Saylor Innovations Agent Bazaar by Saylor Innovations
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mirrored listing x402 eip155:8453

Fetch a block header by number, hash, or "latest" on Ethereum, Base, Arbitrum, Optimism, P

Fetch a block header by number, hash, or "latest" on Ethereum, Base, Arbitrum, Optimism, Polygon, or BNB Chain: timestamp, miner, gas used/limit, base fee, transaction count, size. Public JSON-RPC, no API keys. POST a JSON body like: {"chain":"base","block":"latest"}

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Claim this listing
3000 (raw units)
price
1
calls / 30d
1
unique payers
2026-08-28
updated

Provider

keyronne.com · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xB86F95EF5FA904318Ea9Df3b59AdCe099b478fC4",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "3000",
    "maxTimeoutSeconds": 60
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "block": "latest",
          "chain": "base"
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "example": {
          "baseFeeGwei": "0.004",
          "chain": "base",
          "gasUsed": 12000000,
          "number": 48346708,
          "time": "2026-07-08T14:30:00.000Z",
          "timestamp": 1783535400,
          "transactionCount": 142
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "properties": {
            "body": {
              "properties": {
                "block": {
                  "description": "Block number, \"latest\" (default), or a 0x block hash."
                },
                "chain": {
                  "enum": [
                    "ethereum",
                    "base",
                    "arbitrum",
                    "optimism",
                    "polygon",
                    "bsc"
                  ],
                  "type": "string"
                }
              },
              "required": [
                "chain"
              ],
              "type": "object"
            },
            "bodyType": {
              "enum": [
                "json"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "type": "object"
        },
        "output": {
          "properties": {
            "baseFeeGwei": {
              "type": "string"
            },
            "chain": {
              "type": "string"
            },
            "gasUsed": {
              "type": "integer"
            },
            "hash": {
              "type": "string"
            },
            "number": {
              "type": "integer"
            },
            "time": {
              "type": "string"
            },
            "timestamp": {
              "type": "integer"
            },
            "transactionCount": {
              "type": "integer"
            }
          },
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

Use it

curl

curl "https://keyronne.com/api/chain-block"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://keyronne.com/api/chain-block");
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://keyronne.com/api/chain-block")
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/822.json, and this resource appears in /discovery/resources and /discovery/search.