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SignalHarness ABI Function Decode
x402
SignalHarness ABI Function Decode is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Decodes a raw ABI-encoded Ethereum function call into a human-readable representation, including warnings about the decoded data.
Price / call$0.01
Success—
StatusUnknown
How this service works
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Output
Returns a JSON object containing the decoded function call (function name and parameter values), any warnings about the data, the evidence scope indicating how the data was interpreted, plus a full receipt with payment confirmation, latency, result hash, and execution metadata.
Example use cases
Decoding suspicious transaction calldata
“I just saw a suspicious Ethereum transaction and want to know what function it called and with what arguments — here's the raw input data: 0x23b872dd000000000000000000000000abc...def0000000000000000000000000000000000000000000000000000000000000064. Can you decode it?”
Smart contract audit helper
“I'm auditing a smart contract interaction and need to decode this ABI-encoded calldata to verify the function and parameters being passed: 0x095ea7b3000000000000000000000000uniswap_router00000000000000000000000000000000000000000000003635c9adc5dea00000”
DeFi transaction debugging
“My DeFi transaction failed and I want to understand what function was being called. Can you decode this transaction input for me: 0x38ed173900000000000000000000000000000000000000000000000002c68af0bb140000?”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/abi_function_decode/invokeWhen to prefer
Choose this endpoint when you need to decode raw Ethereum ABI-encoded function calldata into a human-readable form, especially within an agent workflow that already uses x402 micropayments. It is particularly useful for blockchain analytics, transaction auditing, smart contract debugging, or any scenario where you need to interpret raw on-chain input data programmatically at low per-call cost ($0.01 USDC).
Side effects
- Invalid or malformed ABI-encoded data returns an error or warnings in the warnings array
- Calldata that doesn't match any known ABI signature may return partial or ambiguous decode results
- Input too long (>65536 characters) will be rejected by schema validation
- Malformed hex strings or non-ABI data will fail to decode cleanly
- Payment failure via x402 protocol will prevent execution
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| abi_function_decode_request | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"warnings": [
"Decoded values reflect only the supplied ABI and bytes."
],
"service_id": "abi_function_decode",
"evidence_scope": "caller_supplied_data",
"decoded_function_call": "{\"args\":[\"0x0000000000000000000000000000000000000001\"],\"functionName\":\"balanceOf\"}"
},
"status": "succeeded",
"receipt": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"usage": [],
"status": "succeeded",
"network": "eip155:8453",
"artifacts": [],
"endedAtMs": 0,
"latencyMs": 0,
"paymentId": "example-payment",
"receiptId": "example-receipt",
"requestId": "example-request",
"serviceId": "abi_function_decode",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "10000",
"resultSha256": "c2309aa284a0852faed303b6b747a5d28e909d8a17831406be457670166f7988",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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