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EVM Block Number Lookup
x402
EVM Block Number Lookup is a paid API for AI agents from built-with-productos-xszv.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).
Returns the current block number for a specified EVM-compatible blockchain network (Ethereum, Base, Arbitrum, or Polygon)
Price / call$0.001
Success—
StatusUnknown
How this service works
Global current weather, hourly forecasts, foreign-exchange rates, EVM reads, and deterministic utilities for AI agents. Pay per call with MPP or x402; no API key.
Output
A JSON object containing the current block number as both a hex string and a decimal integer, along with the queried network name. Example: {"hex": "0x20f85d2", "network": "base", "block_number": 34567890}
Example use cases
Monitor Ethereum block progression
“Keep checking the current block number on Ethereum every minute and let me know when it crosses block 21000000.”
Confirm Base chain liveness
“Can you quickly grab the latest block number on Base to confirm the chain is still producing blocks?”
Arbitrum block height for timestamp estimation
“What's the current block number on Arbitrum? I need it to estimate when a transaction from about 100 blocks ago was confirmed.”
Technical details
Endpoint
GEThttps://built-with-productos-xszv.vercel.app/v1/block-number?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, pay-per-call EVM block number lookup without setting up API keys or managing rate limits. Ideal for agents that need occasional chain-height checks across Ethereum, Base, Arbitrum, or Polygon without committing to a full Web3 node provider subscription. Best for lightweight monitoring, timestamp estimation, and liveness checks rather than high-frequency indexing.
Side effects
- Invalid or unsupported network name returns an error — only 'ethereum', 'base', 'arbitrum', 'polygon' are accepted
- Payment not provided or insufficient USDC triggers a 402 Payment Required response
- Network RPC unavailability may cause delayed or failed responses
- Malformed query parameters result in schema validation errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"hex": "0x20f85d2",
"network": "base",
"block_number": 34567890
}
}Tags
x402
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