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Financial Data x402 – Block by Timestamp
x402
Financial Data x402 – Block by Timestamp is a paid API for AI agents from x402financialdata.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Returns the Ethereum block number closest to a given Unix timestamp, paid per-call via USDC over the x402 protocol.
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-call stock, macro, on-chain, and crypto data over the x402 protocol. USDC on Base or Solana, no API keys, no subscriptions.
Output
Returns a JSON object with the chain name ('eth'), the closest direction used ('before' or 'after'), the requested Unix timestamp, and the resolved Ethereum block number as an integer (e.g. {"chain":"eth","closest":"before","timestamp":1780000000,"block_number":25196227}).
Example use cases
Historical on-chain event anchoring
“I need to find the Ethereum block number that was mined just before Unix timestamp 1700000000 so I can anchor a historical token price query to the right block.”
Smart contract state at specific moment
“What was the closest Ethereum block after Unix timestamp 1672531200? I want to query a smart contract's state at exactly that point in time.”
DeFi protocol audit at known date
“Give me the Ethereum block number closest to Unix timestamp 1609459200 — I need the block just before that time for a DeFi protocol audit.”
Technical details
Endpoint
GEThttps://x402financialdata.com/block-by-timestampWhen to prefer
Choose this endpoint when you need to map a specific Unix timestamp to an Ethereum block number without signing up for an API key or subscription — ideal for agents that need pay-as-you-go on-chain historical lookups, smart contract state queries anchored to a moment in time, or DeFi data pipelines that bill per-call via USDC over x402.
Side effects
- Missing required 'timestamp' query parameter returns an error
- Unsupported chain value (only 'eth' is supported) returns a validation error
- Future timestamp with no mined blocks yet may return an error or unexpected result
- Payment failure or insufficient USDC balance causes x402 payment rejection
- Invalid 'closest' enum value (not 'before' or 'after') returns a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "eth",
"closest": "before",
"timestamp": 1780000000,
"block_number": 25196227
}
}Tags
x402
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