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SignalHarness Search Result Keyword Rank
x402
SignalHarness Search Result Keyword Rank is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Returns the search engine ranking position of a specified keyword for a given URL or domain.
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 result containing the keyword's current search engine rank position for the specified domain or URL, along with any warnings about caller-supplied data accuracy. The response includes a service receipt with payment metadata, execution timing, and a result SHA256 for verification.
Example use cases
SEO campaign keyword tracking
“What rank does my website example.com currently hold for the keyword 'affordable web hosting' in search results?”
Competitor SERP position check
“Find out where competitor.com ranks for the keyword 'AI automation tools' — I want to see if they're on the first page.”
Content performance monitoring
“Check the current search ranking position of myblog.com for the keyword 'remote work productivity tips' so I can see if my recent article is gaining traction.”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/search_result_keyword_rank/invokeWhen to prefer
Choose this endpoint when you need a pay-per-call, agent-native keyword rank lookup without a subscription — ideal for AI agents that need occasional SERP position checks billed in USDC on Base. Prefer this over subscription SEO tools when running sporadic checks or integrating SEO data directly into an automated agent workflow.
Side effects
- Invalid or malformed request_json input returns an error
- Keyword or URL not found in search index returns null rank or empty result
- Network timeouts may cause failed execution status
- Caller-supplied data warnings indicate unverified inputs that may affect result accuracy
- Payment failure on Base network results in 402 response before 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_keyword_rank",
"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_keyword_rank",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "10000",
"resultSha256": "41db7e4ec8304ea023a1c0154a7f71715fb12783d078eb4363564cde0503a898",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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