x402 List API
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.
x402 List API publishes 11 API contracts indexed on the APIs.io network, including Assess API, Changes API, Checks API, and 8 more. Tagged areas include x402, Cryptocurrency, 402, Agentic Payments, and API Directory.
The x402 List API catalog on APIs.io includes 1 Spectral governance ruleset.
x402 List API’s developer surface includes engineering blog, support, and 21 more developer resources.
Kin Score
Standards implemented 1
Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.
APIs 11
Individual APIs this provider publishes, each with its own machine-readable definition.
x402 List API Assess API
On-demand paid AI assessment of a service shortlist (x402)
x402 List API Changes API
Change events detected on the live x402 wire: payTo rotations, price moves, and schema changes
x402 List API Checks API
Access monitoring check logs - the raw heartbeat of the x402 ecosystem
x402 List API Facilitators API
Independently on-chain-verified USDC settlement volume per x402 facilitator (multi-chain)
x402 List API Recommender API
Rank the best x402 service(s) for a need (the public HTTP recommender)
x402 List API Reference API
Reference data: supported networks, categories, and service tags
x402 List API Services API
Browse and query x402 services, their endpoints, uptime, and pricing
x402 List API Stats API
Aggregate statistics about the x402 ecosystem
x402 List API Status API
Get a quick health overview of all monitored services
x402 List API Submissions API
Submit new x402 services or facilitators for review and listing
x402 List API Suggestions API
Post paid suggestions for the directory (feedback in x402)
Scroll for all 11
MCP Servers 1
Model Context Protocol servers that expose these APIs to AI agents.
x402 List API MCP Server
MCP SERVERPricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
X402 List Api Rate Limits
RATE LIMITSSpectral Rules 1
Spectral governance rulesets for linting and validating these APIs.
x402 List API — spectral rules
SPECTRALOpenAPI Overlays 1
Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.
X402 List Api Openapi Overlay
GENERATEDSecurity Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Agent Surfaces 4
MCP servers, agent skills, and machine-readable catalogs
Build 2
SDKs, sample code, and the tooling you integrate with
Access & Security 4
Authentication, authorization, and security posture
Operate 2
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 4
The organization behind the API
Other 4
Properties that don't map to a standard resource type
Source (apis.yml)
Work with this as data
Every provider here is available over the APIs.io API and to AI agents over MCP.