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SperaxOS Etherscan Data API (x402)
x402
SperaxOS Etherscan Data API (x402) is a paid API for AI agents from chat.sperax.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-23).
Retrieves on-chain Ethereum data via Etherscan, payable per-request with USDC on Base using the x402 protocol — no API key required.
Price / call$0.001
Success—
StatusUnknown
How this service works
AI-powered DeFi intelligence APIs payable via the x402 HTTP payment protocol. No API key required — pay per request with USDC on Base. Identity-only (SIWX) endpoints are free for wallets with an agentcash identity.
Output
Returns Etherscan on-chain data such as transaction lists, token balances, contract events, or block information for the queried Ethereum address or entity, delivered as structured JSON.
Example use cases
Wallet transaction history audit
“Get me all the transactions for Ethereum wallet 0xAbC...123 from Etherscan so I can see what moved in and out over the past month.”
Token balance snapshot for DeFi portfolio
“Look up the current ERC-20 token balances held by 0xDef...456 on Ethereum — I want to know what tokens they're holding right now.”
Smart contract event inspection
“Fetch the recent event logs for smart contract 0x789...GHI on Ethereum — I'm trying to track all the Swap events emitted in the last 500 blocks.”
Technical details
Endpoint
GEThttps://chat.sperax.io/api/x402/v1/data/etherscan?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need trustless, pay-per-request access to Etherscan data without managing API keys, especially useful for AI agents operating autonomously with a crypto wallet on Base. Ideal for on-demand Ethereum on-chain lookups in DeFi workflows where microtransaction payment (x402) is already supported.
Side effects
- Invalid Ethereum address format returns an error
- Payment of 0.001 USDC via x402 not included causes 402 Payment Required response
- Etherscan rate limits or downtime may cause upstream errors
- Querying a non-existent transaction hash returns empty or not-found result
- Missing required query parameters returns a 400-level error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| required | string | |
| properties | string |
Tags
x402
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