# com.market0x/marketplace (remote · www.market0x.com)

Buy, sell and bid on vote-escrow NFTs and .base.eth names. Non-custodial, settles on Seaport.

- Trust score: 73/100 (medium)
- Change this week: +1
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-20

## Components

- remote · `www.market0x.com`: 73/100 (this document), [markdown](https://verifymcp.io/servers/com-market0x-marketplace/api-mcp.md), [page](https://verifymcp.io/servers/com-market0x-marketplace/api-mcp)

## Channel facts

- Endpoint: `https://www.market0x.com/api/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.1.0`

## 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 2026-09-20.

- **Endpoint Security**: 63/100
  - 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 13 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 is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - 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**: 73/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 1493 tokens (~114/item across 13 items; 13 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 69/100
  - Stability check failed: schema churn in the 25 days we've observed: 2 tool removals, 0 breaking changes, 0 auth/transport breaks, 0 additions.
- **Tool Coverage**: 81/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 42% of tool parameters carry a description.
- **Tool Safety**: 75/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - 0 of 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "unsubscribe_notifications" implies "delete" and declares no destructiveHint at all, which the MCP spec reads as destructive by default.
  - An AI judge read all 13 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 com.market0x/marketplace MCP server?

com.market0x/marketplace is a hosted endpoint at https://www.market0x.com/api/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 com-market0x-marketplace 'https://www.market0x.com/api/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-market0x-marketplace": {
      "url": "https://www.market0x.com/api/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-market0x-marketplace": {
      "type": "http",
      "url": "https://www.market0x.com/api/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-market0x-marketplace]
url = "https://www.market0x.com/api/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-market0x-marketplace": {
      "type": "remote",
      "url": "https://www.market0x.com/api/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-market0x-marketplace --url 'https://www.market0x.com/api/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-market0x-marketplace:
    url: "https://www.market0x.com/api/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-market0x-marketplace": {
      "Transport": "http",
      "Url": "https://www.market0x.com/api/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-market0x-marketplace -t streamable-http -u 'https://www.market0x.com/api/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-market0x-marketplace": {
      "type": "http",
      "url": "https://www.market0x.com/api/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.

### 2026-09-19 (score 73, −1)

- [security regression] Stability: 0.77 → fail
- [security regression] A breaking change shipped without a version bump: still 0.1.0
- [security regression] Tool “prepare_finalize” was removed
- [security regression] Tool “search_names” was removed
- [security] Tool “prepare_listing” rewrote its description, which is the text the model reads
- [security] Tool “prepare_offer” rewrote its description, which is the text the model reads
- [functional regression] Tool coverage: 52% → 42%
- [functional improvement] Schema quality: 130 → 114
- [cosmetic] “get_listings” reworded the description of “minDiscountPct”

### 2026-09-17 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 70 to 73. That category is still filling its 30-day observation window: 21 days of observed history at the previous scan, 22 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-15 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-13 (score 72, +1)

No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-11 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-09 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-06 (score 69, +1)

No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-04 (score 68, +1)

No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (13)

### `list_micro_markets` (~25 tokens)

List the markets this marketplace facilitates (asset, chain, currencies, fee).

### `get_listings` (~184 tokens)

Active listings/auctions for a market. Each row carries the ask and the position's underlying contents priced at current market (published formula: /docs#data-sources), plus discountPct (the difference between them). Sorted by discount percentage, descending.

Input parameters:

- `kind` (string)
- `limit` (number)
- `marketId` (string, required): market id, e.g. 'vehydx'
- `minDiscountPct` (number): only return orders at >= this discount %. IGNORED on markets whose asset has no priced underlying, where there is nothing to compare the ask against — the response says so in `note` rather than retur…
- `nameContains` (string): case-insensitive substring match on the listing's label (the name on name markets, e.g. 'alice'; 'veAERO #123' elsewhere)

### `get_listing_details` (~46 tokens)

Full detail for one order including a FRESH live-contents snapshot (principal, claimable rewards, voting/earning power, as_of_block).

Input parameters:

- `orderHash` (string, required)

### `get_recent_trades` (~108 tokens)

Recently settled sales for a market. `amount` is the EXACT settled total (incl. fee) from the on-chain fill where the indexer recorded it, with `settledAt` the block time and `exact: true`; otherwise it falls back to the listed ask with `exact: false` (a decayed Dutch auction settles BELOW its listed amount, so treat inexact rows as an upper bound).

Input parameters:

- `limit` (number)
- `marketId` (string, required)

### `prepare_purchase` (~136 tokens)

Prepare the non-custodial transaction package to BUY a listing (or accept an offer): ordered approvals + Seaport fulfillOrder calldata + a fresh contents snapshot. prepared.summary quotes the CURRENT price (Dutch auctions interpolate, asOf says when); the approval grants approveBaseUnits — slightly above the quote on a decaying order, never above maxTotalBaseUnits — and Seaport charges the exact interpolated amount at fill. On auctions, prepared.cleanup is an optional post-settlement tx that zeroes the residual allowance. The agent's own wallet signs and submits — this never signs or holds keys.

Input parameters:

- `orderHash` (string, required)

### `prepare_offer` (~190 tokens)

Prepare a BID/offer on a position: returns the Seaport order to sign (EIP-712), the currency approval needed, and how to submit it. The agent reads its Seaport counter, signs, and POSTs the signed order — settlement stays on Seaport.

Input parameters:

- `buyer` (string, required): 0x address that will sign and fund the offer
- `currencySymbol` (string, required): one of the market's settlementCurrencies (see list_micro_markets)
- `durationDays` (number)
- `marketId` (string, required)
- `name` (string): name markets only, e.g. 'alice' or 'alice.base.eth' — tokenId is derived
- `offerAmount` (string, required): human amount the seller nets, e.g. '750' — must be positive
- `tokenId` (string): required for token markets (e.g. vehydx)

### `prepare_listing` (~224 tokens)

Prepare a SELL listing or Dutch auction. Verifies the seller OWNS the position and it's transferable (not voted/attached), builds the Seaport order with the Interface fee injected by the server, and returns the one-time NFT approval + EIP-712 typed data to sign. Never signs or holds keys.

Input parameters:

- `ask` (string): listing: price the seller nets — must be positive
- `currencySymbol` (string, required): one of the market's settlementCurrencies (see list_micro_markets)
- `durationDays` (number)
- `endAsk` (string): dutch_auction: floor price (must be below the start)
- `kind` (string, required)
- `marketId` (string, required)
- `name` (string): name markets only, e.g. 'alice' or 'alice.base.eth' — tokenId is derived
- `seller` (string, required)
- `startAsk` (string): dutch_auction: starting (high) price
- `tokenId` (string): required for token markets (e.g. vehydx)

### `prepare_cancel` (~75 tokens)

Prepare the on-chain Seaport cancel transaction for an active order. Only the order's offerer can execute it (Seaport enforces msg.sender == offerer), so the calldata is safe to return. After it confirms, POST { txHash } to the confirm endpoint to update the book.

Input parameters:

- `orderHash` (string, required)

### `get_orders` (~54 tokens)

List orders created by an address (its listings, auctions, offers). Status is reconciled by the background worker — treat as advisory until checked at fill.

Input parameters:

- `offerer` (string, required)
- `status` (string)

### `get_owned_positions` (~46 tokens)

List the positions an address owns in a market, with listability (voted/attached positions can't transfer).

Input parameters:

- `marketId` (string, required)
- `owner` (string, required)

### `subscribe_notifications` (~274 tokens)

Subscribe a wallet to push notifications (order_filled / offer_received / saved_search) via an HMAC-signed webhook — the agent-native alternative to polling. Two-step: call WITHOUT `signature` to get the exact message to sign (EIP-191 personal_sign), then call again WITH the signature. `chainId` is signed over and the signature is verified on THAT chain, so pass the chain the wallet actually signs on (smart-wallet signatures do not validate cross-chain). Each signed message is SINGLE-USE: resending the same body returns 409 replayed_signature — retry with a fresh timestamp and a new signature. The response includes the webhook HMAC secret ONCE (verify x-market0x-signature = hex(HMAC-SHA256(rawBody, secret))).

Input parameters:

- `chainId` (integer, required): chain the wallet signs on; it is part of the signed message
- `channel` (string, required)
- `events` (array, required)
- `savedSearch` (object)
- `signature` (string): EIP-191 signature of the canonical message; omit to receive the message to sign
- `timestamp` (number, required): unix seconds; must be within 10 minutes of now
- `wallet` (string, required)
- `webhookUrl` (string): https URL; required for the webhook channel

### `list_subscriptions` (~31 tokens)

List a wallet's notification subscriptions (webhook URLs redacted to origin).

Input parameters:

- `wallet` (string, required)

### `unsubscribe_notifications` (~100 tokens)

Delete a notification subscription. Two-step like subscribe_notifications: call without `signature` to get the message to sign. `chainId` is signed over and verified on that chain. Signed messages are single-use.

Input parameters:

- `chainId` (integer, required): chain the wallet signs on; it is part of the signed message
- `signature` (string)
- `subscriptionId` (string, required)
- `timestamp` (number, required)
- `wallet` (string, required)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-market0x-marketplace/api-mcp#diagnostics

## Score history

- 2026-09-20: 73
- 2026-09-19: 73
- 2026-09-18: 74
- 2026-09-17: 74
- 2026-09-16: 73
- 2026-09-15: 73
- 2026-09-14: 72
- 2026-09-13: 72
- 2026-09-12: 71
- 2026-09-11: 71
- 2026-09-10: 70
- 2026-09-09: 70
- 2026-09-08: 69
- 2026-09-07: 69
- 2026-09-06: 69
- 2026-09-05: 68
- 2026-09-04: 68
- 2026-09-03: 67
- 2026-09-02: 67
- 2026-09-01: 66
- 2026-08-31: 66
- 2026-08-30: 65
- 2026-08-29: 65
- 2026-08-28: 64
- 2026-08-27: 64
- 2026-08-26: 63

## Common questions

### What is the com.market0x/marketplace MCP server?

com.market0x/marketplace is an MCP server listed in the public MCP registry as com.market0x/marketplace. Buy, sell and bid on vote-escrow NFTs and .base.eth names. Non-custodial, settles on Seaport. This page covers its hosted endpoint (https://www.market0x.com/api/mcp).

### Is the com.market0x/marketplace MCP server safe to use?

com.market0x/marketplace scores 73 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 com.market0x/marketplace MCP server expose?

com.market0x/marketplace exposes 13 tools: list_micro_markets, get_listings, get_listing_details, get_recent_trades, prepare_purchase, and 8 more. Their descriptions and schemas cost roughly 1,493 tokens of context every time the server is loaded.

### Does the com.market0x/marketplace MCP server require authentication?

No. We connected to com.market0x/marketplace without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the com.market0x/marketplace MCP server still maintained?

com.market0x/marketplace is still listed as active in the MCP registry. We last reached this channel on 20 September 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://www.market0x.com/api/mcp
- Repository: https://github.com/Carbonmark/market0x
- Website: https://www.market0x.com/agents
- Changelog RSS feed: https://verifymcp.io/servers/com-market0x-marketplace/api-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-market0x-marketplace/api-mcp.json
- HTML version of this page: https://verifymcp.io/servers/com-market0x-marketplace/api-mcp