Use this service when you need this capability: fetches one public HTTPS HTML resource without JavaScript execution and returns cleaned Markdown with source integrity metadata.
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/url_to_markdown/invokeFetches one public HTTPS HTML resource without JavaScript execution and returns cleaned Markdown with source integrity metadata.
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 | Required | Pattern: ^https://; Minimum length 9; Maximum length 2048 |
{
"url": "https://example.com/"
}{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"additionalProperties": false,
"minProperties": 1,
"maxProperties": 1,
"required": [
"url"
],
"properties": {
"url": {
"type": "string",
"pattern": "^https://",
"minLength": 9,
"maxLength": 2048
}
}
}Illustrative output from the canonical adapter fixture and schema. It is not a completed paid execution or a current live observation.
{
"markdown": "# Example\n\nNormalized caller-supplied content.",
"sourceUrl": "example00",
"contentType": "Example caller-supplied content.",
"byteCount": 0,
"sha256": "0000000000000000000000000000000000000000000000000000000000000000"
}{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"additionalProperties": false,
"minProperties": 5,
"maxProperties": 6,
"required": [
"markdown",
"sourceUrl",
"contentType",
"byteCount",
"sha256"
],
"properties": {
"markdown": {
"type": "string",
"minLength": 0,
"maxLength": 65536
},
"title": {
"type": "string",
"minLength": 0,
"maxLength": 1024
},
"sourceUrl": {
"type": "string",
"minLength": 9,
"maxLength": 2048
},
"contentType": {
"type": "string",
"minLength": 1,
"maxLength": 256
},
"byteCount": {
"type": "integer",
"minimum": 0,
"maximum": 10485760
},
"sha256": {
"type": "string",
"pattern": "^[0-9a-f]{64}$",
"minLength": 64,
"maxLength": 64
}
}
}Timeout: 15000 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/url_to_markdown/invoke \
-H "Content-Type: application/json" \
--data '{"url":"https://example.com/"}'