ai.firmbrain/x402-services

Agent/wallet reputation score (0-100): a portable on-chain trust signal — activity, holdings, counterparty diversity, and sanctions — with a tier (untrusted/new/emerging/established/trusted). Send { address }. Decide whether to transact with a wallet in the agent economy. [x402 paid tool — price $0.05; POST /api/agent/reputation]

LLM chat completion via x402 - no accounts, no API keys. Fast models (gpt-4o-mini, gemini-2.0-flash, llama-3.3-70b, mistral-small, deepseek-chat). OpenAI-compatible: send { messages:[{role,content}...], model?, maxTokens?, temperature? }. Payable in USDG on Robinhood Chain or USDC anywhere. Caps: 8k chars in / 1024 tokens out. [x402 paid tool — price $0.005; POST /api/ai/chat]

Frontier-model chat completion via x402 (gpt-4o, claude-sonnet-4, gemini-2.5-pro, deepseek-r1, grok-3). OpenAI-compatible messages. Payable in USDG on Robinhood Chain or USDC anywhere. Caps: 6k chars in / 800 tokens out. [x402 paid tool — price $0.03; POST /api/ai/chat-pro]

AI Gateway model list: available LLMs per tier with prices and caps. The FIRST LLM inference gateway payable in USDG on Robinhood Chain (also USDC on Base/Polygon/Arbitrum/Solana). Send {}. [x402 paid tool — price $0.001; POST /api/ai/models]

Technical indicators for a token computed from daily closes: RSI(14), SMA20/50, EMA12/26, MACD, with bullish/bearish signals. Send { coin, days? }. [x402 paid tool — price $0.005; POST /api/analytics/indicators]

OHLCV candles for a DEX pool (open/high/low/close/volume) at minute/hour/day resolution. Send { chain, pool, timeframe?, limit? }. Charting data for any pool. [x402 paid tool — price $0.005; POST /api/analytics/ohlcv]

Point-in-time historical price: what did a token cost at a past date/timestamp? Send { coin, when }. Essential for backtesting, accounting, and audits. [x402 paid tool — price $0.005; POST /api/analytics/price-at]

Shared blackboard: read one key or list all keys+entries. Send { board, token, key? }. [x402 paid tool — price $0.003; POST /api/board/get]

Shared blackboard: set a versioned key on a multi-writer board. Send { board, token, key, value }. [x402 paid tool — price $0.003; POST /api/board/set]

Add/subtract business days (skips weekends + given holidays). Send { start?, addDays, holidays?, timezone? }. [x402 paid tool — price $0.003; POST /api/business-days]

Exact calculator + unit conversion (arbitrary precision). e.g. '3 inch to cm', 'sqrt(2)^10'. Send { expression, precision? }. [x402 paid tool — price $0.003; POST /api/calc]

Upcoming token-unlock calendar: the biggest unlocks across a basket of tokens within N days, ranked by USD value. Send { protocols?, days? }. See which supply shocks are coming and when. [x402 paid tool — price $0.005; POST /api/catalysts/calendar]

On-chain governance activity via Snapshot: active (or recent) proposals ranked by voting power, with title, space, votes, and end time. Send { space?, state?, limit? }. Governance catalysts that can move token prices. [x402 paid tool — price $0.005; POST /api/catalysts/governance]

Find protocols that have tracked token-unlock schedules, by name substring. Send { query }. Use the returned slug with catalysts/unlocks. [x402 paid tool — price $0.005; POST /api/catalysts/search]

Token unlock / vesting schedule for a protocol: next unlock date, token amount, USD value, category and type, plus upcoming events. Send { protocol } (slug, e.g. "aptos", "arbitrum"). Large unlocks are the most reliable supply-shock catalysts — front-run sell pressure. [x402 paid tool — price $0.005; POST /api/catalysts/unlocks]

Entity labeling: is this address an EOA, a (proxy) contract, a known protocol, or flagged as scam — with name and public tags. Send { address }. [x402 paid tool — price $0.05; POST /api/compliance/label]

Address risk score (0-100): OFAC status, interaction with sanctioned addresses, contract verification, and activity, with a risk level and flags. Send { address }. Chainalysis-lite risk in one call. [x402 paid tool — price $0.05; POST /api/compliance/risk]

OFAC sanctions screening: is this address on the US OFAC sanctioned-address list? Send { address }. Every agent moving money legally needs this pre-transaction check. [x402 paid tool — price $0.05; POST /api/compliance/screen]

Tainted-funds tracing: does this wallet's incoming money trace back to a sanctioned address within N hops? Multi-hop fund-flow trace on Base. Send { address, hops? }. Screen incoming payments before accepting them. [x402 paid tool — price $0.05; POST /api/compliance/taint]

Atomic counter: increment-and-return a named counter (collision-free running totals & IDs across agent runs). Send { name, token, by? }. [x402 paid tool — price $0.003; POST /api/counter]

Explain a cron expression: the next N run times in a timezone. Send { expression, count?, timezone? }. [x402 paid tool — price $0.003; POST /api/cron/explain]

Wallet activity summary: recent transactions, top methods called, distinct counterparties, and latest actions for an address on Base. Send { address }. Agents profile what a wallet does. [x402 paid tool — price $0.003; POST /api/crypto/activity]

Full wallet portfolio: native ETH + all ERC-20 token balances for an address on Base, with amounts. Send { address }. Let agents read any wallet's holdings. [x402 paid tool — price $0.003; POST /api/crypto/balances]

Contract decoder: pass a verified 0x contract address to get its function ABI, or a 0x-selector (8 hex) to decode which function it is. Send { input }. Agents understand contracts before calling them. [x402 paid tool — price $0.003; POST /api/crypto/contract]

Convert an amount between any two crypto/fiat assets at live rates. Send { amount, from, to }, e.g. convert 1.5 ETH to USDC. Instant FX for agents pricing on-chain actions. [x402 paid tool — price $0.003; POST /api/crypto/convert]

Resolve an ENS name or Basename to an address, or reverse-resolve a 0x address to its name + avatar. Send { input }. Human-readable identity for agents. [x402 paid tool — price $0.003; POST /api/crypto/ens]

Live Base gas oracle: current gas price plus estimated cost (ETH & USD) for a transfer, swap, or mint. Send {} — no input needed. Agents budget transactions before acting. [x402 paid tool — price $0.003; POST /api/crypto/gas]

Live crypto & token prices in USD. Send tickers or coingecko ids, e.g. { symbols: ["ETH","USDC","BTC"] }. Real-time on-chain pricing for finance and trading agents. [x402 paid tool — price $0.003; POST /api/crypto/price]

Token intelligence: name, symbol, supply, holder count, source-verification, and safety signals for a contract. Send { address }. Agents vet a token before touching it. [x402 paid tool — price $0.003; POST /api/crypto/token]

Transaction status & receipt on Base: confirmations, success/fail, from/to, value, fee, method. Send { hash }. Agents confirm their on-chain actions settled. [x402 paid tool — price $0.003; POST /api/crypto/tx]

Top DeFi yield opportunities across chains from DeFiLlama, filterable by chain/project/min-TVL, ranked by APY. Send { chain?, project?, minTvl?, limit? }. Yield discovery for finance agents. [x402 paid tool — price $0.003; POST /api/crypto/yields]

Date/time math + timezones. op: now | convert | add | diff. Send { op, time?, timezone?, amount?, unit?, to? }. [x402 paid tool — price $0.003; POST /api/datetime]

Dead-man's switch: heartbeat to keep the switch from firing. Send { id, token }. [x402 paid tool — price $0.003; POST /api/deadman/ping]

Dead-man's switch: if you don't ping within intervalSec, we POST your webhook. Detects crashed agents. Send { id, token, url, intervalSec }. [x402 paid tool — price $0.003; POST /api/deadman/register]

Structured deep diff of two JSON values (added/removed/changed by path). Send { a, b }. [x402 paid tool — price $0.003; POST /api/diff]

Create an agent-to-agent conditional-payment agreement: payer, payee, amount, release condition, deadline — returns an id both parties track. Send { token, payer, payee, amountUsdc, condition, deadline? }. Coordination + resolution layer for A2A commerce (registry, not fund custody). [x402 paid tool — price $0.05; POST /api/escrow/create]

List conditional-payment agreements for your token (yours) or a party address (involving that address). Send { token } or { party }. [x402 paid tool — price $0.005; POST /api/escrow/list]

Resolve a conditional-payment agreement: the creator marks 'release' (pay payee) or 'refund' (return to payer); returns a settlement instruction to execute over x402. Send { id, token, outcome, note? }. [x402 paid tool — price $0.05; POST /api/escrow/resolve]

Check the state of a conditional-payment agreement (pending/released/refunded/expired). Send { id }. [x402 paid tool — price $0.005; POST /api/escrow/status]

Live gas prices across major chains (Base, Ethereum, Arbitrum, Optimism, Polygon, BSC) with estimated USD cost of a swap. Send { chains? }. Time and route transactions for the cheapest execution. [x402 paid tool — price $0.005; POST /api/exec/gas]

Best-route swap quote across DEXes (KyberSwap aggregator): expected output, USD in/out, price impact %, gas cost, and the DEXes routed through. Send { chain, tokenIn, tokenOut, amountIn } (amountIn in smallest units). Quote only — never executes. Pre-trade routing for trading agents. [x402 paid tool — price $0.05; POST /api/exec/quote]

Sandwich / MEV risk score for a planned swap, from price impact and trade size, with concrete mitigations (private RPC, tighter slippage, order splitting). Send { chain, tokenIn, tokenOut, amountIn }. Trade without getting sandwiched. [x402 paid tool — price $0.05; POST /api/exec/sandwich]

Recommended max slippage for a planned swap based on live price impact plus a buffer, with a rating. Send { chain, tokenIn, tokenOut, amountIn }. Avoid failed txns and overpaying on slippage. [x402 paid tool — price $0.005; POST /api/exec/slippage]

Extract structured data (title, links, meta, headings, text) from HTML as JSON. [x402 paid tool — price $0.003; POST /api/extract]

Idempotency key: returns firstTime:true only once per key within ttl (dedupe retries/double-sends). Send { key, token, ttlSec? }. [x402 paid tool — price $0.003; POST /api/idempotency]

Webhook inbox: get a disposable URL that captures inbound POSTs for you to poll. Send { token }. [x402 paid tool — price $0.003; POST /api/inbox/create]

Webhook inbox: fetch captured messages newer than a timestamp. Send { id, token, since? }. [x402 paid tool — price $0.003; POST /api/inbox/poll]

Validate data against a JSON Schema (strict). Returns valid + detailed errors. Send { schema, data }. [x402 paid tool — price $0.003; POST /api/jsonschema]

Aave v3 position health: health factor, collateral, debt, liquidation buffer, and a risk verdict for a wallet. Send { address, chain? }. Know your liquidation risk before it hits. [x402 paid tool — price $0.05; POST /api/lending/health]

Liquidation-opportunity scanner: at-risk Morpho Blue borrower positions (health factor < 1) that can be liquidated for a bonus, with borrower, market, debt and collateral in USD. Send { chain?, minDebtUsd?, limit? }. Live liquidatable positions for searcher/liquidator agents. [x402 paid tool — price $0.05; POST /api/lending/liquidations]