# SignalHarness Model Output Disagreement Extract

> SignalHarness Model Output Disagreement Extract is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Extracts and analyzes disagreements or inconsistencies between multiple AI model outputs from caller-supplied JSON data

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/model_output_disagreement_extract/invoke
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signalharness-model-output-disagreement-extract-8ea65026
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gHdBpUX1tytp8TFmtNaFe

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-model-output-disagreement-extract-8ea65026 -d '<json body>'
```

Example prompt: I ran the same question through three different LLMs and got different answers — can you extract and summarize where they disagree? Here's the JSON with all their outputs: {"models":[{"name":"gpt-4","answer":"Paris"},{"name":"claude-3","answer":"London"},{"name":"gemini","answer":"Paris"}]}

## When to prefer this

Choose this endpoint when you need to programmatically identify and extract points of disagreement across multiple AI model outputs in a structured way, especially when you have JSON-formatted model responses ready. Prefer this over manual comparison or generic text-diff tools when the goal is AI-specific output analysis with structured JSON results and an auditable payment receipt.

## Known failure modes

- Malformed or non-JSON request_json input returns a parsing error
- Input JSON exceeding 65536 characters is rejected
- Empty or too-short input (under 2 chars) is rejected
- Ambiguous model output structure may result in low-confidence or empty analysis
- Payment failure via x402 protocol results in 402 response before execution

## 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 JSON object containing an analysis_json field with extracted disagreement data, a list of warnings (e.g. to verify caller-supplied data), an evidence_scope indicating the data came from caller-supplied input, and a receipt with payment and execution metadata including service ID, network, and result hash.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "replay": false,
  "result": {
   "warnings": [
    "Verify the caller-supplied data before relying on this result."
   ],
   "service_id": "model_output_disagreement_extract",
   "analysis_json": "{\"example\":\"schema-valid caller-supplied data\"}",
   "evidence_scope": "caller_supplied_data"
  },
  "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": "model_output_disagreement_extract",
   "executionId": "example-execution",
   "startedAtMs": 0,
   "amountAtomic": "5000",
   "resultSha256": "4a5be7ca200f82f0f754134223623eeb2bd21c60f4d050586e7c5658d528aac4",
   "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-model-output-disagreement-extract-8ea65026/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)