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Agent Chain Kit – EVM Block Number
x402
Agent Chain Kit – EVM Block Number is a paid API for AI agents from built-with-productos-voo8.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Returns the current block number for a specified EVM-compatible network (Ethereum, Base, Arbitrum, or Polygon) with multi-RPC failover.
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-call EVM utility API for AI agents and automation.
Output
A JSON object containing the current block number as a decimal integer (`block_number`), the same value in hexadecimal (`hex`), and the `network` name that was queried. Example: {"hex":"0x20f85d2","network":"base","block_number":34567890}.
Example use cases
Smart contract deployment timing check
“What's the current Ethereum block number? I want to make sure my contract deployment window hasn't passed yet.”
On-chain automation trigger
“Keep checking the current block number on Arbitrum and let me know when it hits 200000000 so I can trigger my script.”
Multi-chain block height comparison
“Can you grab the current block numbers for Base and Polygon so I can compare how fast each chain is moving?”
Technical details
Endpoint
GEThttps://built-with-productos-voo8.vercel.app/v1/block-numberWhen to prefer
Choose this endpoint when you need a reliable, pay-per-call EVM block number lookup with multi-RPC failover across Ethereum, Base, Arbitrum, or Polygon — especially in agent or automation workflows where uptime is critical and you don't want to manage your own RPC node. Prefer it over self-hosted RPC calls when simplicity, failover resilience, and low per-call cost ($0.001 USDC) matter more than maintaining your own infrastructure.
Side effects
- Network not supported — only ethereum, base, arbitrum, polygon are valid enum values
- All RPC endpoints for the selected network are unavailable (multi-RPC failover exhausted)
- Payment failure — missing or invalid x402 payment header results in 402 response
- Rate limiting or upstream RPC timeout causing delayed or failed response
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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