{
  "x402Version": 2,
  "id": 1620,
  "slug": "1620",
  "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.",
  "type": "http",
  "accepts": [
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      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0",
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      "maxTimeoutSeconds": 300
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      "maxTimeoutSeconds": 300
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      "maxTimeoutSeconds": 300
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      "payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0",
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      "maxTimeoutSeconds": 300
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      "scheme": "upto",
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      "maxTimeoutSeconds": 300
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      "maxTimeoutSeconds": 300
    },
    {
      "scheme": "exact",
      "network": "stellar:pubnet",
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    },
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      "scheme": "exact",
      "network": "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=",
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      "asset": "31566704",
      "amount": "2000",
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "card": {
              "capabilities": {
                "pushNotifications": false,
                "stateTransitionHistory": false,
                "streaming": true
              },
              "defaultInputModes": [
                "application/json",
                "text/plain"
              ],
              "defaultOutputModes": [
                "application/json"
              ],
              "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": {
                "organization": "Example Org",
                "url": "https://example.com"
              },
              "skills": [
                {
                  "description": "Returns a city's 5-day forecast.",
                  "examples": [
                    "What is the weather in Paris this week?"
                  ],
                  "id": "get-forecast",
                  "name": "Get weather forecast",
                  "tags": [
                    "weather",
                    "forecast"
                  ]
                }
              ],
              "url": "https://example.com/a2a/v1",
              "version": "1.0.0"
            }
          },
          "bodyType": "json",
          "method": "POST",
          "type": "http"
        },
        "output": {
          "example": {
            "errors": [],
            "summary": {
              "name": "Sample Weather Agent",
              "skillCount": 1
            },
            "valid": true,
            "warnings": []
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "body": {
                "properties": {
                  "card": {
                    "description": "the Agent Card JSON (object or JSON string)",
                    "type": "object"
                  }
                },
                "required": [
                  "card"
                ]
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              },
              "method": {
                "enum": [
                  "POST"
                ],
                "type": "string"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "properties": {
                  "errors": {
                    "type": "array"
                  },
                  "summary": {
                    "properties": {
                      "name": {
                        "type": "string"
                      },
                      "skillCount": {
                        "type": "integer"
                      }
                    },
                    "type": "object"
                  },
                  "valid": {
                    "type": "boolean"
                  },
                  "warnings": {
                    "type": "array"
                  }
                },
                "required": [
                  "valid",
                  "errors",
                  "warnings",
                  "summary"
                ],
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    },
    "builder-code": {
      "info": {
        "a": "bc_b4aw4uzd"
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "additionalProperties": false,
        "properties": {
          "a": {
            "description": "App builder code",
            "pattern": "^[a-z0-9_]{1,32}$",
            "type": "string"
          },
          "s": {
            "description": "Service builder codes",
            "items": {
              "pattern": "^[a-z0-9_]{1,32}$",
              "type": "string"
            },
            "maxItems": 11,
            "type": "array"
          },
          "w": {
            "description": "Wallet builder code",
            "pattern": "^[a-z0-9_]{1,32}$",
            "type": "string"
          }
        },
        "type": "object"
      }
    },
    "payment-identifier": {
      "info": {
        "required": false
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "id": {
            "maxLength": 128,
            "minLength": 16,
            "pattern": "^[a-zA-Z0-9_-]+$",
            "type": "string"
          },
          "required": {
            "type": "boolean"
          }
        },
        "required": [
          "required"
        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "bazaar",
    "builder-code",
    "payment-identifier"
  ],
  "sourceHost": "agent402.tools",
  "lastUpdated": "2026-09-14T18:43:59.645Z",
  "quality": {
    "calls30d": 5,
    "uniquePayers30d": 2,
    "lastCalledAt": "2026-09-14T18:43:59.377Z"
  },
  "liveness": {},
  "verified": false,
  "featured": false,
  "provider": {
    "host": "agent402.tools",
    "manifest_name": "agent402.tools",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-09-18T22:00:31.484Z"
  }
}