# SignalHarness RAG Context Coverage Report

> SignalHarness RAG Context Coverage Report is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.025/call, status unknown (last checked 2026-09-15).

Analyzes a caller-supplied JSON payload to generate a coverage report assessing how well RAG (Retrieval-Augmented Generation) context is represented across a given dataset or query set.

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/rag_context_coverage_report/invoke
- Price: $0.025/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-context-coverage-report-2a707222
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VsGy2w-U9NHd_Gdqm7ff3

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-context-coverage-report-2a707222 -d '<json body>'
```

Example prompt: Run a RAG context coverage report on this retrieval dataset — here's the JSON with my query list and retrieved context chunks — and tell me where the gaps are and how well covered each topic is.

## When to prefer this

Choose this endpoint when you need a structured, automated audit of RAG retrieval coverage and want a machine-readable report rather than a manual review. It is especially useful when you have a well-formed JSON payload of queries and retrieved context ready to submit and need a fast, per-call diagnostic without committing to a recurring service. Prefer this over general LLM-based analysis when you want a consistent, receipted, verifiable output with a SHA-256 result hash.

## Known failure modes

- Invalid or malformed request_json causes a parsing error
- request_json shorter than 2 characters or exceeding 65536 characters triggers a validation error
- Caller-supplied data that doesn't conform to expected RAG schema may produce low-confidence or empty analysis
- Payment failure on the x402 protocol results in no execution
- Network or service timeout yields no result

## 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 coverage assessment, a list of warnings about data reliability, an evidence_scope label indicating the data was caller-supplied, and a full execution receipt including payment details, latency, and a SHA-256 hash of the result for verification.

## 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_context_coverage_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_context_coverage_report",
   "executionId": "example-execution",
   "startedAtMs": 0,
   "amountAtomic": "25000",
   "resultSha256": "00e45edd7a4b1e3381d57f8fd589a60967262984626fe627bbcfe494749a3395",
   "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-context-coverage-report-2a707222/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)