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SperaxOS Internal Transactions Lookup
x402
SperaxOS Internal Transactions Lookup is a paid API for AI agents from chat.sperax.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-16).
Retrieves internal (trace-level) transactions for a given wallet or contract address on EVM-compatible chains
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
A list of internal transactions (traces) for the specified address on the chosen EVM chain, including details such as calling contract addresses, value transferred, block numbers, and call type — up to the specified limit and bounded by the optional start/end block range.
Example use cases
DeFi contract call audit
“Pull up all internal transactions for the Uniswap V3 contract 0x1F98431c8aD98523631AE4a59f267346ea31F984 on Ethereum, up to 30 results, so I can audit which contracts it called internally.”
Wallet internal transfer history
“Show me the internal transactions for my wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base between block 5000000 and 6000000, limit 20.”
Cross-chain internal tx comparison
“Get the last 20 internal transactions for address 0x742d35Cc6634C0532925a3b844Bc454e4438f44e on Polygon so I can see what smart contract calls happened under the hood.”
Technical details
Endpoint
POSThttps://chat.sperax.io/api/x402/tools/internal-txs/getInternalTxs?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to inspect internal (trace-level) transaction activity — i.e. contract-to-contract calls and ETH transfers that don't appear as top-level transactions — for a specific address across major EVM chains including Ethereum, Arbitrum, Polygon, Optimism, and Base. Prefer this over external transaction endpoints when you need to understand what happened beneath the surface of a transaction, such as internal calls made by DeFi protocols or value flows within a smart contract. It's pay-per-request with no API key required, making it ideal for agents needing on-demand blockchain tracing without upfront credential setup.
Side effects
- Invalid or malformed wallet/contract address returns an error
- Unsupported chain name returns a validation error
- Start block greater than end block returns empty results or an error
- No internal transactions found in the given block range returns an empty list
- Rate limiting or payment failure via x402 protocol results in a 402 Payment Required response
- Extremely wide block ranges with high activity may time out or be truncated
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | Chain: ethereum, arbitrum, polygon, optimism, base |
| limit | number | Max results (default 20) |
| address | string | Wallet or contract address |
| endBlock | number | End block number |
| startBlock | number | Start block number |
Tags
x402
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