ChainAware A2A Agent and x402 API

Agent-facing surface on api.chainaware.ai: an A2A 0.3.0 agent card at /.well-known/agent-card.json (also at the legacy /.well-known/agent.json) declaring five skills — fraud_check, fraud_audit, wallet_segment, rug_pull, credit_score — each bound to a POST endpoint under https://api.chainaware.ai/api/ and paid either with an x-api-key or per call through the x402 extension (USDC on Base, eip155:8453, $0.15 per call). The JSON-RPC endpoint answers message/send at /api/a2a/ (the card's declared /api/a2a without the trailing slash 404s, as do tasks/get and agent/getAuthenticatedExtendedCard). An unauthenticated POST to /api/fraud/check returns a live HTTP 402 with an x402 v2 PaymentRequirements header, and /api/capabilities publishes a machine-readable capabilities document with per-call pricing.

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API
curl "https://apis.io/api/v1/apis/chainaware-a2a-x402-agent-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑
aid: chainaware-ai:chainaware-a2a-x402-agent-api
name: ChainAware A2A Agent and x402 API
description: 'Agent-facing surface on api.chainaware.ai: an A2A 0.3.0 agent card at /.well-known/agent-card.json
  (also at the legacy /.well-known/agent.json) declaring five skills — fraud_check, fraud_audit, wallet_segment,
  rug_pull, credit_score — each bound to a POST endpoint under https://api.chainaware.ai/api/ and paid
  either with an x-api-key or per call through the x402 extension (USDC on Base, eip155:8453, $0.15 per
  call). The JSON-RPC endpoint answers message/send at /api/a2a/ (the card''s declared /api/a2a without
  the trailing slash 404s, as do tasks/get and agent/getAuthenticatedExtendedCard). An unauthenticated
  POST to /api/fraud/check returns a live HTTP 402 with an x402 v2 PaymentRequirements header, and /api/capabilities
  publishes a machine-readable capabilities document with per-call pricing.'
humanURL: https://chainaware.ai/x402-payment
baseURL: https://api.chainaware.ai/api
tags:
- A2A
- x402
- Agent-Native
- Agents
- Fraud Prevention
tags_raw:
- A2A
- x402
- agent-native
- Agents
- Fraud Detection
properties:
- type: AgentCard
  url: a2a/chainaware-ai-a2a.yml
- type: AgentCard
  name: A2A Agent Card (provider-hosted)
  url: https://api.chainaware.ai/.well-known/agent-card.json
- type: Documentation
  name: x402 capabilities document (machine-readable, provider-hosted)
  url: https://api.chainaware.ai/api/capabilities
- type: Documentation
  url: https://swagger.chainaware.ai/