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SignalHarness Search Result Cluster by Domain or Metadata
x402
SignalHarness Search Result Cluster by Domain or Metadata 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).
Clusters and groups API service search results by domain or metadata attributes to help agents discover related services
Price / call$0.01
Success—
StatusUnknown
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 of clustered service results, grouped by domain or metadata attributes, along with warnings about caller-supplied data verification, a service ID, and a signed receipt including payment details, latency, and a SHA-256 result hash.
Example use cases
Discover payment APIs by domain
“Search SignalHarness for all payment-related API services and group them by domain so I can compare what's available in that space.”
Find NLP services by metadata tags
“Look up all natural language processing services on SignalHarness and cluster the results by their metadata attributes so I can see how they differ.”
Explore geospatial tool categories
“I need to explore geospatial and mapping APIs available on SignalHarness — can you search and cluster the results by domain so I understand what categories exist?”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/search_result_cluster_by_domain_or_metadata/invokeWhen to prefer
Choose this endpoint when an agent needs to discover and organize API services from the SignalHarness catalog by domain or metadata grouping rather than receiving a flat list. Prefer it over a generic search when the agent needs to understand the landscape of related services grouped by category, or when comparing service types within a domain. Best for agent orchestration workflows where knowing the shape of available tools matters before selection.
Side effects
- Invalid or malformed request_json may return an error or empty clusters
- Caller-supplied data that fails schema validation may produce unreliable clustering
- Service may return warnings if the input data cannot be fully verified
- Empty result set if no services match the domain or metadata criteria
- Payment failure on Base network may prevent execution
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| request_json | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"warnings": [
"Verify the caller-supplied data before relying on this result."
],
"service_id": "search_result_cluster_by_domain_or_metadata",
"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_cluster_by_domain_or_metadata",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "10000",
"resultSha256": "2795c6b6028051b7046ec288b68ae0302dc429ce073901fd52652b03793166a5",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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