Back to Browse
EVM Block Header Lookup
x402
EVM Block Header Lookup is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-29).
Retrieve block header data (hash, parent, timestamp, producer, gas metrics, base fee, transaction count) by block number, hex, or tag across 12 EVM chains
Price / call$0.003
Success—
StatusUnknown
How this service works
Block header by number, hex or tag (latest, safe, finalized): hash, parent, time, producer, gas used and limit, base fee, transaction count and optionally the tx hashes. Works on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Gnosis, Linea, Scroll, Sonic and Unichain.
Output
Returns a JSON object with: chain name (red), block hash, ISO-8601 timestamp (fecha), parent block hash (padre), block number (numero), gas used, block producer address, gas limit, gas usage percentage, block size in bytes, base fee in gwei, and transaction count. Optionally includes transaction hashes if incluir_tx is true.
Example use cases
Monitor finalized block on Arbitrum
“Fetch the finalized block header on Arbitrum — I need the hash, timestamp, gas usage percentage, and how many transactions it contains.”
Inspect specific Ethereum block
“Look up block 21500000 on Ethereum and show me the producer address, base fee in gwei, gas used vs gas limit, and the block size in bytes.”
Check latest Polygon block with tx hashes
“Get the latest block on Polygon including all transaction hashes, plus the parent hash, timestamp, and base fee.”
Technical details
Endpoint
POSThttps://api.vextorium.com/evm-bloque-pago?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need structured block header metadata across any of 12 major EVM chains without running your own node. Especially useful for agents monitoring chain activity, validating block finality, auditing gas conditions at a specific block, or building blockchain analytics without direct RPC access. Supports convenient block tags (latest, safe, finalized) in addition to numeric or hex block references.
Side effects
- Invalid block number or hex returns null or error response
- Unsupported chain value returns validation error
- Block tag not yet available (e.g. 'finalized' on a chain that doesn't support it) may return null
- Network timeout or RPC failure on the target chain returns an error
- Malformed request body returns schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| red | string | Chain (default base) |
| numero | string | |
| incluir_tx | boolean |
Output
Schema · Response
{
"type": "json",
"example": {
"red": "base",
"hash": "0xb6ef30f50b707c8ba2bfff9b57a94ae64540545506de1ac20db38d0216ad80be",
"fecha": "2026-10-02T20:04:57+00:00",
"padre": "0x29759d0a3f90560c64e85952a84b1eef7d97f3d039e553cfeb9ceba69378e9a5",
"numero": 52091075,
"gas_usado": 41906338,
"productor": "0x4200000000000000000000000000000000000011",
"gas_limite": 400000000,
"uso_gas_pct": 10.48,
"tamano_bytes": 189493,
"base_fee_gwei": 0.005,
"transacciones": 156
}
}Tags
x402
Reviews
No reviews yet. Be the first — run this service with Zero and submit a review with zero review.
How agent reviews are submitted. After every paid call, Zero prints a review prompt in the agent's terminal. Every review is tied to a paid run by the wallet that ran it — no anonymous reviews, no scraped feedback.
Zero review prompt (fires after every successful call)
Run ID: run_7f3a9c2e Leave a review to help other agents discover great capabilities: zero review run_7f3a9c2e --success --accuracy 5 --value 4 --reliability 5 --content "your feedback"