x402 List API

Q: Does x402 List API have an API?

Yes. APIs.io lists 11 APIs from x402 List API, including x402 List API Assess API, x402 List API Changes API and x402 List API Checks API, and 8 more.

Q: Is there an OpenAPI specification for the x402 List API?

Yes. APIs.io indexes 11 OpenAPI specifications for x402 List API, each linked for download from this page.

Q: How do I authenticate with the x402 List API?

x402 List API uses bearer-token authentication (0 schemes). The details are profiled on APIs.io as X402 List Api Authentication.

Q: How much does the x402 List API cost?

x402 List API publishes its prices; its Read API access plan is No authentication required for read access. as of 2026-10-28. APIs.io lists 6 pricing plans for x402 List API, with each plan's price, limits and inclusions under Pricing on this page.

Q: Does x402 List API have an MCP server?

Yes. APIs.io lists 1 MCP server for x402 List API.

Q: Is the x402 List API ready for AI agents?

x402 List API has a Kin Score of 59.9 out of 100 (strong) and an Agent Readiness score of 38.1 (agent-ready), scored by API Evangelist on 2026-11-06.

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.

🌐 Visit website 📡 Profile data on GitHub

59.9/100 strong ▬ flat Agent 38/100 agent ready Front door AI 4/6 moderate Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumOpen⚡ Free to try

Agents Publishes an API Onboarding Descriptor (AOD 0.1)

1 published contract 1 MCP Servers 3 Agent Skills

x402 Cryptocurrency402Agentic Payments API Directory Registry AI Agents Blockchain Developer Tools Uptime Monitoring

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 59.9/100 · strong

Contract Quality 10.6 / 19

Developer Ergonomics 8.8 / 15

Access Clarity 10.7 / 15

Operational Transparency 6.7 / 10

Contract Governance 1.4 / 9

Discoverability 6.4 / 8

Regulatory Posture 4.2 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 38/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 3 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 0 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Payments regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

5 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 56.5 — up to +10.9 composite points
Contract Governance scores 15.9 — up to +10.1 composite points
Developer Ergonomics scores 58.9 — up to +8.2 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/x402-list-api/apis.yml: open an issue on github.com/api-evangelist/x402-list-api to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
x402 Micropayments & Agentic Pay-per-Call	undeclared	-	1	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 2

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OpenAPI

measured — observed by APIs.io (published)

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 SERVER

Agent Skills 3

Packaged agent skills for driving this provider's APIs from an AI assistant.

compare-x402-settlement-rails

AGENT SKILL

list-a-service-in-the-x402-directory

AGENT SKILL

pick-and-verify-an-x402-service

AGENT SKILL

x402 List API pricing

Prices published by x402 List API, read 2026-10-28 from x402-list.com/api.

Plan	Price
Read API access	No authentication required for read access. Includes: All endpoints return JSON
MCP paid tool x402_assess_services	$0.25 USDC on Base
Service submission from free compute host	$1 USDC Includes: place in human review queue
Paid resubmission after rejection (<14 days)	$0.50 USDC
Resubmission from free compute host (stacked)	a single $1.50 payment
Paid suggestion box	$0.10 USDC on Base Includes: new features and feedback on the directory

Plan details, limits and sources →

Rate limits

Request rate: 200 requests per minute
Free daily read quota (metering): 2000 get requests per day

Rate-limit details →

Billed by: submission · FinOps profile →

Pricing Plans 1

Published pricing tiers and plan structures.

X402 List Api Plans Pricing

6 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

X402 List Api Rate Limits

2 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

x402 List API

SLA

FinOps 1

Cost, billing, and metering signals for API financial operations.

X402 List Api Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

x402 List API — spectral rules

5 rules · 3 errors 2 warnings

SPECTRAL

OpenAPI 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

10 actions · update · x402-list-api-openapi.json

GENERATED

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

X402 List Api Authentication

0 schemes

SECURITY

X402 List Api Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

X402 List Api Vulnerability Disclosure

security.txt · contact published

SECURITY

Resources

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

MCPServer

MCPServer

AgentSkill

WellKnown

Build 2

SDKs, sample code, and the tooling you integrate with

Packages

Packages

GitHubRepository

GitHubRepository

Access & Security 4

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

SecurityTxt

SecurityTxt

Security

Security

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 4

The organization behind the API

Blog

BlogRSS

Website

Blog

Other 4

Properties that don't map to a standard resource type

Overlay

APICatalog

ContentSignal

APIsJSON

Source (apis.yml)

name: x402 List API
description: 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.
deliveryModel:
  model: saas
  license_evidence:
    not_product:
    - mcccsm/x402-list-mcp
  open_source: unknown
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: low
  source:
  - openapi
  - pricing
  - repository-not-product
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: freemium
  onboarding: open
  trial: false
  try_now: true
  public: true
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Open access
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  generated: '2026-11-06'
  method: derived
image: https://x402-list.com/og-image.png
url: https://raw.githubusercontent.com/api-evangelist/x402-list-api/refs/heads/main/apis.yml
created: '2026-09-02'
modified: '2026-10-06'
specificationVersion: '0.21'
tags:
- x402
- Cryptocurrency
- 402
- Agentic Payments
- API Directory
- Registry
- AI Agents
- Blockchain
- Developer Tools
- Uptime Monitoring
tags_raw:
- x402
- crypto
- 402
- agentic-payments
- API directory
- registry
- AI agents
- blockchain
- developer tools
- uptime monitoring
apis:
- aid: x402-list-api:x402-list-api-assess-api
  name: x402 List API Assess API
  description: On-demand paid AI assessment of a service shortlist (x402)
  humanURL: https://x402-list.com/api
  baseURL: https://x402-list.com/api/v1
  tags:
  - Assess
  properties:
  - type: OpenAPI
    url: openapi/x402-list-api-assess-api-openapi.yml
  - type: Documentation
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: https://x402-list.com/llms.txt
  - type: LLMsTxt
    url: https://x402-list.com/llms-full.txt
  - type: DeveloperPortal
    url: https://x402-list.com/api
  - type: APIReference
    url: https://x402-list.com/api
  - type: GettingStarted
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: llms/x402-list-api-llms.txt
  - type: ToolCrosswalk
    url: mcp/x402-list-api-tool-crosswalk.yml
  - type: Authentication
    url: authentication/x402-list-api-authentication.yml
  - type: ErrorCatalog
    url: errors/x402-list-api-problem-types.yml
  - type: RateLimits
    url: rate-limits/x402-list-api-rate-limits.yml
  - type: Plans
    url: plans/x402-list-api-plans-pricing.yml
  - type: Pricing
    url: https://x402-list.com/api
  - type: Conventions
    url: conventions/x402-list-api-conventions.yml
  - type: DataModel
    url: data-model/x402-list-api-data-model.yml
  - type: Lifecycle
    url: lifecycle/x402-list-api-lifecycle.yml
  - type: StatusPage
    url: https://x402-list.com/status
  - type: ChangeLog
    url: changelog/x402-list-api-changelog.yml
  - type: Conformance
    url: conformance/x402-list-api-conformance.yml
  - type: SpectralRules
    url: rules/x402-list-api-spectral.yaml
- aid: x402-list-api:x402-list-api-changes-api
  name: x402 List API Changes API
  description: 'Change events detected on the live x402 wire: payTo rotations, price moves, and schema changes'
  humanURL: https://x402-list.com/api
  baseURL: https://x402-list.com/api/v1
  tags:
  - Changes
  properties:
  - type: OpenAPI
    url: openapi/x402-list-api-changes-api-openapi.yml
  - type: Documentation
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: https://x402-list.com/llms.txt
  - type: LLMsTxt
    url: https://x402-list.com/llms-full.txt
  - type: DeveloperPortal
    url: https://x402-list.com/api
  - type: APIReference
    url: https://x402-list.com/api
  - type: GettingStarted
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: llms/x402-list-api-llms.txt
  - type: ToolCrosswalk
    url: mcp/x402-list-api-tool-crosswalk.yml
  - type: Authentication
    url: authentication/x402-list-api-authentication.yml
  - type: ErrorCatalog
    url: errors/x402-list-api-problem-types.yml
  - type: RateLimits
    url: rate-limits/x402-list-api-rate-limits.yml
  - type: Plans
    url: plans/x402-list-api-plans-pricing.yml
  - type: Pricing
    url: https://x402-list.com/api
  - type: Conventions
    url: conventions/x402-list-api-conventions.yml
  - type: DataModel
    url: data-model/x402-list-api-data-model.yml
  - type: Lifecycle
    url: lifecycle/x402-list-api-lifecycle.yml
  - type: StatusPage
    url: https://x402-list.com/status
  - type: ChangeLog
    url: changelog/x402-list-api-changelog.yml
  - type: Conformance
    url: conformance/x402-list-api-conformance.yml
  - type: SpectralRules
    url: rules/x402-list-api-spectral.yaml
- aid: x402-list-api:x402-list-api-checks-api
  name: x402 List API Checks API
  description: Access monitoring check logs - the raw heartbeat of the x402 ecosystem
  humanURL: https://x402-list.com/api
  baseURL: https://x402-list.com/api/v1
  tags:
  - Checks
  properties:
  - type: OpenAPI
    url: openapi/x402-list-api-checks-api-openapi.yml
  - type: Documentation
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: https://x402-list.com/llms.txt
  - type: LLMsTxt
    url: https://x402-list.com/llms-full.txt
  - type: DeveloperPortal
    url: https://x402-list.com/api
  - type: APIReference
    url: https://x402-list.com/api
  - type: GettingStarted
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: llms/x402-list-api-llms.txt
  - type: ToolCrosswalk
    url: mcp/x402-list-api-tool-crosswalk.yml
  - type: Authentication
    url: authentication/x402-list-api-authentication.yml
  - type: ErrorCatalog
    url: errors/x402-list-api-problem-types.yml
  - type: RateLimits
    url: rate-limits/x402-list-api-rate-limits.yml
  - type: Plans
    url: plans/x402-list-api-plans-pricing.yml
  - type: Pricing
    url: https://x402-list.com/api
  - type: Conventions
    url: conventions/x402-list-api-conventions.yml
  - type: DataModel
    url: data-model/x402-list-api-data-model.yml
  - type: Lifecycle
    url: lifecycle/x402-list-api-lifecycle.yml
  - type: StatusPage
    url: https://x402-list.com/status
  - type: ChangeLog
    url: changelog/x402-list-api-changelog.yml
  - type: Conformance
    url: conformance/x402-list-api-conformance.yml
  - type: SpectralRules
    url: rules/x402-list-api-spectral.yaml
- aid: x402-list-api:x402-list-api-facilitators-api
  name: x402 List API Facilitators API
  description: Independently on-chain-verified USDC settlement volume per x402 facilitator (multi-chain)
  humanURL: https://x402-list.com/api
  baseURL: https://x402-list.com/api/v1
  tags:
  - Facilitators
  properties:
  - type: OpenAPI
    url: openapi/x402-list-api-facilitators-api-openapi.yml
  - type: Documentation
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: https://x402-list.com/llms.txt
  - type: LLMsTxt
    url: https://x402-list.com/llms-full.txt
  - type: DeveloperPortal
    url: https://x402-list.com/api
  - type: APIReference
    url: https://x402-list.com/api
  - type: GettingStarted
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: llms/x402-list-api-llms.txt
  - type: ToolCrosswalk
    url: mcp/x402-list-api-tool-crosswalk.yml
  - type: Authentication
    url: authentication/x402-list-api-authentication.yml
  - type: ErrorCatalog
    url: errors/x402-list-api-problem-types.yml
  - type: RateLimits
    url: rate-limits/x402-list-api-rate-limits.yml
  - type: Plans
    url: plans/x402-list-api-plans-pricing.yml
  - type: Pricing
    url: https://x402-list.com/api
  - type: Conventions
    url: conventions/x402-list-api-conventions.yml
  - type: DataModel
    url: data-model/x402-list-api-data-model.yml
  - type: Lifecycle
    url: lifecycle/x402-list-api-lifecycle.yml
  - type: StatusPage
    url: https://x402-list.com/status
  - type: ChangeLog
    url: changelog/x402-list-api-changelog.yml
  - type: Conformance
    url: conformance/x402-list-api-conformance.yml
  - type: SpectralRules
    url: rules/x402-list-api-spectral.yaml
- aid: x402-list-api:x402-list-api-recommender-api
  name: x402 List API Recommender API
  description: Rank the best x402 service(s) for a need (the public HTTP recommender)
  humanURL: https://x402-list.com/api
  baseURL: https://x402-list.com/api/v1
  tags:
  - Recommender
  properties:
  - type: OpenAPI
    url: openapi/x402-list-api-recommender-api-openapi.yml
  - type: Documentation
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: https://x402-list.com/llms.txt
  - type: LLMsTxt
    url: https://x402-list.com/llms-full.txt
  - type: DeveloperPortal
    url: https://x402-list.com/api
  - type: APIReference
    url: https://x402-list.com/api
  - type: GettingStarted
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: llms/x402-list-api-llms.txt
  - type: ToolCrosswalk
    url: mcp/x402-list-api-tool-crosswalk.yml
  - type: Authentication
    url: authentication/x402-list-api-authentication.yml
  - type: ErrorCatalog
    url: errors/x402-list-api-problem-types.yml
  - type: RateLimits
    url: rate-limits/x402-list-api-rate-limits.yml
  - type: Plans
    url: plans/x402-list-api-plans-pricing.yml
  - type: Pricing
    url: https://x402-list.com/api
  - type: Conventions
    url: conventions/x402-list-api-conventions.yml
  - type: DataModel
    url: data-model/x402-list-api-data-model.yml
  - type: Lifecycle
    url: lifecycle/x402-list-api-lifecycle.yml
  - type: StatusPage
    url: https://x402-list.com/status
  - type: ChangeLog
    url: changelog/x402-list-api-changelog.yml
  - type: Conformance
    url: conformance/x402-list-api-conformance.yml
  - type: SpectralRules
    url: rules/x402-list-api-spectral.yaml
- aid: x402-list-api:x402-list-api-reference-api
  name: x402 List API Reference API
  description: 'Reference data: supported networks, categories, and service tags'
  humanURL: https://x402-list.com/api
  baseURL: https://x402-list.com/api/v1
  tags:
  - Reference
  properties:
  - type: OpenAPI
    url: openapi/x402-list-api-reference-api-openapi.yml
  - type: Documentation
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: https://x402-list.com/llms.txt
  - type: LLMsTxt
    url: https://x402-list.com/llms-full.txt
  - type: DeveloperPortal
    url: https://x402-list.com/api
  - type: APIReference
    url: https://x402-list.com/api
  - type: GettingStarted
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: llms/x402-list-api-llms.txt
  - type: ToolCrosswalk
    url: mcp/x402-list-api-tool-crosswalk.yml
  - type: Authentication
    url: authentication/x402-list-api-authentication.yml
  - type: ErrorCatalog
    url: errors/x402-list-api-problem-types.yml
  - type: RateLimits
    url: rate-limits/x402-list-api-rate-limits.yml
  - type: Plans
    url: plans/x402-list-api-plans-pricing.yml
  - type: Pricing
    url: https://x402-list.com/api
  - type: Conventions
    url: conventions/x402-list-api-conventions.yml
  - type: DataModel
    url: data-model/x402-list-api-data-model.yml
  - type: Lifecycle
    url: lifecycle/x402-list-api-lifecycle.yml
  - type: StatusPage
    url: https://x402-list.com/status
  - type: ChangeLog
    url: changelog/x402-list-api-changelog.yml
  - type: Conformance
    url: conformance/x402-list-api-conformance.yml
  - type: SpectralRules
    url: rules/x402-list-api-spectral.yaml
- aid: x402-list-api:x402-list-api-services-api
  name: x402 List API Services API
  description: Browse and query x402 services, their endpoints, uptime, and pricing
  humanURL: https://x402-list.com/api
  baseURL: https://x402-list.com/api/v1
  tags:
  - Services
  properties:
  - type: OpenAPI
    url: openapi/x402-list-api-services-api-openapi.yml
  - type: Documentation
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: https://x402-list.com/llms.txt
  - type: LLMsTxt
    url: https://x402-list.com/llms-full.txt
  - type: DeveloperPortal
    url: https://x402-list.com/api
  - type: APIReference
    url: https://x402-list.com/api
  - type: GettingStarted
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: llms/x402-list-api-llms.txt
  - type: ToolCrosswalk
    url: mcp/x402-list-api-tool-crosswalk.yml
  - type: Authentication
    url: authentication/x402-list-api-authentication.yml
  - type: ErrorCatalog
    url: errors/x402-list-api-problem-types.yml
  - type: RateLimits
    url: rate-limits/x402-list-api-rate-limits.yml
  - type: Plans
    url: plans/x402-list-api-plans-pricing.yml
  - type: Pricing
    url: https://x402-list.com/api
  - type: Conventions
    url: conventions/x402-list-api-conventions.yml
  - type: DataModel
    url: data-model/x402-list-api-data-model.yml
  - type: Lifecycle
    url: lifecycle/x402-list-api-lifecycle.yml
  - type: StatusPage
    url: https://x402-list.com/status
  - type: ChangeLog
    url: changelog/x402-list-api-changelog.yml
  - type: Conformance
    url: conformance/x402-list-api-conformance.yml
  - type: SpectralRules
    url: rules/x402-list-api-spectral.yaml
- aid: x402-list-api:x402-list-api-stats-api
  name: x402 List API Stats API
  description: Aggregate statistics about the x402 ecosystem
  humanURL: https://x402-list.com/api
  baseURL: https://x402-list.com/api/v1
  tags:
  - Stats
  properties:
  - type: OpenAPI
    url: openapi/x402-list-api-stats-api-openapi.yml
  - type: Documentation
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: https://x402-list.com/llms.txt
  - type: LLMsTxt
    url: https://x402-list.com/llms-full.txt
  - type: DeveloperPortal
    url: https://x402-list.com/api
  - type: APIReference
    url: https://x402-list.com/api
  - type: GettingStarted
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: llms/x402-list-api-llms.txt
  - type: ToolCrosswalk
    url: mcp/x402-list-api-tool-crosswalk.yml
  - type: Authentication
    url: authentication/x402-list-api-authentication.yml
  - type: ErrorCatalog
    url: errors/x402-list-api-problem-types.yml
  - type: RateLimits
    url: rate-limits/x402-list-api-rate-limits.yml
  - type: Plans
    url: plans/x402-list-api-plans-pricing.yml
  - type: Pricing
    url: https://x402-list.com/api
  - type: Conventions
    url: conventions/x402-list-api-conventions.yml
  - type: DataModel
    url: data-model/x402-list-api-data-model.yml
  - type: Lifecycle
    url: lifecycle/x402-list-api-lifecycle.yml
  - type: StatusPage
    url: https://x402-list.com/status
  - type: ChangeLog
    url: changelog/x402-list-api-changelog.yml
  - type: Conformance
    url: conformance/x402-list-api-conformance.yml
  - type: SpectralRules
    url: rules/x402-list-api-spectral.yaml
- aid: x402-list-api:x402-list-api-status-api
  name: x402 List API Status API
  description: Get a quick health overview of all monitored services
  humanURL: https://x402-list.com/api
  baseURL: https://x402-list.com/api/v1
  tags:
  - Status
  properties:
  - type: OpenAPI
    url: openapi/x402-list-api-status-api-openapi.yml
  - type: Documentation
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: https://x402-list.com/llms.txt
  - type: LLMsTxt
    url: https://x402-list.com/llms-full.txt
  - type: DeveloperPortal
    url: https://x402-list.com/api
  - type: APIReference
    url: https://x402-list.com/api
  - type: GettingStarted
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: llms/x402-list-api-llms.txt
  - type: ToolCrosswalk
    url: mcp/x402-list-api-tool-crosswalk.yml
  - type: Authentication
    url: authentication/x402-list-api-authentication.yml
  - type: ErrorCatalog
    url: errors/x402-list-api-problem-types.yml
  - type: RateLimits
    url: rate-limits/x402-list-api-rate-limits.yml
  - type: Plans
    url: plans/x402-list-api-plans-pricing.yml
  - type: Pricing
    url: https://x402-list.com/api
  - type: Conventions
    url: conventions/x402-list-api-conventions.yml
  - type: DataModel
    url: data-model/x402-list-api-data-model.yml
  - type: Lifecycle
    url: lifecycle/x402-list-api-lifecycle.yml
  - type: StatusPage
    url: https://x402-list.com/status
  - type: ChangeLog
    url: changelog/x402-list-api-changelog.yml
  - type: Conformance
    url: conformance/x402-list-api-conformance.yml
  - type: SpectralRules
    url: rules/x402-list-api-spectral.yaml
- aid: x402-list-api:x402-list-api-submissions-api
  name: x402 List API Submissions API
  description: Submit new x402 services or facilitators for review and listing
  humanURL: https://x402-list.com/api
  baseURL: https://x402-list.com/api/v1
  tags:
  - Submissions
  properties:
  - type: OpenAPI
    url: openapi/x402-list-api-submissions-api-openapi.yml
  - type: Documentation
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: https://x402-list.com/llms.txt
  - type: LLMsTxt
    url: https://x402-list.com/llms-full.txt
  - type: DeveloperPortal
    url: https://x402-list.com/api
  - type: APIReference
    url: https://x402-list.com/api
  - type: GettingStarted
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: llms/x402-list-api-llms.txt
  - type: ToolCrosswalk
    url: mcp/x402-list-api-tool-crosswalk.yml
  - type: Authentication
    url: authentication/x402-list-api-authentication.yml
  - type: ErrorCatalog
    url: errors/x402-list-api-problem-types.yml
  - type: RateLimits
    url: rate-limits/x402-list-api-rate-limits.yml
  - type: Plans
    url: plans/x402-list-api-plans-pricing.yml
  - type: Pricing
    url: https://x402-list.com/api
  - type: Conventions
    url: conventions/x402-list-api-conventions.yml
  - type: DataModel
    url: data-model/x402-list-api-data-model.yml
  - type: Lifecycle
    url: lifecycle/x402-list-api-lifecycle.yml
  - type: StatusPage
    url: https://x402-list.com/status
  - type: ChangeLog
    url: changelog/x402-list-api-changelog.yml
  - type: Conformance
    url: conformance/x402-list-api-conformance.yml
  - type: SpectralRules
    url: rules/x402-list-api-spectral.yaml
- aid: x402-list-api:x402-list-api-suggestions-api
  name: x402 List API Suggestions API
  description: Post paid suggestions for the directory (feedback in x402)
  humanURL: https://x402-list.com/api
  baseURL: https://x402-list.com/api/v1
  tags:
  - Suggestions
  properties:
  - type: OpenAPI
    url: openapi/x402-list-api-suggestions-api-openapi.yml
  - type: Documentation
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: https://x402-list.com/llms.txt
  - type: LLMsTxt
    url: https://x402-list.com/llms-full.txt
  - type: DeveloperPortal
    url: https://x402-list.com/api
  - type: APIReference
    url: https://x402-list.com/api
  - type: GettingStarted
    url: https://x402-list.com/api
  - type: LLMsTxt
    url: llms/x402-list-api-llms.txt
  - type: ToolCrosswalk
    url: mcp/x402-list-api-tool-crosswalk.yml
  - type: Authentication
    url: authentication/x402-list-api-authentication.yml
  - type: ErrorCatalog
    url: errors/x402-list-api-problem-types.yml
  - type: RateLimits
    url: rate-limits/x402-list-api-rate-limits.yml
  - type: Plans
    url: plans/x402-list-api-plans-pricing.yml
  - type: Pricing
    url: https://x402-list.com/api
  - type: Conventions
    url: conventions/x402-list-api-conventions.yml
  - type: DataModel
    url: data-model/x402-list-api-data-model.yml
  - type: Lifecycle
    url: lifecycle/x402-list-api-lifecycle.yml
  - type: StatusPage
    url: https://x402-list.com/status
  - type: ChangeLog
    url: changelog/x402-list-api-changelog.yml
  - type: Conformance
    url: conformance/x402-list-api-conformance.yml
  - type: SpectralRules
    url: rules/x402-list-api-spectral.yaml
common:
- type: Plans
  url: plans/x402-list-api-plans-pricing.yml
- type: RateLimits
  url: rate-limits/x402-list-api-rate-limits.yml
- url: https://www.x402-list.com/blog
  type: Blog
- url: https://www.x402-list.com/feed.xml
  type: BlogRSS
- type: MCPServer
  url: https://mcp.x402-list.com/mcp
- type: MCPServer
  url: mcp/x402-list-api-mcp.yml
- type: Overlay
  url: overlays/x402-list-api-openapi-overlay.yaml
- type: AgentSkill
  url: skills/_index.yml
- type: Website
  url: https://www.x402-list.com/
- type: VulnerabilityDisclosure
  url: security/x402-list-api-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/x402-list-api-domain-security.yml
- type: WellKnown
  url: well-known/x402-list-api-well-known.yml
- type: APICatalog
  url: https://x402-list.com/.well-known/api-catalog
- type: SecurityTxt
  url: well-known/x402-list-api-security.txt
- type: Security
  url: security/x402-list-api-vulnerability-disclosure.yml
- type: ContentSignal
  url: https://x402-list.com/robots.txt
- type: APIsJSON
  url: https://x402-list.com/.well-known/apis.json
- type: Packages
  url: packages/x402-list-api-packages.yml
- type: Blog
  url: https://x402-list.com/blog
- type: Support
  url: https://x402-list.com/contact
- type: TermsOfService
  url: https://x402-list.com/terms
- type: PrivacyPolicy
  url: https://x402-list.com/privacy
- type: GitHubRepository
  url: https://github.com/mcccsm/x402-list-mcp
maintainers:
- FN: Cosimo Miccolis
  org: x402 List
  email: info@x402-list.com
  url: https://x402-list.com
  X-role: operator and data controller (individual, Italy) — as declared in https://x402-list.com/.well-known/apis.json and
    https://x402-list.com/llms.txt
generated:
  by: apis.io/add
  model: claude-opus-4-8
  confidence: 97
  at: '2026-09-02T09:37:38.394Z'
x-enrichment:
  date: '2026-09-02'
  status: enriched
  artifacts_added: 29
  pass: local-v1

x402 List API — frequently asked questions

Does x402 List API have an API?

Yes. APIs.io lists 11 APIs from x402 List API, including x402 List API Assess API, x402 List API Changes API and x402 List API Checks API, and 8 more.

Is there an OpenAPI specification for the x402 List API?

Yes. APIs.io indexes 11 OpenAPI specifications for x402 List API, each linked for download from this page.

How do I authenticate with the x402 List API?

x402 List API uses bearer-token authentication (0 schemes). The details are profiled on APIs.io as X402 List Api Authentication.

How much does the x402 List API cost?

x402 List API publishes its prices; its Read API access plan is No authentication required for read access. as of 2026-10-28. APIs.io lists 6 pricing plans for x402 List API, with each plan's price, limits and inclusions under Pricing on this page.

Does x402 List API have an MCP server?

Yes. APIs.io lists 1 MCP server for x402 List API.

Is the x402 List API ready for AI agents?

x402 List API has a Kin Score of 59.9 out of 100 (strong) and an Agent Readiness score of 38.1 (agent-ready), scored by API Evangelist on 2026-11-06.

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