Live Ethereum mainnet gas pricing from PublicNode RPC: next-block base fee, 25/50/75th-per

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x6ab8efe305cce67daa48c97bde29c04402822dff",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "speed": "fast"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "base_fee_gwei": 0.0648,
          "blocks_sampled": 5,
          "legacy_gas_price_gwei": 0.0609,
          "priority_fee_gwei": {
            "fast": 0.1337,
            "slow": 0.005,
            "std": 0.0054
          },
          "recommended": {
            "max_fee_gwei": 0.135,
            "max_priority_fee_gwei": 0.0054,
            "speed": "std"
          },
          "source": "Ethereum mainnet via PublicNode RPC (eth_gasPrice + eth_feeHistory, last 5 blocks)"
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "properties": {
                "speed": {
                  "default": "std",
                  "description": "Which priority-fee percentile to recommend (25/50/75)",
                  "enum": [
                    "slow",
                    "std",
                    "fast"
                  ],
                  "type": "string"
                }
              },
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://data.greeneris.io/v1/eth/gas"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://data.greeneris.io/v1/eth/gas");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://data.greeneris.io/v1/eth/gas")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header