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PennyRail EVM Block Number Lookup
x402
PennyRail EVM Block Number Lookup is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Returns the current block number of an EVM-compatible blockchain chain via a paid x402 micro-settlement endpoint
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-readable settlement service
Output
Returns the current block number (block height) of the specified EVM-compatible blockchain network as a numeric value, representing how many blocks have been produced on that chain up to the moment of the request.
Example use cases
On-chain sync checkpoint for dApp
“What is the current block number on Ethereum mainnet? I need it to checkpoint my sync process.”
Monitor block progression on L2
“Can you grab the latest block number on Polygon so I can check how far behind my indexer is?”
Verify confirmation depth for transaction
“I just sent a transaction on Arbitrum — what is the current block number so I can calculate how many confirmations it has?”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/p/nano/chain.block-number--evm-block-numberWhen to prefer
Use this endpoint when you need a quick, pay-per-call lookup of the current EVM block number without managing your own RPC node infrastructure. Ideal for agents that need occasional chain height checks without a persistent Web3 provider setup. Prefer over free RPC endpoints when reliability and micro-payment settlement via x402 are acceptable trade-offs.
Side effects
- Unsupported or unrecognized EVM chain identifier returns an error or empty response
- Network connectivity issues to the target chain node result in a timeout or 5xx error
- Payment of $0.001 USDC not fulfilled via x402 protocol causes a 402 Payment Required response
- Malformed input object causes validation failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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