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SperaxOS Internal Transactions by Hash
x402
SperaxOS Internal Transactions by Hash is a paid API for AI agents from chat.sperax.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-20).
Retrieves internal transactions (sub-calls) for a given transaction hash on a specified blockchain
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/sub-calls) associated with the given transaction hash, including details such as the from/to addresses, value transferred, function calls, call type, gas usage, and any nested contract interactions that occurred within the parent transaction.
Example use cases
Trace DeFi swap internal flows
“I just saw this transaction on Uniswap — hash is 0xabc123...def456 on Ethereum — can you show me all the internal calls and token movements that happened inside it?”
Debug failed smart contract call
“My smart contract transaction 0x7f8e...1234 on Ethereum seems to have reverted somewhere internally — can you fetch the internal transactions so I can see exactly which sub-call failed?”
Audit internal ETH transfers in a transaction
“For compliance purposes I need all the internal ETH transfers that occurred within transaction 0xdeadbeef...cafe on Ethereum — can you retrieve the full internal tx breakdown?”
Technical details
Endpoint
POSThttps://chat.sperax.io/api/x402/tools/internal-txs/getInternalTxsByHash?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to inspect the internal sub-calls and value transfers within a specific blockchain transaction — especially for DeFi transactions involving multiple contract interactions. Prefer this over a simple transaction lookup when the top-level tx data is insufficient and you need full execution trace detail. Best suited for Ethereum and other EVM-compatible chains supported by SperaxOS.
Side effects
- Invalid or malformed transaction hash returns an error
- Unsupported chain name returns an error or empty result
- Transaction hash not found on the specified chain returns empty or 404
- Network timeouts for deeply nested or complex transactions
- Payment failure via x402 if insufficient USDC balance
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | Chain |
| txHash | string | Transaction hash |
Tags
x402
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