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Block Number Lookup (Base / Ethereum)
x402
Block Number Lookup (Base / Ethereum) is a paid API for AI agents from x402-gateway-production-1f21.up.railway.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-14).
Returns the current block number for a specified blockchain network (Base or Ethereum) via a machine-payable x402 GET request.
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-payable x402 utilities for hashing, Base64, UUID generation, unit and timezone conversion, realtime crypto market data, webpage/document extraction, URL-to-Markdown, metadata, RAG ingestion and deterministic website change detection.
Output
Returns a JSON object containing the current block number for the requested network (Base or Ethereum), along with a status field indicating readiness of the response.
Example use cases
Transaction finality check for DeFi agent
“What is the current block number on Base? I need it to calculate how many confirmations my recent transaction has.”
On-chain timing logic for smart contract automation
“Fetch the latest block number on Ethereum so I can determine whether enough blocks have passed to trigger the next step in my automation.”
Real-time block height monitoring for trading bot
“Give me the current block height on Base — I need it to timestamp my trading signals accurately.”
Technical details
Endpoint
GEThttps://x402-gateway-production-1f21.up.railway.app/block-number?utm_source=zero.xyzWhen to prefer
Use this endpoint when an autonomous agent needs a real-time, machine-payable block number lookup for Base or Ethereum without setting up its own RPC node. Ideal for agents that need current block height for transaction confirmation counting, on-chain timing, or sequencing smart contract actions. Prefer this over free public RPCs when operating in a pay-per-use x402 agent payment architecture where cost accounting per call is important.
Side effects
- Invalid or unsupported network value returns an error (only 'base' and 'ethereum' are supported)
- Payment failure or insufficient USDC balance results in a 402 response with no data
- Network RPC outage may cause delayed or failed block number retrieval
- Stale data if upstream node is lagging behind chain tip
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"status": "ready"
}
}Tags
x402
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