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Ethereum Mainnet Latest Block Number
x402
Ethereum Mainnet Latest Block Number is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-29).
Returns the current latest block number on Ethereum mainnet (eip155:1) via a read-only eth_blockNumber call
Price / call$0.001
Success—
StatusUnknown
How this service works
Call when an agent needs the latest Ethereum mainnet block number. Send tag latest, or an empty object. Read-only eth_blockNumber on eip155:1. No spend. Send JSON {"tag":"latest"}. Exact $0.001 USDC on Base. Try unpaid POST /v1/sandbox/eth-block-number first.
Output
Returns the current latest block number on Ethereum mainnet as a numeric value, representing the chain height at the time of the request.
Example use cases
Real-time Ethereum block monitoring
“Keep checking the current Ethereum block number every minute and let me know when it reaches 22000000.”
Smart contract deployment timing
“Before I deploy my contract, what is the current Ethereum mainnet block number so I can record it as a reference point?”
On-chain data synchronization check
“What is the latest Ethereum mainnet block height right now? I need to verify my local node is in sync.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/eth-block-number?utm_source=zero.xyzWhen to prefer
Use this endpoint when an agent needs a quick, cheap, read-only lookup of the current Ethereum mainnet block number without running a full node or maintaining an RPC connection. Ideal for lightweight agents that need periodic chain height checks, synchronization verification, or timestamping on-chain events by block number. At $0.001 USDC per call it is cost-effective for frequent polling. Try the free sandbox endpoint first for testing.
Side effects
- Network or RPC node unavailability returns a 5xx error
- Invalid or non-'latest' tag value returns a 4xx validation error
- Payment failure or insufficient USDC balance returns a 402 Payment Required
- Rate limiting may return a 429 Too Many Requests error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| tag | string | Block tag. Only latest is accepted. Example: latest. Omit it for the same current Ethereum mainnet block number. No address. |
Tags
x402
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