# LLM Response Instruction Coverage Analyzer

> LLM Response Instruction Coverage Analyzer is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.015/call, status unknown (last checked 2026-09-15).

Analyzes an LLM response JSON to determine how well it covers the instructions provided, identifying gaps and warnings.

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/llm_response_instruction_coverage/invoke
- Price: $0.015/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/llm-response-instruction-coverage-analyzer-58276c4d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cFe_4bd2qXmQ-f5ikatXI

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 llm-response-instruction-coverage-analyzer-58276c4d -d '<json body>'
```

Example prompt: Can you check this LLM response JSON and tell me how well it covered the instructions I gave it — specifically flag any instructions that were missed or only partially addressed?

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-call API to programmatically assess whether an LLM response adequately covers a set of instructions — especially useful in automated QA pipelines, agent monitoring systems, or fine-tuning evaluation loops where you need a structured JSON analysis with auditable receipts.

## Known failure modes

- Invalid or malformed request_json string returns an error
- request_json exceeding 65536 characters is rejected
- Missing required request_json field causes request failure
- Ambiguous or incomplete input data may produce low-confidence analysis with generic warnings
- Payment failure via x402 results in no 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 analysis object containing coverage assessment results, a list of warnings about uncovered or questionable instruction adherence, the evidence scope (caller-supplied data), and the service ID. Wrapped in a standard receipt with payment details, request/execution IDs, a SHA256 result hash, and status information.

## 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": "llm_response_instruction_coverage",
   "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": "llm_response_instruction_coverage",
   "executionId": "example-execution",
   "startedAtMs": 0,
   "amountAtomic": "15000",
   "resultSha256": "81227a74b63c47945c64d1be8aed16b37eff0bc1659472984905a7e0fd2b0a3a",
   "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/llm-response-instruction-coverage-analyzer-58276c4d/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)