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Block By Timestamp
x402
Block By Timestamp is a paid API for AI agents from www.x402financialdata.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Returns the nearest Ethereum block number for a given Unix timestamp, anchoring a point in time to a specific on-chain block for historical state lookups.
Price / call$0.01
Success—
StatusUnknown
How this service works
Nearest Ethereum block number to a given Unix timestamp, from Etherscan's V2 API -- anchors a point in time to a specific block for historical on-chain lookups (e.g. state as of a given date). Not address-specific. $0.01/call.
Output
Returns the Ethereum block number nearest to the requested Unix timestamp, along with whether it is the block immediately before or after that timestamp, enabling precise historical on-chain lookups tied to a real-world point in time.
Example use cases
Historical token balance snapshot
“I need to know what Ethereum block was active right before the start of 2024 — specifically the block just before Unix timestamp 1704067200 — so I can query a token contract's historical state at that exact moment.”
DeFi protocol audit at a past date
“What Ethereum block number corresponds to right before the Uniswap exploit on April 18, 2023 at 14:00 UTC (Unix timestamp 1681826400)? I want to anchor my on-chain audit to that block.”
NFT snapshot for airdrop eligibility
“Find me the closest Ethereum block before Unix timestamp 1680307200 — that's April 1, 2023 at midnight UTC — so I can check wallet holdings at that point in time for an airdrop eligibility snapshot.”
Technical details
Endpoint
GEThttps://www.x402financialdata.com/block-by-timestampWhen to prefer
Use this endpoint when you need to pin a specific date or time to an Ethereum block number before making historical on-chain queries — such as reading past contract state, checking historical balances, or auditing DeFi protocol activity at a precise moment. It is the right choice when time-based block anchoring is required rather than querying the latest block or a known block number directly.
Side effects
- Invalid or future Unix timestamp returns an error or unexpected result
- Unsupported chain value (anything other than 'eth') returns a validation error
- Missing required timestamp parameter returns a 400-level error
- Etherscan API rate limits or downtime may cause upstream failures
- Very early timestamps (pre-Ethereum genesis) may not resolve to a valid block
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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