# SignalHarness Search Query Normalizer

> SignalHarness Search Query Normalizer 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).

Normalizes and standardizes a raw search query string into a canonical, structured form suitable for downstream search or lookup operations.

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/search_query_normalize/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-search-query-normalizer-9d223fe7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jHA0Qa_Cv2ALHuBMOalA3

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-search-query-normalizer-9d223fe7 -d '<json body>'
```

Example prompt: Can you normalize this search query for me — 'best cheap laptops under 500 dollars NYC' — so it's clean and standardized before I pass it to the search index?

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-call query normalization step in an agent pipeline before sending user input to a search or lookup service. It is especially useful when query strings come from untrusted or varied user input and need to be canonicalized cheaply ($0.005 USDC) without standing up your own NLP preprocessing infrastructure.

## Known failure modes

- Malformed or empty request_json returns a validation error
- Input exceeding 65536 characters is rejected
- Caller-supplied data warnings issued when input cannot be fully verified
- Payment failure on Base network results in no execution
- Ambiguous or nonsensical queries may produce low-confidence normalizations

## 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 a normalized/analyzed version of the input query as analysis_json, along with any warnings (e.g. about caller-supplied data reliability), the service_id, and a full receipt with payment confirmation, latency, and result hash for auditability.

## 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": "search_query_normalize",
   "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": "search_query_normalize",
   "executionId": "example-execution",
   "startedAtMs": 0,
   "amountAtomic": "5000",
   "resultSha256": "bc0a292a87cd2dfe76e2753df737da2803924d093c2002c2de20e9ef9583b1a8",
   "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-search-query-normalizer-9d223fe7/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)