# SignalHarness Search Result Overlap Compare

> SignalHarness Search Result Overlap Compare 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).

Compares two sets of search results to identify overlapping items, shared URLs, or duplicate entries across queries

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/search_result_overlap_compare/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/signalharness-search-result-overlap-compare-78d2d062
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kwntoMCHwrh4UwPsUSK9j

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-overlap-compare-78d2d062 -d '<json body>'
```

Example prompt: Compare these two sets of search results for me and tell me which URLs or items appear in both — I want to know the overlap between my query for 'best running shoes' and my query for 'top athletic footwear'.

## When to prefer this

Use this endpoint when you need to programmatically compare two search result sets and identify shared or overlapping entries. Prefer this over manual deduplication when dealing with structured search result JSON from any source. Best suited for SEO analysis, research aggregation, or any workflow where understanding the intersection of two query result sets is valuable.

## Known failure modes

- Invalid or malformed JSON in request_json field causes processing failure
- Empty or too-short input (below minLength of 2) rejected
- Oversized input exceeding 65536 character limit returns error
- Misformatted search result structure yields incomplete analysis
- Caller-supplied data not verified — results depend entirely on input quality

## 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 containing the overlapping items found between two search result sets, including matched entries, intersection metrics, and any warnings about data quality. The result includes a service_id, analysis_json with the comparison details, and an evidence_scope indicator.

## 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_overlap_compare",
   "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_overlap_compare",
   "executionId": "example-execution",
   "startedAtMs": 0,
   "amountAtomic": "15000",
   "resultSha256": "8b8e6905287b63b3d71202536f19144e6c5080a18a547d13451f6dc0825c259d",
   "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-overlap-compare-78d2d062/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)