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SignalHarness Link Graph Extractor
x402
SignalHarness Link Graph Extractor 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).
Extracts a structured link graph from a webpage, returning nodes, edges, internal links, external links, anchors, and link counts.
Price / call$0.01
Success—
StatusUnknown
How this service works
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Output
Returns a JSON object containing: graph nodes and edges representing the link structure, an array of anchor elements, arrays of internal and external links, total link count, duplicate link count, and unique destination count — plus a payment receipt with execution metadata, latency, and a SHA-256 result hash.
Example use cases
SEO link audit for a landing page
“Can you extract all the internal and external links from https://mysite.com/landing-page so I can audit which outbound links we're sending visitors to?”
Broken link detection pipeline
“Pull the full link graph from https://docs.myapp.com/getting-started — I need the list of all linked URLs so I can check which ones are broken.”
Competitive link structure analysis
“Extract the complete link graph from https://competitor.com/features — I want to see their internal linking structure and how many unique destinations they link to.”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/link_graph_extract/invokeWhen to prefer
Choose this endpoint when you need a structured, machine-readable link graph — including node/edge topology, internal vs. external link classification, anchor data, and deduplication stats — rather than a simple flat list of hyperlinks. It is well-suited for agent workflows that need to reason about page link structure programmatically, feed links into downstream crawlers, or audit SEO linking patterns at $0.01 per call.
Side effects
- Invalid or unreachable URL returns an error or empty graph
- HTML content exceeding 65,536 characters is rejected
- URL not matching ^https:// pattern causes validation failure
- Missing both url and html fields may cause a failed invocation
- Payment failure results in no execution and a failed receipt status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | |
| html | string | |
| baseUrl | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"edges": [
"example"
],
"nodes": [
"example"
],
"anchors": [
"example"
],
"baseUrl": "example00",
"linkCount": 0,
"externalLinks": [
"example"
],
"internalLinks": [
"example"
],
"duplicateCount": 0,
"uniqueDestinationCount": 0
},
"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": "link_graph_extract",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "10000",
"resultSha256": "b02ed9f247a705573b6f2f8f5ca89f178d4d23ccd6da547fd05490e8ffb0b53e",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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