# SignalHarness Search Result Source Diversity Analyzer

> SignalHarness Search Result Source Diversity Analyzer is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Analyzes a set of search results to evaluate how diverse the underlying sources are, returning a diversity assessment with supporting evidence.

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/search_result_source_diversity/invoke
- Price: $0.01/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-source-diversity-analyzer-c7ca6717
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Kg53L8J91zP1mlY0uP4Ol

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-source-diversity-analyzer-c7ca6717 -d '<json body>'
```

Example prompt: Can you analyze these search results I got back and tell me how diverse the sources are — like, are they all from the same few domains or do they actually cover a wide range of publishers?

## When to prefer this

Use this endpoint when you need a quick, pay-per-call programmatic assessment of source diversity in a set of search results without building your own diversity-scoring logic. It is well-suited for agents that aggregate search results and want to flag echo-chamber risk or validate breadth of coverage before surfacing results to users. Prefer this over manual domain-counting when you need a structured JSON response with a consistent evidence scope label.

## Known failure modes

- Malformed or non-JSON request_json input returns a validation error
- Empty or minimal result sets may produce low-confidence diversity scores
- Caller-supplied data is not independently verified by the service, so results reflect only what was submitted
- Payment failure over x402 protocol will prevent execution
- Excessively large payloads exceeding 65536 characters will be rejected

## 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 a diversity assessment of the provided search results, along with any warnings about data reliability. The result includes an analysis_json field with the computed diversity metrics, an evidence_scope indicator (caller_supplied_data), and a warnings array noting that caller-supplied data should be independently verified. A receipt is also returned confirming the payment and execution details.

## 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_source_diversity",
   "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_source_diversity",
   "executionId": "example-execution",
   "startedAtMs": 0,
   "amountAtomic": "10000",
   "resultSha256": "56e6f9f51e0d1c0332867d3f83eb1e20bd741b5485797bd636ecdb5efc039fc9",
   "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-source-diversity-analyzer-c7ca6717/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)