{
  "x402Version": 2,
  "id": 27146,
  "slug": "27146",
  "resource": "https://base-gas-x402-production.up.railway.app/gas",
  "description": "Live Base mainnet gas: EIP-1559 base fee, low/medium/high priority tiers in gwei, and a transaction cost estimate for any gas limit.",
  "type": "http",
  "serviceName": "base-gas-x402",
  "resourceType": "Market Data",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0x0D083590c048A243e24a75E3a7C968145DE25B44",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "5000",
      "amountUsd": 0.005,
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "properties": {
      "example": {
        "type": "object"
      },
      "type": {
        "type": "string"
      }
    },
    "required": [
      "type"
    ],
    "type": "object"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET",
          "queryParams": {
            "gasLimit": 21000
          },
          "type": "http"
        },
        "output": {
          "example": {
            "baseFeePerGas": "0.012",
            "blockNumber": "12345678",
            "chain": "base-mainnet",
            "chainId": 8453,
            "estimatedTransferCost": {
              "eth": "0.000000294",
              "gasLimit": 21000,
              "gwei": "294"
            },
            "fetchedAt": "2026-06-22T00:00:00.000Z",
            "gasPrice": "0.014",
            "priorityFeePerGas": {
              "high": "0.004",
              "low": "0.001",
              "medium": "0.002"
            }
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "queryParams": {
                "properties": {
                  "gasLimit": {
                    "default": 21000,
                    "description": "Gas units to price the cost estimate against. Defaults to 21000 (a plain ETH transfer). Use ~65000 for an ERC-20 transfer, ~85000 for an NFT mint, ~180000 for a Uniswap swap, or ~1500000 for a contract deploy.",
                    "maximum": 30000000,
                    "minimum": 21000,
                    "type": "integer"
                  }
                },
                "required": [],
                "type": "object"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
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              "method"
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            "type": "object"
          },
          "output": {
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              "example": {
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                "type": "string"
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            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    },
    "builder-code": {
      "info": {
        "a": "bc_lhfd8zad"
      },
      "schema": {
        "$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"
            },
            "type": "array"
          },
          "w": {
            "description": "Wallet builder code",
            "pattern": "^[a-z0-9_]{1,32}$",
            "type": "string"
          }
        },
        "type": "object"
      }
    }
  },
  "tags": [
    "gas",
    "gas price",
    "gas oracle",
    "base",
    "base-l2",
    "bazaar",
    "builder-code"
  ],
  "sourceHost": "base-gas-x402-production.up.railway.app",
  "lastUpdated": "2026-10-12T09:00:01.543Z",
  "quality": {
    "calls30d": 696,
    "uniquePayers30d": 12,
    "lastCalledAt": "2026-10-12T09:00:01.322Z"
  },
  "metadata": {
    "serviceName": "base-gas-x402",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "gasLimit": 21000
            },
            "type": "http"
          },
          "output": {
            "example": {
              "baseFeePerGas": "0.012",
              "blockNumber": "12345678",
              "chain": "base-mainnet",
              "chainId": 8453,
              "estimatedTransferCost": {
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                "gasLimit": 21000,
                "gwei": "294"
              },
              "fetchedAt": "2026-06-22T00:00:00.000Z",
              "gasPrice": "0.014",
              "priorityFeePerGas": {
                "high": "0.004",
                "low": "0.001",
                "medium": "0.002"
              }
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "gasLimit": {
                      "default": 21000,
                      "description": "Gas units to price the cost estimate against. Defaults to 21000 (a plain ETH transfer). Use ~65000 for an ERC-20 transfer, ~85000 for an NFT mint, ~180000 for a Uniswap swap, or ~1500000 for a contract deploy.",
                      "maximum": 30000000,
                      "minimum": 21000,
                      "type": "integer"
                    }
                  },
                  "required": [],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
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              },
              "required": [
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              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      },
      "builder-code": {
        "info": {
          "a": "bc_lhfd8zad"
        },
        "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}$",
                "type": "string"
              },
              "type": "array"
            },
            "w": {
              "description": "Wallet builder code",
              "pattern": "^[a-z0-9_]{1,32}$",
              "type": "string"
            }
          },
          "type": "object"
        }
      }
    }
  },
  "liveness": {
    "reliability": null
  },
  "verified": false,
  "featured": false,
  "provider": {
    "host": "base-gas-x402-production.up.railway.app",
    "manifest_name": "base-gas-x402-production.up.railway.app",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-10-14T01:15:01.050Z"
  },
  "exampleResponse": {
    "example": {},
    "type": "string"
  }
}