anchor-x402

anchor-x402 operates a pay-per-call API surface for AI agents, billed with the x402 HTTP payment protocol instead of API keys or accounts. Eighteen stateless services run on AWS Lambda and FastAPI behind https://api.anchor-x402.com, each returning an x402 v2 402 PaymentRequired challenge that a caller settles per request in USDC on Base or Solana (select routes also settle JPYC on Polygon) via EIP-3009 transferWithAuthorization. The catalog spans on-chain anchoring and attestation, wallet sanctions and risk screening, Web3 data decoding, ENS/SNS name resolution, token pricing, x402 spend accounting, verifiable signed randomness, and LLM-backed content analysis, priced from $0.001 to $1.77 per call. The same 18 services are exposed over MCP (a hosted Streamable HTTP endpoint at https://api.anchor-x402.com/mcp whose tools/list is free and anonymous, plus an npm stdio package) and over a signed A2A JSON-RPC door at /v1/a2a, with a conformant A2A 0.3.0 agent card and a hosted Claude chatbot at chat.anchor-x402.com for non-developers. Source is MIT licensed and the operator publishes a trust portal that states plainly it holds no SOC 2, ISO 27001, PCI or HIPAA certification.

anchor-x402 publishes 17 APIs on the APIs.io network, including Anchor API, Attest API, Aura API, and 14 more. Tagged areas include Company, x402, Agents, Payments, and Blockchain.

anchor-x402’s developer surface includes documentation, API reference, getting-started guide, pricing, sandbox, authentication, code examples, and 25 more developer resources.

🌐 Visit website 📡 Source on GitHub
46.5/100 developing ▬ flat Agent 43/100 agent ready Front door AI 6/6 dominant open core · MIT Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0
1 APIs 1 MCP Servers
Companyx402AgentsPaymentsBlockchainMCPWeb3pay-per-callAgentic PaymentsStablecoinsComplianceAttestationA2A

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0
Composite quality — 46.5/100 · developing
Contract Quality 8.0 / 19
Developer Ergonomics 10.7 / 15
Access Clarity 7.5 / 15
Operational Transparency 1.3 / 10
Contract Governance 1.6 / 9
Discoverability 5.6 / 8
Regulatory Posture 3.8 / 15
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 43/100 · 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 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 8 / 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
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/.
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 github.com/api-evangelist/anchor-x402: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 17

Individual APIs this provider publishes, each with its own machine-readable definition.

anchor-x402 Anchor API

The Anchor API from anchor-x402 — 1 operation(s) for anchor.

anchor-x402 Attest API

The Attest API from anchor-x402 — 2 operation(s) for attest.

anchor-x402 Aura API

The Aura API from anchor-x402 — 1 operation(s) for aura.

anchor-x402 Decode API

The Decode API from anchor-x402 — 2 operation(s) for decode.

anchor-x402 Grade API

The Grade API from anchor-x402 — 1 operation(s) for grade.

anchor-x402 Health API

The Health API from anchor-x402 — 1 operation(s) for health.

anchor-x402 Intel API

The Intel API from anchor-x402 — 1 operation(s) for intel.

anchor-x402 Investigate API

The Investigate API from anchor-x402 — 2 operation(s) for investigate.

anchor-x402 Ledger API

The Ledger API from anchor-x402 — 3 operation(s) for ledger.

anchor-x402 Oracle API

The Oracle API from anchor-x402 — 1 operation(s) for oracle.

anchor-x402 Parse API

The Parse API from anchor-x402 — 1 operation(s) for parse.

anchor-x402 Price API

The Price API from anchor-x402 — 1 operation(s) for price.

anchor-x402 Resolve API

The Resolve API from anchor-x402 — 1 operation(s) for resolve.

anchor-x402 Roast API

The Roast API from anchor-x402 — 1 operation(s) for roast.

anchor-x402 Roll API

The Roll API from anchor-x402 — 1 operation(s) for roll.

anchor-x402 Screen API

The Screen API from anchor-x402 — 1 operation(s) for screen.

anchor-x402 Tldr API

The Tldr API from anchor-x402 — 1 operation(s) for tldr.

Scroll for all 17

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

anchor-x402 MCP Server

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Anchor X402 Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Anchor X402 Rate Limits

0 limits

RATE LIMITS

Security Posture 4

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

Anchor X402 Authentication

2 schemes

SECURITY

Anchor X402 Domain Security

TLSv1.3

SECURITY

Anchor X402 Vulnerability Disclosure

contact published

SECURITY

Anchor X402 Trust Center

trust center published

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 Sandbox
Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt
 MCPServer
MCPServer
 AgentSkill
AgentSkill
 WellKnown
WellKnown

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conformance
Conformance
 DataModel
DataModel

Build 6

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 SourceCode
SourceCode
 ToolCrosswalk
ToolCrosswalk
 Packages
Packages
 SDKs
SDKs
 Examples
Examples

Access & Security 5

Authentication, authorization, and security posture

Security
Security
 TrustCenter
TrustCenter
 Authentication
Authentication
 DomainSecurity
DomainSecurity
 VulnerabilityDisclosure
VulnerabilityDisclosure

Operate 2

Status, limits, changes, and where to get help

StatusPage
StatusPage
 RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Pricing
Pricing
 Plans
Plans

Company 1

The organization behind the API

Website
Website

Other 2

Properties that don't map to a standard resource type

Overlay
Overlay
 AgentCard
AgentCard

Source (apis.yml)

apis.yml Raw ↑ 
aid: anchor-x402
name: anchor-x402
description: anchor-x402 operates a pay-per-call API surface for AI agents, billed with the x402 HTTP payment protocol instead
  of API keys or accounts. Eighteen stateless services run on AWS Lambda and FastAPI behind https://api.anchor-x402.com, each
  returning an x402 v2 402 PaymentRequired challenge that a caller settles per request in USDC on Base or Solana (select routes
  also settle JPYC on Polygon) via EIP-3009 transferWithAuthorization. The catalog spans on-chain anchoring and attestation,
  wallet sanctions and risk screening, Web3 data decoding, ENS/SNS name resolution, token pricing, x402 spend accounting,
  verifiable signed randomness, and LLM-backed content analysis, priced from $0.001 to $1.77 per call. The same 18 services
  are exposed over MCP (a hosted Streamable HTTP endpoint at https://api.anchor-x402.com/mcp whose tools/list is free and
  anonymous, plus an npm stdio package) and over a signed A2A JSON-RPC door at /v1/a2a, with a conformant A2A 0.3.0 agent
  card and a hosted Claude chatbot at chat.anchor-x402.com for non-developers. Source is MIT licensed and the operator publishes
  a trust portal that states plainly it holds no SOC 2, ISO 27001, PCI or HIPAA certification.
deliveryModel:
  model: open-core
  license: MIT
  license_evidence:
    repo: hypeprinter007-stack/anchor-x402
    spdx: MIT
    stars: 4
  open_source: true
  commercial: true
  callable_host: false
  label: Open core · an OSS project plus a commercial hosted product
  confidence: medium
  source:
  - openapi
  - pricing
  - repository-license
  generated: '2026-09-25'
  method: derived
image: https://anchor-x402.com/og.png
url: https://raw.githubusercontent.com/api-evangelist/anchor-x402/refs/heads/main/apis.yml
x-type: company
x-source: manual:direct-request
x-tier: stub
x-tier-reason: direct-request
specificationVersion: '0.20'
created: '2026-09-11'
modified: '2026-09-11'
position: Producing
x-docs-platform: swagger-ui
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-09-18
tags:
- Company
- x402
- Agents
- Payments
- Blockchain
- MCP
- Web3
- pay-per-call
- Agentic Payments
- Stablecoins
- Compliance
- Attestation
- A2A
tags_raw:
- Company
- x402
- Agents
- Payments
- Blockchain
- MCP
- Web3
- Pay Per Call
- Agent Payments
- Stablecoins
- Compliance
- Attestation
- A2A
apis:
- aid: anchor-x402:anchor-x402-anchor-api
  name: anchor-x402 Anchor API
  description: The Anchor API from anchor-x402 — 1 operation(s) for anchor.
  humanURL: https://api.anchor-x402.com/docs
  baseURL: https://api.anchor-x402.com
  tags:
  - Anchor
  properties:
  - type: OpenAPI
    url: openapi/anchor-x402-anchor-api-openapi.yml
  - type: Documentation
    url: https://api.anchor-x402.com/docs
  - type: APIReference
    url: https://api.anchor-x402.com/redoc
- aid: anchor-x402:anchor-x402-attest-api
  name: anchor-x402 Attest API
  description: The Attest API from anchor-x402 — 2 operation(s) for attest.
  humanURL: https://api.anchor-x402.com/docs
  baseURL: https://api.anchor-x402.com
  tags:
  - Attest
  properties:
  - type: OpenAPI
    url: openapi/anchor-x402-attest-api-openapi.yml
  - type: Documentation
    url: https://api.anchor-x402.com/docs
  - type: APIReference
    url: https://api.anchor-x402.com/redoc
- aid: anchor-x402:anchor-x402-aura-api
  name: anchor-x402 Aura API
  description: The Aura API from anchor-x402 — 1 operation(s) for aura.
  humanURL: https://api.anchor-x402.com/docs
  baseURL: https://api.anchor-x402.com
  tags:
  - Aura
  properties:
  - type: OpenAPI
    url: openapi/anchor-x402-aura-api-openapi.yml
  - type: Documentation
    url: https://api.anchor-x402.com/docs
  - type: APIReference
    url: https://api.anchor-x402.com/redoc
- aid: anchor-x402:anchor-x402-decode-api
  name: anchor-x402 Decode API
  description: The Decode API from anchor-x402 — 2 operation(s) for decode.
  humanURL: https://api.anchor-x402.com/docs
  baseURL: https://api.anchor-x402.com
  tags:
  - Decode
  properties:
  - type: OpenAPI
    url: openapi/anchor-x402-decode-api-openapi.yml
  - type: Documentation
    url: https://api.anchor-x402.com/docs
  - type: APIReference
    url: https://api.anchor-x402.com/redoc
- aid: anchor-x402:anchor-x402-grade-api
  name: anchor-x402 Grade API
  description: The Grade API from anchor-x402 — 1 operation(s) for grade.
  humanURL: https://api.anchor-x402.com/docs
  baseURL: https://api.anchor-x402.com
  tags:
  - Grade
  properties:
  - type: OpenAPI
    url: openapi/anchor-x402-grade-api-openapi.yml
  - type: Documentation
    url: https://api.anchor-x402.com/docs
  - type: APIReference
    url: https://api.anchor-x402.com/redoc
- aid: anchor-x402:anchor-x402-health-api
  name: anchor-x402 Health API
  description: The Health API from anchor-x402 — 1 operation(s) for health.
  humanURL: https://api.anchor-x402.com/docs
  baseURL: https://api.anchor-x402.com
  tags:
  - Health
  properties:
  - type: OpenAPI
    url: openapi/anchor-x402-health-api-openapi.yml
  - type: Documentation
    url: https://api.anchor-x402.com/docs
  - type: APIReference
    url: https://api.anchor-x402.com/redoc
- aid: anchor-x402:anchor-x402-intel-api
  name: anchor-x402 Intel API
  description: The Intel API from anchor-x402 — 1 operation(s) for intel.
  humanURL: https://api.anchor-x402.com/docs
  baseURL: https://api.anchor-x402.com
  tags:
  - Intel
  properties:
  - type: OpenAPI
    url: openapi/anchor-x402-intel-api-openapi.yml
  - type: Documentation
    url: https://api.anchor-x402.com/docs
  - type: APIReference
    url: https://api.anchor-x402.com/redoc
- aid: anchor-x402:anchor-x402-investigate-api
  name: anchor-x402 Investigate API
  description: The Investigate API from anchor-x402 — 2 operation(s) for investigate.
  humanURL: https://api.anchor-x402.com/docs
  baseURL: https://api.anchor-x402.com
  tags:
  - Investigate
  properties:
  - type: OpenAPI
    url: openapi/anchor-x402-investigate-api-openapi.yml
  - type: Documentation
    url: https://api.anchor-x402.com/docs
  - type: APIReference
    url: https://api.anchor-x402.com/redoc
- aid: anchor-x402:anchor-x402-ledger-api
  name: anchor-x402 Ledger API
  description: The Ledger API from anchor-x402 — 3 operation(s) for ledger.
  humanURL: https://api.anchor-x402.com/docs
  baseURL: https://api.anchor-x402.com
  tags:
  - Ledger
  properties:
  - type: OpenAPI
    url: openapi/anchor-x402-ledger-api-openapi.yml
  - type: Documentation
    url: https://api.anchor-x402.com/docs
  - type: APIReference
    url: https://api.anchor-x402.com/redoc
- aid: anchor-x402:anchor-x402-oracle-api
  name: anchor-x402 Oracle API
  description: The Oracle API from anchor-x402 — 1 operation(s) for oracle.
  humanURL: https://api.anchor-x402.com/docs
  baseURL: https://api.anchor-x402.com
  tags:
  - Oracle
  properties:
  - type: OpenAPI
    url: openapi/anchor-x402-oracle-api-openapi.yml
  - type: Documentation
    url: https://api.anchor-x402.com/docs
  - type: APIReference
    url: https://api.anchor-x402.com/redoc
- aid: anchor-x402:anchor-x402-parse-api
  name: anchor-x402 Parse API
  description: The Parse API from anchor-x402 — 1 operation(s) for parse.
  humanURL: https://api.anchor-x402.com/docs
  baseURL: https://api.anchor-x402.com
  tags:
  - Parse
  properties:
  - type: OpenAPI
    url: openapi/anchor-x402-parse-api-openapi.yml
  - type: Documentation
    url: https://api.anchor-x402.com/docs
  - type: APIReference
    url: https://api.anchor-x402.com/redoc
- aid: anchor-x402:anchor-x402-price-api
  name: anchor-x402 Price API
  description: The Price API from anchor-x402 — 1 operation(s) for price.
  humanURL: https://api.anchor-x402.com/docs
  baseURL: https://api.anchor-x402.com
  tags:
  - Price
  properties:
  - type: OpenAPI
    url: openapi/anchor-x402-price-api-openapi.yml
  - type: Documentation
    url: https://api.anchor-x402.com/docs
  - type: APIReference
    url: https://api.anchor-x402.com/redoc
- aid: anchor-x402:anchor-x402-resolve-api
  name: anchor-x402 Resolve API
  description: The Resolve API from anchor-x402 — 1 operation(s) for resolve.
  humanURL: https://api.anchor-x402.com/docs
  baseURL: https://api.anchor-x402.com
  tags:
  - Resolve
  properties:
  - type: OpenAPI
    url: openapi/anchor-x402-resolve-api-openapi.yml
  - type: Documentation
    url: https://api.anchor-x402.com/docs
  - type: APIReference
    url: https://api.anchor-x402.com/redoc
- aid: anchor-x402:anchor-x402-roast-api
  name: anchor-x402 Roast API
  description: The Roast API from anchor-x402 — 1 operation(s) for roast.
  humanURL: https://api.anchor-x402.com/docs
  baseURL: https://api.anchor-x402.com
  tags:
  - Roast
  properties:
  - type: OpenAPI
    url: openapi/anchor-x402-roast-api-openapi.yml
  - type: Documentation
    url: https://api.anchor-x402.com/docs
  - type: APIReference
    url: https://api.anchor-x402.com/redoc
- aid: anchor-x402:anchor-x402-roll-api
  name: anchor-x402 Roll API
  description: The Roll API from anchor-x402 — 1 operation(s) for roll.
  humanURL: https://api.anchor-x402.com/docs
  baseURL: https://api.anchor-x402.com
  tags:
  - Roll
  properties:
  - type: OpenAPI
    url: openapi/anchor-x402-roll-api-openapi.yml
  - type: Documentation
    url: https://api.anchor-x402.com/docs
  - type: APIReference
    url: https://api.anchor-x402.com/redoc
- aid: anchor-x402:anchor-x402-screen-api
  name: anchor-x402 Screen API
  description: The Screen API from anchor-x402 — 1 operation(s) for screen.
  humanURL: https://api.anchor-x402.com/docs
  baseURL: https://api.anchor-x402.com
  tags:
  - Screen
  properties:
  - type: OpenAPI
    url: openapi/anchor-x402-screen-api-openapi.yml
  - type: Documentation
    url: https://api.anchor-x402.com/docs
  - type: APIReference
    url: https://api.anchor-x402.com/redoc
- aid: anchor-x402:anchor-x402-tldr-api
  name: anchor-x402 Tldr API
  description: The Tldr API from anchor-x402 — 1 operation(s) for tldr.
  humanURL: https://api.anchor-x402.com/docs
  baseURL: https://api.anchor-x402.com
  tags:
  - Tldr
  properties:
  - type: OpenAPI
    url: openapi/anchor-x402-tldr-api-openapi.yml
  - type: Documentation
    url: https://api.anchor-x402.com/docs
  - type: APIReference
    url: https://api.anchor-x402.com/redoc
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Overlay
  url: overlays/anchor-x402-openapi-overlay.yaml
- type: Website
  url: https://anchor-x402.com
- type: DeveloperPortal
  url: https://anchor-x402.com
- type: Documentation
  url: https://api.anchor-x402.com/docs
- type: APIReference
  url: https://api.anchor-x402.com/redoc
- type: GettingStarted
  url: https://anchor-x402.com/guides/pay-x402-api-node/
- type: GitHubOrganization
  url: https://github.com/hypeprinter007-stack
- type: SourceCode
  url: https://github.com/hypeprinter007-stack/anchor-x402
- type: Pricing
  url: https://anchor-x402.com/.well-known/x402.json
- type: StatusPage
  url: https://anchor-x402.betteruptime.com
- type: Security
  url: security/anchor-x402-vulnerability-disclosure.yml
- type: TrustCenter
  url: security/anchor-x402-trust-center.yml
- type: Sandbox
  url: sandbox/anchor-x402-sandbox.yml
- type: LLMsTxt
  url: llms/anchor-x402-llms.txt
- type: AgentCard
  url: a2a/anchor-x402-a2a.yml
- type: MCPServer
  url: mcp/anchor-x402-mcp.yml
- type: ToolCrosswalk
  url: mcp/anchor-x402-tool-crosswalk.yml
- type: AgentSkill
  url: skills/_index.yml
- type: WellKnown
  url: well-known/anchor-x402-well-known.yml
- type: Packages
  url: packages/anchor-x402-packages.yml
- type: SDKs
  url: packages/anchor-x402-packages.yml
- type: Authentication
  url: authentication/anchor-x402-authentication.yml
- type: Conventions
  url: conventions/anchor-x402-conventions.yml
- type: ErrorCatalog
  url: errors/anchor-x402-problem-types.yml
- type: Lifecycle
  url: lifecycle/anchor-x402-lifecycle.yml
- type: Conformance
  url: conformance/anchor-x402-conformance.yml
- type: DomainSecurity
  url: security/anchor-x402-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/anchor-x402-vulnerability-disclosure.yml
- type: DataModel
  url: data-model/anchor-x402-data-model.yml
- type: Examples
  url: examples/anchor-x402-examples.yml
- type: Plans
  url: plans/anchor-x402-plans-pricing.yml
- type: RateLimits
  url: rate-limits/anchor-x402-rate-limits.yml
x-enrichment:
  date: '2026-09-11'
  status: enriched
  artifacts_added: 36
  pass: local-v3

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