# x402 List API

**Canonical:** https://apis.io/providers/x402-list-api/  
**APIs profiled:** 1

An open, machine-readable, live-monitored directory of services that accept x402 protocol payments (HTTP 402 Payment Required). Self-described as agent-first, it exposes service listings, uptime metrics, pricing, facilitator settlement data, and rankings as JSON for autonomous agents, aggregators, and integrations.

## Kin Score — 56.6 / 100 (strong)

Scored 2026-09-02 under rubric 0.18.0.

| Facet | Score |
|---|---|
| Discoverability | 87.0 |
| Contract Quality | 33.3 |
| Governance | 50.0 |
| Contract Governance | 50.0 |
| Operational Transparency | 68.4 |
| Developer Ergonomics | 58.9 |
| Commercial Clarity | 52.6 |
| Access Clarity | 52.6 |

Regulatory layer — **Payments**: 48.4 (matched via tags).

## Agent readiness — 30.3 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | yes |
| Consent Identity | yes |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## APIs (1)

- **x402 List API** — Public REST API (OpenAPI 3.1) providing access to the x402 services directory, uptime, pricing, facilitator volumes, networks, stats, rankings, and change events. Free reads (ra...

## MCP servers (2)

- **x402 List API MCP Server**
- **x402 List API MCP Server** — x402 List ships a first-party MCP server in both shapes: a hosted Streamable HTTP endpoint at https://mcp.x402-list.com/mcp that answers tools/list anonymously, and a local stdi...

## Security (3)

- **X402 List Api Authentication** — 0 schemes
- **X402 List Api Domain Security** — TLSv1.3 · HSTS · DMARC
- **X402 List Api Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **X402 List Api Plans Pricing**

## Tags

x402, crypto, 402, agentic-payments, API directory, registry, AI agents, blockchain, developer tools, uptime monitoring

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/x402-list-api/). Scores are computed from the provider's own public artifacts under a published rubric.