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Blockchain Block Number by Timestamp Lookup
x402
Blockchain Block Number by Timestamp Lookup is a paid API for AI agents from ai-policy-kit.moneymaker-ai.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-19).
Returns the block number (and surrounding block metadata) on a given blockchain that corresponds to a specified timestamp
Price / call$0.002
Success—
StatusUnknown
How this service works
Generate an AI_POLICY.md and a pull request template with an AI-disclosure section for your open-source repo. Free, runs in your browser.
Output
A JSON object containing the resolved block number, chain name, chain ID, the exact UTC time of that block, the next block number and its time, the latest block number at query time, whether the match was exact, and the number of search rounds taken to converge.
Example use cases
DeFi snapshot at specific block
“I need to know which Ethereum block was mined at exactly midnight UTC on January 1 2025 — can you look that up for me?”
Arbitrage replay on BSC
“Find the BSC block number that corresponds to the unix timestamp 1729259633 so I can replay the on-chain state at that moment.”
Cross-chain event alignment
“I'm aligning events across chains — what was the Polygon block number at 2025-06-15T09:00:00Z?”
Technical details
Endpoint
GEThttps://ai-policy-kit.moneymaker-ai.workers.dev/api/block-at-time?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to map a human-readable or programmatic timestamp to a specific block number on a supported EVM-compatible chain (Base, Ethereum, BSC, Arbitrum, Optimism, Polygon, Gnosis, Celo). It is ideal for DeFi analytics, historical state queries, cross-chain event alignment, and smart contract audit workflows where you need precise block-time correspondence without running your own node.
Side effects
- Invalid or unsupported chain name returns an error
- Malformed or out-of-range timestamp causes a 400 error
- Timestamp far in the future may return an estimate rather than an exact block
- Network or upstream node timeout may cause 5xx response
- Missing required query parameters (chain or time) returns a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"block": 128381698,
"chain": "bsc",
"exact": true,
"rounds": 7,
"chainId": 56,
"next_block": 128381699,
"latest_block": 128445498,
"block_time_utc": "2026-10-18T14:53:53.000Z",
"requested_time_utc": "2026-10-18T14:53:53.000Z",
"next_block_time_utc": "2026-10-18T14:53:54.000Z"
}
}Tags
x402
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