Use this service when you need this capability: extracts bounded normalized internal, external, and anchor relationships from supplied HTML or one safely fetched URL without crawling.
0.01 USDC per call
x402 V1 + V2 exact payment on Base mainnet (base in V1; eip155:8453 in V2) using USDC. One HTTP 402 response carries the canonical V2 PAYMENT-REQUIRED header and equivalent V1 JSON body.
POST https://signalharness.ai/api/agent/services/link_graph_extract/invokeExtracts bounded normalized internal, external, and anchor relationships from supplied HTML or one safely fetched URL without crawling.
Documented public-source retrieval is bounded by the URL, byte, redirect, and timeout limits below. Source availability can affect execution; review the input schema and returned source metadata.
| Field | Type | Required | Limits |
|---|---|---|---|
| url | string | Optional | Pattern: ^https://; Minimum length 9; Maximum length 2048 |
| html | string | Optional | Minimum length 1; Maximum length 65536 |
| baseUrl | string | Optional | Pattern: ^https://; Minimum length 9; Maximum length 2048 |
{
"html": "<a href=\"/example\">Example</a>",
"baseUrl": "https://example.com/"
}{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"additionalProperties": false,
"minProperties": 1,
"maxProperties": 2,
"required": [],
"properties": {
"url": {
"type": "string",
"pattern": "^https://",
"minLength": 9,
"maxLength": 2048
},
"html": {
"type": "string",
"minLength": 1,
"maxLength": 65536
},
"baseUrl": {
"type": "string",
"pattern": "^https://",
"minLength": 9,
"maxLength": 2048
}
}
}Illustrative output from the canonical adapter fixture and schema. It is not a completed paid execution or a current live observation.
{
"baseUrl": "example00",
"linkCount": 0,
"uniqueDestinationCount": 0,
"duplicateCount": 0,
"internalLinks": [
"example"
],
"externalLinks": [
"example"
],
"anchors": [
"example"
],
"nodes": [
"example"
],
"edges": [
"example"
]
}{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"additionalProperties": false,
"minProperties": 9,
"maxProperties": 9,
"required": [
"baseUrl",
"linkCount",
"uniqueDestinationCount",
"duplicateCount",
"internalLinks",
"externalLinks",
"anchors",
"nodes",
"edges"
],
"properties": {
"baseUrl": {
"type": "string",
"minLength": 9,
"maxLength": 2048
},
"linkCount": {
"type": "integer",
"minimum": 0,
"maximum": 512
},
"uniqueDestinationCount": {
"type": "integer",
"minimum": 0,
"maximum": 512
},
"duplicateCount": {
"type": "integer",
"minimum": 0,
"maximum": 512
},
"internalLinks": {
"type": "array",
"minItems": 0,
"maxItems": 256,
"items": {
"type": "string",
"minLength": 2,
"maxLength": 16384
}
},
"externalLinks": {
"type": "array",
"minItems": 0,
"maxItems": 256,
"items": {
"type": "string",
"minLength": 2,
"maxLength": 16384
}
},
"anchors": {
"type": "array",
"minItems": 0,
"maxItems": 256,
"items": {
"type": "string",
"minLength": 2,
"maxLength": 16384
}
},
"nodes": {
"type": "array",
"minItems": 0,
"maxItems": 256,
"items": {
"type": "string",
"minLength": 2,
"maxLength": 4096
}
},
"edges": {
"type": "array",
"minItems": 0,
"maxItems": 256,
"items": {
"type": "string",
"minLength": 2,
"maxLength": 4096
}
}
}
}Timeout: 20000 ms. Full schemas are in OpenAPI.
This schema-valid request returns the canonical HTTP 402 challenge without executing the service. A payment-capable client validates the challenge, signs only with prior authority and budget, and retries the identical body.
curl -i -X POST https://signalharness.ai/api/agent/services/link_graph_extract/invoke \
-H "Content-Type: application/json" \
--data '{"html":"<a href=\"/example\">Example</a>","baseUrl":"https://example.com/"}'