{
  "x402Version": 2,
  "id": 27148,
  "slug": "27148",
  "resource": "https://base-gas-x402-production.up.railway.app/gas/compare",
  "description": "Live gas cost comparison across Base, OP Mainnet, Arbitrum One, and Ethereum in one call, ranked cheapest first.",
  "type": "http",
  "serviceName": "base-gas-x402",
  "resourceType": "Market Data",
  "accepts": [
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      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0x0D083590c048A243e24a75E3a7C968145DE25B44",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "10000",
      "amountUsd": 0.01,
      "maxTimeoutSeconds": 300
    }
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  "extensions": {
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      "info": {
        "input": {
          "method": "GET",
          "queryParams": {
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          },
          "type": "http"
        },
        "output": {
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            "baseVsEthereum": "Base is 240.5x cheaper than Ethereum",
            "basis": "current gas price x gasLimit",
            "chains": [
              {
                "baseFeePerGas": "0.005",
                "blockNumber": "49106604",
                "chain": "base",
                "chainId": 8453,
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                  "gasLimit": 21000,
                  "gwei": "126"
                },
                "gasPrice": "0.006",
                "label": "Base"
              }
            ],
            "cheapest": "base",
            "fetchedAt": "2026-07-25T18:02:36.639Z",
            "gasLimit": 21000,
            "unavailable": []
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
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            "additionalProperties": false,
            "properties": {
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                "enum": [
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                "type": "string"
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              "queryParams": {
                "properties": {
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                    "default": 21000,
                    "description": "Gas units to price each chain against. Defaults to 21000 (a plain ETH transfer).",
                    "maximum": 30000000,
                    "minimum": 21000,
                    "type": "integer"
                  }
                },
                "required": [],
                "type": "object"
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              "type": {
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            "type": "object"
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        "required": [
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        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "additionalProperties": false,
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            "description": "Service builder codes",
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            "type": "array"
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            "pattern": "^[a-z0-9_]{1,32}$",
            "type": "string"
          }
        },
        "type": "object"
      }
    }
  },
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    "cross-chain",
    "l2 fees",
    "base",
    "cheapest chain",
    "bazaar",
    "builder-code"
  ],
  "sourceHost": "base-gas-x402-production.up.railway.app",
  "lastUpdated": "2026-10-02T01:23:39.696Z",
  "quality": {
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    "uniquePayers30d": 2,
    "lastCalledAt": "2026-10-02T01:23:39.477Z"
  },
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    "extensions": {
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            "queryParams": {
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            },
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                    "gwei": "126"
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              ],
              "cheapest": "base",
              "fetchedAt": "2026-07-25T18:02:36.639Z",
              "gasLimit": 21000,
              "unavailable": []
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
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              "properties": {
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                      "minimum": 21000,
                      "type": "integer"
                    }
                  },
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                  "type": "object"
                },
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      "builder-code": {
        "info": {
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        },
        "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": {
    "baseRank": 1,
    "baseVsEthereum": "Base is 240.5x cheaper than Ethereum",
    "basis": "current gas price x gasLimit",
    "chains": [
      {
        "baseFeePerGas": "0.005",
        "blockNumber": "49106604",
        "chain": "base",
        "chainId": 8453,
        "estimatedCost": {
          "eth": "0.000000126",
          "gasLimit": 21000,
          "gwei": "126"
        },
        "gasPrice": "0.006",
        "label": "Base"
      }
    ],
    "cheapest": "base",
    "fetchedAt": "2026-07-25T18:02:36.639Z",
    "gasLimit": 21000,
    "unavailable": []
  }
}