Use this service when you need this capability: extracts bounded JSON-LD Schema.org entities, type indexes, and explicit relationships without inventing values.
0.01 USDC per call
x402 V2 exact payment on Base mainnet (eip155:8453) using USDC. The HTTP 402 challenge confirms the exact requirements before an authorized payment.
POST https://signalharness.ai/api/agent/services/schema_org_extract/invokeExtracts bounded JSON-LD Schema.org entities, type indexes, and explicit relationships without inventing values.
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": "<script type=\"application/ld+json\">{\"@type\":\"WebPage\"}</script>"
}{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"additionalProperties": false,
"minProperties": 1,
"maxProperties": 2,
"required": [],
"properties": {
"url": {
"type": "string",
"pattern": "^https://",
"minLength": 9,
"maxLength": 2048
},
"html": {
"type": "string",
"minLength": 1,
"maxLength": 65536
},
"baseUrl": {
"type": "string",
"pattern": "^https://",
"minLength": 9,
"maxLength": 2048
}
}
}Illustrative output from the canonical adapter fixture and schema. It is not a completed paid execution or a current live observation.
{
"entityCount": 0,
"typeIndex": [
{
"type": "example",
"ids": [
"example"
]
}
],
"entities": [
{
"id": "example",
"types": [
"example"
],
"valueJson": "example"
}
],
"relationships": [
{
"from": "example",
"to": "example",
"kind": "example"
}
],
"warnings": [
"Verify the caller-supplied data before relying on this result."
]
}{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"additionalProperties": false,
"minProperties": 5,
"maxProperties": 5,
"required": [
"entityCount",
"typeIndex",
"entities",
"relationships",
"warnings"
],
"properties": {
"entityCount": {
"type": "integer",
"minimum": 0,
"maximum": 2000
},
"typeIndex": {
"type": "array",
"minItems": 0,
"maxItems": 256,
"items": {
"type": "object",
"additionalProperties": false,
"minProperties": 2,
"maxProperties": 2,
"required": [
"type",
"ids"
],
"properties": {
"type": {
"type": "string",
"minLength": 1,
"maxLength": 256
},
"ids": {
"type": "array",
"minItems": 1,
"maxItems": 256,
"items": {
"type": "string",
"minLength": 1,
"maxLength": 2048
}
}
}
}
},
"entities": {
"type": "array",
"minItems": 0,
"maxItems": 256,
"items": {
"type": "object",
"additionalProperties": false,
"minProperties": 3,
"maxProperties": 3,
"required": [
"id",
"types",
"valueJson"
],
"properties": {
"id": {
"type": "string",
"minLength": 1,
"maxLength": 2048
},
"types": {
"type": "array",
"minItems": 0,
"maxItems": 32,
"items": {
"type": "string",
"minLength": 1,
"maxLength": 256
}
},
"valueJson": {
"type": "string",
"minLength": 2,
"maxLength": 65536
}
}
}
},
"relationships": {
"type": "array",
"minItems": 0,
"maxItems": 256,
"items": {
"type": "object",
"additionalProperties": false,
"minProperties": 3,
"maxProperties": 3,
"required": [
"from",
"to",
"kind"
],
"properties": {
"from": {
"type": "string",
"minLength": 1,
"maxLength": 2048
},
"to": {
"type": "string",
"minLength": 1,
"maxLength": 2048
},
"kind": {
"type": "string",
"minLength": 1,
"maxLength": 256
}
}
}
},
"warnings": {
"type": "array",
"minItems": 0,
"maxItems": 32,
"items": {
"type": "string",
"minLength": 1,
"maxLength": 1024
}
}
}
}Timeout: 30000 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/schema_org_extract/invoke \
-H "Content-Type: application/json" \
--data '{"html":"<script type=\"application/ld+json\">{\"@type\":\"WebPage\"}</script>"}'