generated: '2026-09-19'
method: probed
source: https://onchainagentintel.io/.well-known/agent-card.json
description: >-
  A2A Agent Card observed at the canonical /.well-known/agent-card.json path on onchainagentintel.io
  (the same 16,805-byte body is served on www.onchainagentintel.io and api.onchainagentintel.io).
  Grade is measured against the A2A 1.0.0 AgentCard object: 'conformant' passes every structural check,
  'near-conformant' is correctly shaped but omits optional fields, 'flavored' fails a hard check and is
  an agent card in spirit rather than in schema. Provider-published by construction — served from the
  provider's own host; nothing here is derived or generated. Verbatim body saved as
  onchainagentintel-io-agent-card.json.
discovery:
  path: /.well-known/agent-card.json
  canonical: true
  host: onchainagentintel.io
  mirrors:
  - https://www.onchainagentintel.io/.well-known/agent-card.json
  - https://api.onchainagentintel.io/.well-known/agent-card.json
  legacy:
    path: /.well-known/agent.json
    url: https://onchainagentintel.io/.well-known/agent.json
    http_status: 200
    note: >-
      A DIFFERENT, pre-0.3-shaped document (14,177 bytes): declares protocolVersion 0.3.0 and the same
      16 skills, but its capabilities field is an array of capability-tag strings rather than the
      AgentCapabilities object, and its url is the website root rather than the JSON-RPC endpoint.
      Not saved; the canonical path is graded.
conformance:
  spec: A2A 1.0.0
  grade: flavored
  protocol_version: null
  preferred_transport: JSONRPC
  checks:
    capabilities_is_object: true
    protocol_version_present: false
    skills_is_array: true
    preferred_transport_present: true
    default_input_modes_present: true
    default_output_modes_present: true
  deviations:
  - field: protocolVersion
    issue: >-
      Absent at the top level of the canonical card (hard check). supportedInterfaces[].protocolVersion
      carries "2.0" for the JSONRPC binding and "1.0" for HTTP+JSON — binding versions, not the A2A
      protocol version. The legacy /.well-known/agent.json copy does declare protocolVersion 0.3.0.
  - field: supportedInterfaces
    issue: >-
      Uses supportedInterfaces[] with protocolBinding rather than the 0.3 additionalInterfaces[] with
      transport; a client reading the 0.3 shape sees only url + preferredTransport.
  - field: extensions
    issue: >-
      capabilities.extensions[0].uri points at the a2a-x402 v0.2 spec on GitHub (required: true) —
      a payment extension every client must honour before any paid skill can be invoked.
card:
  name: Agent Zero
  description: >-
    Comprehensive agent intelligence service for the ERC-8004 agent economy: indexes ERC-8004 agents on
    Base and Ethereum, enriches them with live endpoint probes and on-chain payment activity, scores
    readiness and trust, and sells the intelligence per call over x402 (USDC via EIP-3009 or native ETH).
    Also offers Solidity security audits and ERC-8183 deliverable evaluation.
  url: https://api.onchainagentintel.io/a2a/v1
  version: 1.9.0
  provider: Agent Zero (https://onchainagentintel.io)
  documentation_url: https://onchainagentintel.io/docs.html
  icon_url: https://onchainagentintel.io/logo.png
  streaming: false
  push_notifications: false
  skills: 16
  skill_ids:
  - x402-payment-settlement
  - free MCP server (Model Context Protocol)
  - agent intelligence — profile lookup / capability search / trending & market / peer similarity / market map / ecosystem delta / payment graph / 30-day subscription / subscription status
  - smart contract security audit
  - ERC-8183 deliverable evaluation
  - public coverage stats / leaderboards / agent detail (free)
  file: onchainagentintel-io-agent-card.json
  extensions:
  - uri: https://github.com/google-agentic-commerce/a2a-x402/blob/main/spec/v0.2
    required: true
    x402_version: 1
    networks: [base, ethereum]
    pay_to: '0xaCd134d2AAd0b868EDb395F7d151864188caaF1a'
    discovery_manifest: https://onchainagentintel.io/.well-known/x402.json
  x_mcp_servers:
  - endpoint: https://api.onchainagentintel.io/mcp
    transport: streamable-http
    protocol_version: '2025-06-18'
    tools: [get_coverage_stats, get_leaderboards, get_agent_summary, get_network_teaser]
  x_erc8004:
    chain: base
    chain_id: 8453
    agent_id: 19353
    registry: '0x8004A169FB4a3325136EB29fA0ceB6D2e539a432'
endpoint_probe:
  url: https://api.onchainagentintel.io/a2a/v1
  method: GET
  http_status: 405
  body: '{"detail":"Method Not Allowed"}'
  note: The JSON-RPC endpoint exists and rejects GET as expected; no A2A message was sent.
x-evidence:
  fetched: '2026-09-19'
  url: https://onchainagentintel.io/.well-known/agent-card.json
  http_status: 200
  content_type: application/json
  bytes: 16805
  note: Verbatim body saved alongside this manifest. No field inferred.