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MoneyTools Block-at-Time
x402
MoneyTools Block-at-Time is a paid API for AI agents from tools.moneytools.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-11-05).
Returns the last EVM block number at or before a given timestamp on any of 7 supported chains using interpolation search.
Price / call$0.001
Success—
StatusUnknown
How this service works
Block number at a timestamp: Find the last block at or before a date/time on any of 7 EVM chains (interpolation search). For historical balance queries, snapshots and log ranges. Free tier 10/day; then $0.001 via x402 (HTTP 402 + PAYMENT-REQUIRED) or X-API-Key credits. Not charged on failure. $0.001 USDC per call via x402 on Base. Run by MoneyTools.
Output
A JSON object containing the block number corresponding to the requested timestamp on the specified EVM chain, along with payment metadata (whether a charge was made, the network, USD amount, and transaction hash if applicable) and optional plan/partner hints.
Example use cases
Historical token balance snapshot
“I need to check a wallet's token balance as of exactly midnight UTC on March 15 2024 on Ethereum — what block number should I use for that snapshot?”
DeFi event log range query
“I'm querying Arbitrum event logs between November 1 2023 and December 1 2023 — can you give me the starting and ending block numbers for those two timestamps?”
Polygon governance proposal timing
“A Polygon governance vote closed at 2024-06-30T18:00:00Z — what was the last block at or before that moment so I can verify on-chain state at the cutoff?”
Technical details
Endpoint
GEThttps://tools.moneytools.dev/v1/block-at-time?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to map a human-readable or unix timestamp to an EVM block number for historical on-chain queries, balance snapshots, or log range boundaries across any of the 7 supported chains (Base, Ethereum, Arbitrum, Optimism, Polygon, BSC, Avalanche). It is preferable to manual binary-search approaches or chain-specific RPC hacks because it uses interpolation search for speed and covers multiple chains in a single unified API. The free tier of 10 calls/day makes it cost-effective for low-volume use; micropayment via x402 or API key credits covers higher-volume needs at $0.001 per call.
Side effects
- Unsupported chain name returns an error — only base, ethereum, arbitrum, optimism, polygon, bsc, and avalanche are valid
- Malformed or unparseable timestamp (neither valid ISO 8601 nor unix seconds) returns a parse error
- Free tier exhausted (10 calls/day) without payment credentials returns HTTP 402 PAYMENT-REQUIRED
- Network or RPC errors for the target chain may cause lookup failures — not charged on failure
- Future timestamps may return the latest known block or an error depending on implementation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json"
}Tags
x402
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