{
  "x402Version": 2,
  "id": 28124,
  "slug": "28124",
  "resource": "https://agent402.tools/api/a2a-card-validate",
  "description": "Validate an A2A (Agent2Agent protocol) Agent Card: required fields, skill shape, transport names, capability flags - spec v0.3 structural core. Returns errors, interop warnings, and a normalized summary (skills, interfaces, capabilities). Deterministic mini-A2A tooling - check a card before your agent trusts it.",
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  "serviceName": "A2A Agent Card validate",
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              "name": {
                "type": "string"
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              "skillCount": {
                "type": "integer"
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          },
          "warnings": {
            "type": "array"
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          "warnings",
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      "type": {
        "type": "string"
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    "required": [
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    "type": "object"
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  "extensions": {
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                "stateTransitionHistory": false,
                "streaming": true
              },
              "defaultInputModes": [
                "application/json",
                "text/plain"
              ],
              "defaultOutputModes": [
                "application/json"
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              "name": "Sample Weather Agent",
              "preferredTransport": "JSONRPC",
              "protocolVersion": "0.3.0",
              "provider": {
                "organization": "Example Org",
                "url": "https://example.com"
              },
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                  "examples": [
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                  ],
                  "id": "get-forecast",
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                  "tags": [
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                    "forecast"
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              "url": "https://example.com/a2a/v1",
              "version": "1.0.0"
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          },
          "bodyType": "json",
          "method": "POST",
          "type": "http"
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              "skillCount": 1
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            "valid": true,
            "warnings": []
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        "properties": {
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            "properties": {
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                "properties": {
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                    "type": "object"
                  }
                },
                "required": [
                  "card"
                ]
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
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              "method": {
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        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "additionalProperties": false,
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            "type": "array"
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          "required": {
            "type": "boolean"
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        },
        "required": [
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        "type": "object"
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    }
  },
  "tags": [
    "data",
    "a2a",
    "agent2agent",
    "agent-card",
    "validate",
    "bazaar",
    "builder-code",
    "payment-identifier"
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  "sourceHost": "agent402.tools",
  "lastUpdated": "2026-10-08T06:10:36.041Z",
  "quality": {
    "calls30d": 3,
    "uniquePayers30d": 3,
    "lastCalledAt": "2026-10-08T06:10:35.841Z"
  },
  "metadata": {
    "serviceName": "A2A Agent Card validate",
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1784423094/bazaar-icons/478aced8e219894c.png",
    "extensions": {
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                  "stateTransitionHistory": false,
                  "streaming": true
                },
                "defaultInputModes": [
                  "application/json",
                  "text/plain"
                ],
                "defaultOutputModes": [
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                ],
                "description": "A sample A2A Agent Card served as a static example for card tooling. This describes a fictional weather agent, not a live A2A endpoint.",
                "name": "Sample Weather Agent",
                "preferredTransport": "JSONRPC",
                "protocolVersion": "0.3.0",
                "provider": {
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                  "url": "https://example.com"
                },
                "skills": [
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                    "description": "Returns a city's 5-day forecast.",
                    "examples": [
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                    "name": "Get weather forecast",
                    "tags": [
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                      "forecast"
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                "version": "1.0.0"
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            "bodyType": "json",
            "method": "POST",
            "type": "http"
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              "summary": {
                "name": "Sample Weather Agent",
                "skillCount": 1
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              "valid": true,
              "warnings": []
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            "type": "json"
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          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
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                  "properties": {
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                      "description": "the Agent Card JSON (object or JSON string)",
                      "type": "object"
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    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-10-14T01:15:01.050Z"
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    "summary": {
      "name": "Sample Weather Agent",
      "skillCount": 1
    },
    "valid": true,
    "warnings": []
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}