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mirrored listing x402 eip155:8453

Single-fact: what does Ethereum mainnet gas cost RIGHT NOW? Returns the latest block’s bas

Single-fact: what does Ethereum mainnet gas cost RIGHT NOW? Returns the latest block’s base fee + blob base fee AND the consensus-computed next-block projection (not a guess — the protocol’s own EIP-1559/4844 arithmetic), straight from eth_feeHistory. Fields: {block, base_fee_gwei, blob_base_fee_gwei, gas_used_ratio, next_base_fee_gwei, next_blob_base_fee_gwei}. Bulk per-block history: /v1/premium/fee-history.csv ($0.05, up to 1024 blocks/call).

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1000 (raw units)
price
4
calls / 30d
3
unique payers
2026-09-08
updated

Provider

api.seneschal.space · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x46Ba634261566CF242c853d1f49511f9268ba674",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "1000",
    "maxTimeoutSeconds": 120
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {},
        "type": "http"
      },
      "output": {
        "example": {
          "as_of_ms": 1765532000000,
          "base_fee_gwei": 0.74721396,
          "base_fee_wei": "747213960",
          "blob_base_fee_gwei": 1e-9,
          "blob_base_fee_wei": "1",
          "blob_gas_used_ratio": 0.25,
          "block": 23012001,
          "gas_used_ratio": 0.4993,
          "next_base_fee_gwei": 0.747189,
          "next_blob_base_fee_gwei": 1e-9,
          "next_block": 23012002
        },
        "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": {
                "as_of_ms": {
                  "type": "integer"
                },
                "base_fee_gwei": {
                  "type": "number"
                },
                "base_fee_wei": {
                  "type": "string"
                },
                "blob_base_fee_gwei": {
                  "type": "number"
                },
                "blob_base_fee_wei": {
                  "type": "string"
                },
                "blob_gas_used_ratio": {
                  "type": "number"
                },
                "block": {
                  "type": "integer"
                },
                "gas_used_ratio": {
                  "type": "number"
                },
                "next_base_fee_gwei": {
                  "type": "number"
                },
                "next_blob_base_fee_gwei": {
                  "type": "number"
                },
                "next_block": {
                  "type": "integer"
                }
              },
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

Use it

curl

curl "https://api.seneschal.space/v1/q/base-fee"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://api.seneschal.space/v1/q/base-fee");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://api.seneschal.space/v1/q/base-fee")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/5089.json, and this resource appears in /discovery/resources and /discovery/search.