# SignalHarness RAG Answer Quality Report

> SignalHarness RAG Answer Quality Report is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Analyzes and scores the quality of answers produced by a RAG (Retrieval-Augmented Generation) pipeline, returning a structured quality report with warnings and evidence scope.

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/rag_answer_quality_report/invoke
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signalharness-rag-answer-quality-report-15c4e093
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_m2LIl17UJ632i68qzzuY5

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-rag-answer-quality-report-15c4e093 -d '<json body>'
```

Example prompt: Can you run a RAG answer quality report on this query-answer-context bundle I have — I want to know if the answer is well-grounded in the retrieved passages and whether there are any quality issues I should be aware of?

## When to prefer this

Choose this endpoint when you need a programmatic, per-call quality assessment of RAG pipeline outputs — especially when you want a structured JSON report with explicit warnings and evidence scope. Prefer it over manual review or generic LLM prompting when you need reproducible, receipt-backed evaluations at $0.05 per call via USDC on Base.

## Known failure modes

- Malformed or invalid request_json payload returns an error
- request_json exceeds 65536 character limit
- Missing required fields in request_json cause processing failure
- Payment failure over x402 protocol prevents execution
- Low-quality or ambiguous input data may produce unreliable quality scores (warned via warnings array)

## 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 the quality assessment, a list of warnings (e.g. about caller-supplied data reliability), and an evidence_scope field indicating whether the evaluation is based on caller-supplied data. Also includes a full execution receipt with payment and timing metadata.

## 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": "rag_answer_quality_report",
   "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": "rag_answer_quality_report",
   "executionId": "example-execution",
   "startedAtMs": 0,
   "amountAtomic": "50000",
   "resultSha256": "d1161a5c9c3281fcf87abb52fb32c8196aa74b487b574c62e55c782623f5b4ce",
   "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-rag-answer-quality-report-15c4e093/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)