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Block Number by Timestamp
x402
Block Number by Timestamp is a paid API for AI agents from stablecrypto.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Returns the closest blockchain block number (height) to a given Unix timestamp for a specified chain
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-request access to CoinGecko, DefiLlama, Alchemy, and Etherscan APIs. No auth, no subscriptions.
Output
Returns a JSON object with the block height (block number) and the actual timestamp of that block on the specified chain, using DefiLlama's block index.
Example use cases
Example prompt
“What was the closest Ethereum block number to Unix timestamp 1700000000?”
Technical details
Endpoint
POSThttps://stablecrypto.dev/api/defillama/coins/blockWhen to prefer
Use this endpoint when you need to anchor a historical on-chain query to a specific point in time — for example, looking up token prices, balances, or DeFi protocol state at a particular timestamp. Prefer this over RPC-based alternatives when you need a quick, multi-chain lookup without managing your own node.
Side effects
- Invalid chain name returns an error or empty result
- Timestamp far in the future or before genesis block may return no result
- Network timeouts or DefiLlama API downtime result in HTTP 5xx
- Missing required fields (chain or timestamp) return a validation error
Input
{
"chain": "ethereum",
"timestamp": 1700000000
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | Chain name (e.g. "ethereum") |
| timestamp | number | Unix timestamp |
Output
{
"height": 18573051,
"timestamp": 1700000003
}Tags
x402
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