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Block by Timestamp – x402node
x402
Block by Timestamp – x402node is a paid API for AI agents from api.x402node.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Returns the block number closest to a given Unix timestamp on a specified blockchain, enabling historical on-chain queries without manual binary search.
Price / call$0.005
Success—
StatusUnknown
How this service works
Block height closest to a given unix timestamp on a chain, a primitive for historical on-chain queries. Saves agents a binary search over block times. Live block lookup. block by timestamp, block at time, historical block, archive query helper, chain block Accepts payment on Base or Solana — either network works.
Output
Returns the block number (height) on the specified chain that is closest to the provided Unix timestamp, along with the actual block timestamp for verification — saving the caller from performing a binary search over block times.
Example use cases
Example prompt
“What was the closest Ethereum block to January 1st 2024 at midnight UTC? Give me the block number so I can use it for a historical on-chain snapshot.”
Technical details
Endpoint
GEThttps://api.x402node.dev/prices/blockWhen to prefer
Use this endpoint when you need to anchor a historical on-chain query (e.g. token balances, prices, liquidity) to a specific moment in time and need the corresponding block number. It eliminates the need to implement and run a binary search over block timestamps yourself. Prefer this over manually querying RPC endpoints when you want a quick, single-call resolution of timestamp-to-block without maintaining archive node access.
Side effects
- Invalid or unsupported chain identifier returns an error
- Unix timestamp out of range (before genesis or in the future) returns an error
- Missing required parameters return a 400-level error
- Payment not fulfilled or insufficient USDC balance returns a 402 error
- Archive node unavailable for the requested chain may return a 503
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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