string): Minimum yearly pay, in currency; only jobs that publish pay
- `remote` (string): true keeps only remote jobs
- `since` (string, required): ISO 8601 time or Unix seconds; older than 30 days counts as 30 days ago
- `title` (string): Words in the job title; comma-separate alternatives

### `jobs_salary` (~168 tokens)

Salary for a job title: how much a role pays, from open postings that publish pay, on about 20,000 company job boards crawled twice a day. Optional location, remote and currency. Returns yearly p10/p25/median/p75/p90, the typical posted range, remote vs on-site medians, the five top-paying companies and the posting count. Costs $0.01 USDC on Base via x402.

Input parameters:

- `currency` (string): Currency (USD, EUR...); default the commonest among matches
- `location` (string): Location or country words (london, canada)
- `remote` (string): true uses only remote postings
- `title` (string, required): Words in the job title; comma-separate alternatives (data engineer,analytics engineer)

### `company_profile` (~135 tokens)

Is a company hiring? A company's hiring profile from its public job board (Greenhouse, Lever, Ashby, Workable, SmartRecruiters, Recruitee), crawled twice a day: careers page, open roles, top departments, locations and countries, remote share, pay median, newest jobs, and jobs opened and closed in the last 7 and 30 days from our crawl history. Costs $0.01 USDC on Base via x402.

Input parameters:

- `company` (string, required): Company name, website or careers-page URL (openai, stripe.com, https://jobs.lever.co/palantir)

### `x402_ping` (~67 tokens)

The smallest real x402 paid call: costs $0.001 in USDC and returns ok with the server time and payment network. Useful for checking that an x402 client can sign and settle a payment end to end. Costs $0.001 USDC on Base via x402.

### `base_token_snapshot` (~137 tokens)

Rug check and due-diligence snapshot of an ERC-20 token on Base: a 0-100 risk score with reasons, name, symbol, decimals, supply, owner and whether ownership is renounced, upgradeable-proxy detection, owner-only functions found in the bytecode (mint, pause, blacklist, fee changes), and USD price, liquidity and FDV from the deepest WETH or USDC pool on Uniswap v3 or Aerodrome. Facts only, no buy or sell opinion. Costs $0.01 USDC on Base via x402.

Input parameters:

- `address` (string, required): Token contract address on Base

### `base_wallet_balances` (~92 tokens)

Native ETH balance of a Base wallet plus the balances of up to 20 ERC-20 tokens you list, formatted with each token's symbol and decimals, read live from Base. Costs $0.005 USDC on Base via x402.

Input parameters:

- `address` (string, required): Wallet address on Base
- `tokens` (string): Comma-separated ERC-20 contract addresses on Base, up to 20

### `base_transaction_summary` (~74 tokens)

Human-readable summary of a Base transaction: status, block and time, sender and recipient, ETH value, gas used and fee, method selector, and decoded ERC-20 transfers with token symbols and amounts. Costs $0.005 USDC on Base via x402.

Input parameters:

- `hash` (string, required): Transaction hash on Base

### `base_gas_prices` (~67 tokens)

Current Base gas conditions: block number, base fee, gas price and priority fee in gwei, and the estimated cost in ETH and USD of a native transfer and an ERC-20 transfer (Chainlink ETH/USD). Costs $0.005 USDC on Base via x402.

### `base_contract_info` (~101 tokens)

Identify what lives at a Base address: wallet (EOA, including EIP-7702 delegation) or contract, which token standard it implements (ERC-20, ERC-721, ERC-1155), name and symbol, upgradeable-proxy implementation and admin, smart-wallet proxies, bytecode size, nonce and ETH balance. Costs $0.005 USDC on Base via x402.

Input parameters:

- `address` (string, required): Any address on Base

### `base_erc20_allowance` (~99 tokens)

ERC-20 allowance on Base: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now. Costs $0.005 USDC on Base via x402.

Input parameters:

- `owner` (string, required): Address that granted the approval
- `spender` (string, required): Address allowed to spend
- `token` (string, required): ERC-20 contract on Base

### `base_nft_metadata` (~107 tokens)

Metadata for an ERC-721 or ERC-1155 token on Base: collection name, current owner (ERC-721), token URI, and the metadata JSON fetched and decoded from IPFS, Arweave, HTTPS or an inline data URI, with a browser-loadable image URL. Costs $0.008 USDC on Base via x402.

Input parameters:

- `contract` (string, required): NFT collection contract on Base
- `tokenId` (string, required): Token id as a decimal string

### `base_large_trades` (~193 tokens)

Whale and large-trade tracker for an ERC-20 on Base: every buy and sell in the last N minutes on the token's deepest WETH/USDC pools (Uniswap v3 or Aerodrome), with USD size, side, wallet and transaction for the largest trades, buy/sell volume and net flow, and the wallets that bought or sold the most. Costs $0.02 USDC on Base via x402.

Input parameters:

- `limit` (string): Max trades listed, 1 to 40, default 20
- `minUsd` (string): Only list trades at least this large in USD, default 1000
- `minutes` (string): Look-back window in minutes; 5 to 240, default 60 (capped at 12,000 blocks, about 50 minutes on Arbitrum)
- `token` (string, required): Token contract address on Base

### `base_new_pools` (~156 tokens)

New trading pools created on Base in the last N minutes on Uniswap v4, Uniswap v3 or Aerodrome: both tokens with symbol, name and decimals, fee tier, v4 hooks, whether it pairs with ETH, WETH or USDC, and quote liquidity where readable. Unvetted: many new pools are spam. Costs $0.01 USDC on Base via x402.

Input parameters:

- `limit` (string): Max pools listed, newest first, 1 to 50, default 25
- `minutes` (string): Look-back window in minutes; 5 to 240, default 60 (capped at 12,000 blocks, about 50 minutes on Arbitrum)

### `base_wallet_profile` (~107 tokens)

Who is this Base address? Wallet age (first transfer), first funder, contract or EOA, ETH balance and nonce, the latest transfers in and out (native, ERC-20, NFTs), top counterparties by count, and recent large transfers in USD (ETH, WETH, USDC, USDT), from Alchemy's transfer index. Costs $0.01 USDC on Base via x402.

Input parameters:

- `address` (string, required): Wallet or contract address on Base

### `base_resolve_basename` (~79 tokens)

Resolve a Basename (name.base.eth) to its Base address and profile records (avatar, description, url, Twitter, GitHub). Accepts "jesse", "jesse.base" or "jesse.base.eth". Costs $0.005 USDC on Base via x402.

Input parameters:

- `name` (string, required): Basename

### `eth_token_snapshot` (~133 tokens)

Rug check and due-diligence snapshot of an ERC-20 token on Ethereum: a 0-100 risk score with reasons, name, symbol, decimals, supply, owner and whether ownership is renounced, upgradeable-proxy detection, owner-only functions found in the bytecode (mint, pause, blacklist, fee changes), and USD price, liquidity and FDV from the deepest WETH or USDC pool on Uniswap v3. Facts only, no buy or sell opinion. Costs $0.01 USDC on Base via x402.

Input parameters:

- `address` (string, required): Token contract address on Ethereum

### `eth_wallet_balances` (~92 tokens)

Native ETH balance of a Ethereum wallet plus the balances of up to 20 ERC-20 tokens you list, formatted with each token's symbol and decimals, read live from Ethereum. Costs $0.005 USDC on Base via x402.

Input parameters:

- `address` (string, required): Wallet address on Ethereum
- `tokens` (string): Comma-separated ERC-20 contract addresses on Ethereum, up to 20

### `eth_transaction_summary` (~74 tokens)

Human-readable summary of a Ethereum transaction: status, block and time, sender and recipient, ETH value, gas used and fee, method selector, and decoded ERC-20 transfers with token symbols and amounts. Costs $0.005 USDC on Base via x402.

Input parameters:

- `hash` (string, required): Transaction hash on Ethereum

### `eth_gas_prices` (~67 tokens)

Current Ethereum gas conditions: block number, base fee, gas price and priority fee in gwei, and the estimated cost in ETH and USD of a native transfer and an ERC-20 transfer (Chainlink ETH/USD). Costs $0.005 USDC on Base via x402.

### `eth_contract_info` (~101 tokens)

Identify what lives at a Ethereum address: wallet (EOA, including EIP-7702 delegation) or contract, which token standard it implements (ERC-20, ERC-721, ERC-1155), name and symbol, upgradeable-proxy implementation and admin, smart-wallet proxies, bytecode size, nonce and ETH balance. Costs $0.005 USDC on Base via x402.

Input parameters:

- `address` (string, required): Any address on Ethereum

### `eth_erc20_allowance` (~99 tokens)

ERC-20 allowance on Ethereum: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now. Costs $0.005 USDC on Base via x402.

Input parameters:

- `owner` (string, required): Address that granted the approval
- `spender` (string, required): Address allowed to spend
- `token` (string, required): ERC-20 contract on Ethereum

### `eth_nft_metadata` (~107 tokens)

Metadata for an ERC-721 or ERC-1155 token on Ethereum: collection name, current owner (ERC-721), token URI, and the metadata JSON fetched and decoded from IPFS, Arweave, HTTPS or an inline data URI, with a browser-loadable image URL. Costs $0.008 USDC on Base via x402.

Input parameters:

- `contract` (string, required): NFT collection contract on Ethereum
- `tokenId` (string, required): Token id as a decimal string

### `eth_large_trades` (~189 tokens)

Whale and large-trade tracker for an ERC-20 on Ethereum: every buy and sell in the last N minutes on the token's deepest WETH/USDC pools (Uniswap v3), with USD size, side, wallet and transaction for the largest trades, buy/sell volume and net flow, and the wallets that bought or sold the most. Costs $0.02 USDC on Base via x402.

Input parameters:

- `limit` (string): Max trades listed, 1 to 40, default 20
- `minUsd` (string): Only list trades at least this large in USD, default 1000
- `minutes` (string): Look-back window in minutes; 5 to 240, default 60 (capped at 12,000 blocks, about 50 minutes on Arbitrum)
- `token` (string, required): Token contract address on Ethereum

### `eth_new_pools` (~152 tokens)

New trading pools created on Ethereum in the last N minutes on Uniswap v4, Uniswap v3: both tokens with symbol, name and decimals, fee tier, v4 hooks, whether it pairs with ETH, WETH or USDC, and quote liquidity where readable. Unvetted: many new pools are spam. Costs $0.01 USDC on Base via x402.

Input parameters:

- `limit` (string): Max pools listed, newest first, 1 to 50, default 25
- `minutes` (string): Look-back window in minutes; 5 to 240, default 60 (capped at 12,000 blocks, about 50 minutes on Arbitrum)

### `eth_wallet_profile` (~107 tokens)

Who is this Ethereum address? Wallet age (first transfer), first funder, contract or EOA, ETH balance and nonce, the latest transfers in and out (native, ERC-20, NFTs), top counterparties by count, and recent large transfers in USD (ETH, WETH, USDC, USDT), from Alchemy's transfer index. Costs $0.01 USDC on Base via x402.

Input parameters:

- `address` (string, required): Wallet or contract address on Ethereum

### `eth_resolve_ens` (~104 tokens)

ENS on Ethereum: resolve a name (vitalik.eth) to its address and profile records (avatar, description, url, Twitter, GitHub), or pass an address instead to get its primary ENS name. Uses ENS's universal resolver. Costs $0.005 USDC on Base via x402.

Input parameters:

- `address` (string): Address for a reverse lookup instead of name
- `name` (string): ENS name, e.g. vitalik.eth

### `arbitrum_token_snapshot` (~140 tokens)

Rug check and due-diligence snapshot of an ERC-20 token on Arbitrum One: a 0-100 risk score with reasons, name, symbol, decimals, supply, owner and whether ownership is renounced, upgradeable-proxy detection, owner-only functions found in the bytecode (mint, pause, blacklist, fee changes), and USD price, liquidity and FDV from the deepest WETH or USDC pool on Uniswap v3. Facts only, no buy or sell opinion. Costs $0.01 USDC on Base via x402.

Input parameters:

- `address` (string, required): Token contract address on Arbitrum One

### `arbitrum_wallet_balances` (~105 tokens)

Native ETH balance of a Arbitrum One wallet plus the balances of up to 20 ERC-20 tokens you list, formatted with each token's symbol and decimals, read live from Arbitrum One. Costs $0.005 USDC on Base via x402.

Input parameters:

- `address` (string, required): Wallet address on Arbitrum One
- `tokens` (string): Comma-separated ERC-20 contract addresses on Arbitrum One, up to 20

### `arbitrum_transaction_summary` (~81 tokens)

Human-readable summary of a Arbitrum One transaction: status, block and time, sender and recipient, ETH value, gas used and fee, method selector, and decoded ERC-20 transfers with token symbols and amounts. Costs $0.005 USDC on Base via x402.

Input parameters:

- `hash` (string, required): Transaction hash on Arbitrum One

### `arbitrum_gas_prices` (~71 tokens)

Current Arbitrum One gas conditions: block number, base fee, gas price and priority fee in gwei, and the estimated cost in ETH and USD of a native transfer and an ERC-20 transfer (Chainlink ETH/USD). Costs $0.005 USDC on Base via x402.

### `arbitrum_contract_info` (~108 tokens)

Identify what lives at a Arbitrum One address: wallet (EOA, including EIP-7702 delegation) or contract, which token standard it implements (ERC-20, ERC-721, ERC-1155), name and symbol, upgradeable-proxy implementation and admin, smart-wallet proxies, bytecode size, nonce and ETH balance. Costs $0.005 USDC on Base via x402.

Input parameters:

- `address` (string, required): Any address on Arbitrum One

### `arbitrum_erc20_allowance` (~106 tokens)

ERC-20 allowance on Arbitrum One: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now. Costs $0.005 USDC on Base via x402.

Input parameters:

- `owner` (string, required): Address that granted the approval
- `spender` (string, required): Address allowed to spend
- `token` (string, required): ERC-20 contract on Arbitrum One

### `arbitrum_nft_metadata` (~114 tokens)

Metadata for an ERC-721 or ERC-1155 token on Arbitrum One: collection name, current owner (ERC-721), token URI, and the metadata JSON fetched and decoded from IPFS, Arweave, HTTPS or an inline data URI, with a browser-loadable image URL. Costs $0.008 USDC on Base via x402.

Input parameters:

- `contract` (string, required): NFT collection contract on Arbitrum One
- `tokenId` (string, required): Token id as a decimal string

### `arbitrum_large_trades` (~196 tokens)

Whale and large-trade tracker for an ERC-20 on Arbitrum One: every buy and sell in the last N minutes on the token's deepest WETH/USDC pools (Uniswap v3), with USD size, side, wallet and transaction for the largest trades, buy/sell volume and net flow, and the wallets that bought or sold the most. Costs $0.02 USDC on Base via x402.

Input parameters:

- `limit` (string): Max trades listed, 1 to 40, default 20
- `minUsd` (string): Only list trades at least this large in USD, default 1000
- `minutes` (string): Look-back window in minutes; 5 to 240, default 60 (capped at 12,000 blocks, about 50 minutes on Arbitrum)
- `token` (string, required): Token contract address on Arbitrum One

### `arbitrum_new_pools` (~156 tokens)

New trading pools created on Arbitrum One in the last N minutes on Uniswap v4, Uniswap v3: both tokens with symbol, name and decimals, fee tier, v4 hooks, whether it pairs with ETH, WETH or USDC, and quote liquidity where readable. Unvetted: many new pools are spam. Costs $0.01 USDC on Base via x402.

Input parameters:

- `limit` (string): Max pools listed, newest first, 1 to 50, default 25
- `minutes` (string): Look-back window in minutes; 5 to 240, default 60 (capped at 12,000 blocks, about 50 minutes on Arbitrum)

### `arbitrum_wallet_profile` (~114 tokens)

Who is this Arbitrum One address? Wallet age (first transfer), first funder, contract or EOA, ETH balance and nonce, the latest transfers in and out (native, ERC-20, NFTs), top counterparties by count, and recent large transfers in USD (ETH, WETH, USDC, USDT), from Alchemy's transfer index. Costs $0.01 USDC on Base via x402.

Input parameters:

- `address` (string, required): Wallet or contract address on Arbitrum One

### `optimism_token_snapshot` (~141 tokens)

Rug check and due-diligence snapshot of an ERC-20 token on OP Mainnet: a 0-100 risk score with reasons, name, symbol, decimals, supply, owner and whether ownership is renounced, upgradeable-proxy detection, owner-only functions found in the bytecode (mint, pause, blacklist, fee changes), and USD price, liquidity and FDV from the deepest WETH or USDC pool on Uniswap v3 or Velodrome. Facts only, no buy or sell opinion. Costs $0.01 USDC on Base via x402.

Input parameters:

- `address` (string, required): Token contract address on OP Mainnet

### `optimism_wallet_balances` (~100 tokens)

Native ETH balance of a OP Mainnet wallet plus the balances of up to 20 ERC-20 tokens you list, formatted with each token's symbol and decimals, read live from OP Mainnet. Costs $0.005 USDC on Base via x402.

Input parameters:

- `address` (string, required): Wallet address on OP Mainnet
- `tokens` (string): Comma-separated ERC-20 contract addresses on OP Mainnet, up to 20

### `optimism_transaction_summary` (~78 tokens)

Human-readable summary of a OP Mainnet transaction: status, block and time, sender and recipient, ETH value, gas used and fee, method selector, and decoded ERC-20 transfers with token symbols and amounts. Costs $0.005 USDC on Base via x402.

Input parameters:

- `hash` (string, required): Transaction hash on OP Mainnet

### `optimism_gas_prices` (~69 tokens)

Current OP Mainnet gas conditions: block number, base fee, gas price and priority fee in gwei, and the estimated cost in ETH and USD of a native transfer and an ERC-20 transfer (Chainlink ETH/USD). Costs $0.005 USDC on Base via x402.

### `optimism_contract_info` (~105 tokens)

Identify what lives at a OP Mainnet address: wallet (EOA, including EIP-7702 delegation) or contract, which token standard it implements (ERC-20, ERC-721, ERC-1155), name and symbol, upgradeable-proxy implementation and admin, smart-wallet proxies, bytecode size, nonce and ETH balance. Costs $0.005 USDC on Base via x402.

Input parameters:

- `address` (string, required): Any address on OP Mainnet

### `optimism_erc20_allowance` (~103 tokens)

ERC-20 allowance on OP Mainnet: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now. Costs $0.005 USDC on Base via x402.

Input parameters:

- `owner` (string, required): Address that granted the approval
- `spender` (string, required): Address allowed to spend
- `token` (string, required): ERC-20 contract on OP Mainnet

### `optimism_nft_metadata` (~111 tokens)

Metadata for an ERC-721 or ERC-1155 token on OP Mainnet: collection name, current owner (ERC-721), token URI, and the metadata JSON fetched and decoded from IPFS, Arweave, HTTPS or an inline data URI, with a browser-loadable image URL. Costs $0.008 USDC on Base via x402.

Input parameters:

- `contract` (string, required): NFT collection contract on OP Mainnet
- `tokenId` (string, required): Token id as a decimal string

### `optimism_large_trades` (~197 tokens)

Whale and large-trade tracker for an ERC-20 on OP Mainnet: every buy and sell in the last N minutes on the token's deepest WETH/USDC pools (Uniswap v3 or Velodrome), with USD size, side, wallet and transaction for the largest trades, buy/sell volume and net flow, and the wallets that bought or sold the most. Costs $0.02 USDC on Base via x402.

Input parameters:

- `limit` (string): Max trades listed, 1 to 40, default 20
- `minUsd` (string): Only list trades at least this large in USD, default 1000
- `minutes` (string): Look-back window in minutes; 5 to 240, default 60 (capped at 12,000 blocks, about 50 minutes on Arbitrum)
- `token` (string, required): Token contract address on OP Mainnet

### `optimism_new_pools` (~158 tokens)

New trading pools created on OP Mainnet in the last N minutes on Uniswap v4, Uniswap v3 or Velodrome: both tokens with symbol, name and decimals, fee tier, v4 hooks, whether it pairs with ETH, WETH or USDC, and quote liquidity where readable. Unvetted: many new pools are spam. Costs $0.01 USDC on Base via x402.

Input parameters:

- `limit` (string): Max pools listed, newest first, 1 to 50, default 25
- `minutes` (string): Look-back window in minutes; 5 to 240, default 60 (capped at 12,000 blocks, about 50 minutes on Arbitrum)

### `optimism_wallet_profile` (~111 tokens)

Who is this OP Mainnet address? Wallet age (first transfer), first funder, contract or EOA, ETH balance and nonce, the latest transfers in and out (native, ERC-20, NFTs), top counterparties by count, and recent large transfers in USD (ETH, WETH, USDC, USDT), from Alchemy's transfer index. Costs $0.01 USDC on Base via x402.

Input parameters:

- `address` (string, required): Wallet or contract address on OP Mainnet

### `polygon_token_snapshot` (~137 tokens)

Rug check and due-diligence snapshot of an ERC-20 token on Polygon PoS: a 0-100 risk score with reasons, name, symbol, decimals, supply, owner and whether ownership is renounced, upgradeable-proxy detection, owner-only functions found in the bytecode (mint, pause, blacklist, fee changes), and USD price, liquidity and FDV from the deepest WPOL or USDC pool on Uniswap v3. Facts only, no buy or sell opinion. Costs $0.01 USDC on Base via x402.

Input parameters:

- `address` (string, required): Token contract address on Polygon PoS

### `polygon_wallet_balances` (~100 tokens)

Native POL balance of a Polygon PoS wallet plus the balances of up to 20 ERC-20 tokens you list, formatted with each token's symbol and decimals, read live from Polygon PoS. Costs $0.005 USDC on Base via x402.

Input parameters:

- `address` (string, required): Wallet address on Polygon PoS
- `tokens` (string): Comma-separated ERC-20 contract addresses on Polygon PoS, up to 20

### `polygon_transaction_summary` (~78 tokens)

Human-readable summary of a Polygon PoS transaction: status, block and time, sender and recipient, POL value, gas used and fee, method selector, and decoded ERC-20 transfers with token symbols and amounts. Costs $0.005 USDC on Base via x402.

Input parameters:

- `hash` (string, required): Transaction hash on Polygon PoS

### `polygon_gas_prices` (~69 tokens)

Current Polygon PoS gas conditions: block number, base fee, gas price and priority fee in gwei, and the estimated cost in POL and USD of a native transfer and an ERC-20 transfer (Chainlink POL/USD). Costs $0.005 USDC on Base via x402.

### `polygon_contract_info` (~105 tokens)

Identify what lives at a Polygon PoS address: wallet (EOA, including EIP-7702 delegation) or contract, which token standard it implements (ERC-20, ERC-721, ERC-1155), name and symbol, upgradeable-proxy implementation and admin, smart-wallet proxies, bytecode size, nonce and POL balance. Costs $0.005 USDC on Base via x402.

Input parameters:

- `address` (string, required): Any address on Polygon PoS

### `polygon_erc20_allowance` (~103 tokens)

ERC-20 allowance on Polygon PoS: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now. Costs $0.005 USDC on Base via x402.

Input parameters:

- `owner` (string, required): Address that granted the approval
- `spender` (string, required): Address allowed to spend
- `token` (string, required): ERC-20 contract on Polygon PoS

### `polygon_nft_metadata` (~111 tokens)

Metadata for an ERC-721 or ERC-1155 token on Polygon PoS: collection name, current owner (ERC-721), token URI, and the metadata JSON fetched and decoded from IPFS, Arweave, HTTPS or an inline data URI, with a browser-loadable image URL. Costs $0.008 USDC on Base via x402.

Input parameters:

- `contract` (string, required): NFT collection contract on Polygon PoS
- `tokenId` (string, required): Token id as a decimal string

### `polygon_large_trades` (~193 tokens)

Whale and large-trade tracker for an ERC-20 on Polygon PoS: every buy and sell in the last N minutes on the token's deepest WPOL/USDC pools (Uniswap v3), with USD size, side, wallet and transaction for the largest trades, buy/sell volume and net flow, and the wallets that bought or sold the most. Costs $0.02 USDC on Base via x402.

Input parameters:

- `limit` (string): Max trades listed, 1 to 40, default 20
- `minUsd` (string): Only list trades at least this large in USD, default 1000
- `minutes` (string): Look-back window in minutes; 5 to 240, default 60 (capped at 12,000 blocks, about 50 minutes on Arbitrum)
- `token` (string, required): Token contract address on Polygon PoS

### `polygon_new_pools` (~154 tokens)

New trading pools created on Polygon PoS in the last N minutes on Uniswap v4, Uniswap v3: both tokens with symbol, name and decimals, fee tier, v4 hooks, whether it pairs with POL, WPOL or USDC, and quote liquidity where readable. Unvetted: many new pools are spam. Costs $0.01 USDC on Base via x402.

Input parameters:

- `limit` (string): Max pools listed, newest first, 1 to 50, default 25
- `minutes` (string): Look-back window in minutes; 5 to 240, default 60 (capped at 12,000 blocks, about 50 minutes on Arbitrum)

### `polygon_wallet_profile` (~111 tokens)

Who is this Polygon PoS address? Wallet age (first transfer), first funder, contract or EOA, POL balance and nonce, the latest transfers in and out (native, ERC-20, NFTs), top counterparties by count, and recent large transfers in USD (POL, WPOL, USDC, USDT), from Alchemy's transfer index. Costs $0.01 USDC on Base via x402.

Input parameters:

- `address` (string, required): Wallet or contract address on Polygon PoS

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/lx1112-agent-data-api/onchaincheck#diagnostics

## Score history

- 2026-11-05: 65
- 2026-11-04: 64
- 2026-11-03: 64
- 2026-11-02: 63
- 2026-11-01: 63
- 2026-10-31: 62
- 2026-10-30: 62
- 2026-10-29: 62
- 2026-10-28: 61
- 2026-10-27: 61
- 2026-10-26: 60
- 2026-10-25: 60
- 2026-10-24: 59

## Common questions

### What is the Agent Data API MCP server?

Agent Data API is an MCP server listed in the public MCP registry as io.github.lx1112/agent-data-api. Token risk, wallet profiles, OFAC screening, whale trades on 6 chains. x402, USDC per call. This page covers its hosted endpoint (https://onchaincheck.dev/mcp).

### Is the Agent Data API MCP server safe to use?

Agent Data API scores 65 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Agent Data API MCP server expose?

Agent Data API exposes 72 tools: canada_sales_tax, canada_business_days, canada_statutory_holidays, fx_ecb_rates, fx_ecb_convert, and 67 more. Their descriptions and schemas cost roughly 9,265 tokens of context every time the server is loaded.

### Does the Agent Data API MCP server require authentication?

No. We connected to Agent Data API without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Agent Data API MCP server still maintained?

Agent Data API is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://onchaincheck.dev/mcp
- Website: https://onchaincheck.dev/
- Changelog RSS feed: https://verifymcp.io/servers/lx1112-agent-data-api/onchaincheck.xml
- Changelog JSON feed: https://verifymcp.io/servers/lx1112-agent-data-api/onchaincheck.json
- HTML version of this page: https://verifymcp.io/servers/lx1112-agent-data-api/onchaincheck