# SignalHarness ABI Result Decoder

> SignalHarness ABI Result Decoder is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Decodes raw ABI-encoded Ethereum smart contract function call results into human-readable structured data

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/abi_result_decode/invoke
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signalharness-abi-result-decoder-c09d5a14
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QwZ_zM1unN_uqY5uLX0_-

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability signalharness-abi-result-decoder-c09d5a14 -d '<json body>'
```

Example prompt: I just got this raw ABI-encoded result back from an Ethereum smart contract call and I need it decoded into readable values — can you run it through the SignalHarness ABI result decoder? Here's the encoded string: 0x00000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000003

## When to prefer this

Choose this endpoint when you need to programmatically decode raw ABI-encoded Ethereum smart contract return values within an agent workflow, especially when you want a paid, auditable service with cryptographic receipts and SHA256 result verification. Prefer this over manual ABI parsing libraries when you need a hosted, payment-gated API with traceability on the Base network.

## Known failure modes

- Malformed or invalid ABI-encoded input string returns a decoding error
- Input exceeds 65536 character maximum length
- Input shorter than 2 characters minimum
- Ambiguous ABI type information may produce warnings rather than a clean decode
- Payment failure on Base network prevents execution
- Unsupported ABI encoding variants may not decode correctly

## How this service works

Explore 330 pay-per-call x402 API services and 27 agent-native digital products, with Base USDC pricing, secure Polar checkout, and free discovery.

## Output

Returns a structured JSON object containing the decoded function result as a human-readable value, any warnings encountered during decoding, the evidence scope indicating data provenance (caller_supplied_data), and the service ID. Also includes a full receipt with payment details, request/execution IDs, latency metrics, result SHA256 hash, and settlement reference on the Base network.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "abi_result_decode_request": {
   "type": "string",
   "maxLength": 65536,
   "minLength": 2
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "replay": false,
  "result": {
   "warnings": [
    "Decoded values do not prove that a call occurred or succeeded."
   ],
   "service_id": "abi_result_decode",
   "evidence_scope": "caller_supplied_data",
   "decoded_function_result": "\"5\""
  },
  "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_result_decode",
   "executionId": "example-execution",
   "startedAtMs": 0,
   "amountAtomic": "10000",
   "resultSha256": "7806f0ca2eb9edbb73a92108c17d49e803730afacbcdf2e494c34a627084a74b",
   "serviceVersion": "1.0.0",
   "settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
  },
  "artifacts": [],
  "requestId": "example-request",
  "executionId": "example-execution"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signalharness-abi-result-decoder-c09d5a14/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from signalharness.ai](https://www.zero.xyz/host/signalharness.ai/llms.txt)