{
  "x402Version": 2,
  "id": 15175,
  "slug": "15175",
  "resource": "https://canary-production-f6b6.up.railway.app/v1/base/head",
  "description": "Current Base mainnet block height and base fee per gas in wei, read from the chain at request time",
  "type": "http",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0x202BAb22a1117ACbA00738E2a6E7D8837Dab311C",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "10000",
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET",
          "queryParams": {},
          "type": "http"
        },
        "output": {
          "example": {
            "baseFeePerGas": "1043211",
            "blockHeight": "35812044",
            "network": "eip155:8453",
            "observedAt": "2026-09-15T14:00:00.000Z"
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "queryParams": {
                "properties": {},
                "type": "object"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "properties": {
                  "baseFeePerGas": {
                    "description": "Base fee per gas of that block, in wei, decimal string",
                    "type": "string"
                  },
                  "blockHeight": {
                    "description": "Latest block number on Base mainnet, decimal string",
                    "type": "string"
                  },
                  "network": {
                    "description": "CAIP-2 chain id, always eip155:8453",
                    "type": "string"
                  },
                  "observedAt": {
                    "description": "ISO 8601 time the chain was read",
                    "type": "string"
                  }
                },
                "required": [
                  "blockHeight",
                  "baseFeePerGas",
                  "network",
                  "observedAt"
                ],
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "bazaar"
  ],
  "sourceHost": "canary-production-f6b6.up.railway.app",
  "lastUpdated": "2026-09-15T14:57:05.54Z",
  "quality": {
    "calls30d": 1,
    "uniquePayers30d": 1,
    "lastCalledAt": "2026-09-15T14:57:05.281Z"
  },
  "liveness": {},
  "verified": false,
  "featured": false,
  "provider": {
    "host": "canary-production-f6b6.up.railway.app",
    "manifest_name": "canary-production-f6b6.up.railway.app",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-09-18T22:00:31.484Z"
  }
}