# PayAPI Market (remote · payapi.market)

Search settlement-verified x402 APIs. Discovery is free. Agents pay the provider in USDC on Base.

- Trust score: 73/100 (medium)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-20

## Components

- remote · `payapi.market`: 73/100 (this document), [markdown](https://verifymcp.io/servers/market-payapi-marketplace/payapi.md), [page](https://verifymcp.io/servers/market-payapi-marketplace/payapi)

## Channel facts

- Endpoint: `https://payapi.market/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.1`

## 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 3 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**: 68/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 553 tokens (~184/item across 3 items; 3 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 70/100
  - Stability observed for 21 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 86/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 57% 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 3 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### How do I install the PayAPI Market MCP server?

PayAPI Market is a hosted endpoint at https://payapi.market/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 market-payapi-marketplace 'https://payapi.market/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "market-payapi-marketplace": {
      "url": "https://payapi.market/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "market-payapi-marketplace": {
      "type": "http",
      "url": "https://payapi.market/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.market-payapi-marketplace]
url = "https://payapi.market/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "market-payapi-marketplace": {
      "type": "remote",
      "url": "https://payapi.market/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add market-payapi-marketplace --url 'https://payapi.market/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  market-payapi-marketplace:
    url: "https://payapi.market/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "market-payapi-marketplace": {
      "Transport": "http",
      "Url": "https://payapi.market/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add market-payapi-marketplace -t streamable-http -u 'https://payapi.market/mcp'
```

### Other

```json
{
  "mcpServers": {
    "market-payapi-marketplace": {
      "type": "http",
      "url": "https://payapi.market/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.

### 2026-09-20 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 67 to 70. That category is still filling its 30-day observation window: 20 days of observed history at the previous scan, 21 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-18 (score 72, +1)

No change was recorded against any check on this day. Stability & Change Management went from 60 to 63. That category is still filling its 30-day observation window: 18 days of observed history at the previous scan, 19 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-16 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-14 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 47 to 50. That category is still filling its 30-day observation window: 14 days of observed history at the previous scan, 15 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-12 (score 69, +1)

No change was recorded against any check on this day. Stability & Change Management went from 40 to 43. That category is still filling its 30-day observation window: 12 days of observed history at the previous scan, 13 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-10 (score 68, +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.

### 2026-09-07 (score 67, +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.

### 2026-09-05 (score 66, +1)

No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (3)

### `search_apis` (~98 tokens)

Search the PayAPI Market catalogue

Free-text search across the live catalogue. Matches listing name, description, category and provider name. Returns settlement-verified listings only unless verified_only is false. Free and read-only; spends nothing.

Input parameters:

- `limit` (integer)
- `query` (string, required): What you are looking for, e.g. "uk property" or "sanctions screening".
- `verified_only` (boolean): Restrict to settlement-verified listings. Default true.

### `list_apis` (~82 tokens)

List the PayAPI Market catalogue

Browse the live catalogue, optionally filtered to one category. Omit category for everything. Returns settlement-verified listings only unless verified_only is false. Free and read-only; spends nothing.

Input parameters:

- `category` (string): Exact category name. Call with no category first to see the valid values.
- `limit` (integer)
- `verified_only` (boolean)

### `get_api` (~165 tokens)

Get one PayAPI Market listing

Fetch a single live listing by its id or slug, including base_url, price range, network and verification state. Also returns a reliability object: score (0 to 100 or null), band (strong, established, thin, caution or unscored) and computed_at. Reliability is a running score from paid verifications, health history and payTo integrity, not a star rating and not a guarantee; unscored means it has not been computed for that listing yet. Method: https://payapi.market/how-an-agent-finds-payapi. Returns the listing whether or not it is verified, and reports payment_verified honestly. Free and read-only; spends nothing.

Input parameters:

- `id` (string, required): Listing uuid or slug, as returned by search_apis or list_apis.

## Diagnostics

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

## Score history

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

## Common questions

### What is the PayAPI Market MCP server?

PayAPI Market is an MCP server listed in the public MCP registry as market.payapi/marketplace. Search settlement-verified x402 APIs. Discovery is free. Agents pay the provider in USDC on Base. This page covers its hosted endpoint (https://payapi.market/mcp).

### Is the PayAPI Market MCP server safe to use?

PayAPI Market 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 PayAPI Market MCP server expose?

PayAPI Market exposes 3 tools: search_apis, list_apis, get_api. Their descriptions and schemas cost roughly 345 tokens of context every time the server is loaded.

### Does the PayAPI Market MCP server require authentication?

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

### Is the PayAPI Market MCP server still maintained?

PayAPI Market 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://payapi.market/mcp
- Website: https://payapi.market/
- Changelog RSS feed: https://verifymcp.io/servers/market-payapi-marketplace/payapi.xml
- Changelog JSON feed: https://verifymcp.io/servers/market-payapi-marketplace/payapi.json
- HTML version of this page: https://verifymcp.io/servers/market-payapi-marketplace/payapi