# SignalHarness Search Result Domain Group

> SignalHarness Search Result Domain Group is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Groups and organizes API service search results by domain on the SignalHarness agent-native marketplace

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/search_result_domain_group/invoke
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signalharness-search-result-domain-group-29dd8d7a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vkSS_HF47ih0I-oEEAc1r

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-result-domain-group-29dd8d7a -d '<json body>'
```

Example prompt: Search the SignalHarness marketplace for agent-native API services related to weather data and group the results by domain so I can see which categories have the most options.

## When to prefer this

Use this endpoint when you need to discover and browse SignalHarness API services organized by domain category, especially when you want to understand the landscape of available services across different domains rather than retrieving a flat list. Prefer it over generic search endpoints when the grouping-by-domain output format is specifically needed for navigation or comparison tasks.

## Known failure modes

- Invalid or malformed request_json input returns a parsing error
- Empty or missing request_json may cause validation failure
- Overly broad queries may return empty domain groups
- Rate limiting or payment failure may prevent execution
- Backend service unavailability returns a failed status in the receipt

## 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 grouped search results organized by domain, along with an analysis_json field with structured result data, status of the execution, a cryptographic receipt with payment details and result hash, and any warnings about caller-supplied data reliability.

## 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_result_domain_group",
   "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_result_domain_group",
   "executionId": "example-execution",
   "startedAtMs": 0,
   "amountAtomic": "10000",
   "resultSha256": "1ddf09893ddd3700f4e0091b914a554d4d8e02142133089b15b9a410b490615d",
   "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-result-domain-group-29dd8d7a/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)