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Toll402 URL Provenance & Human-Origin Scorer
x402
Toll402 URL Provenance & Human-Origin Scorer is a paid API for AI agents from toll402.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Assesses whether a URL's content is human-authored or AI-generated, returning a calibrated 0-100 human-origin score backed by evidence signals like archive date, domain age, authorship markup, and optional LLM stylometric analysis.
Price / call$0.01
Success—
StatusUnknown
How this service works
Human or synthetic? Provenance evidence for a URL: archive first-capture date, domain age, authorship markup, curated source tier, AI disclosures and stylometric signals, aggregated into a calibrated 0-100 human-origin score with every piece of evidence. Add deep=true for an LLM stylometric assessment.
Output
Returns a JSON object with: a 0-100 humanOriginScore (higher = more likely human-authored), a verdict string (e.g. 'likely human', 'likely AI'), a confidence number, the firstArchived date of the URL, an array of evidence signals (each with signal name, value, and direction indicating whether it supports human or AI origin), and a source tier. Response also includes timing (ms) and an ok status flag. With deep=true, an additional LLM-based stylometric assessment is included.
Example use cases
Fact-checking AI-generated news articles
“I found this news article at https://techblog.example.com/2024/ai-regulation — can you tell me if it was written by a human or generated by AI? Run the deep stylometric check and show me all the evidence signals.”
Vetting freelance writer submissions
“Before I pay this freelancer, can you score how likely it is that the article at https://freelancerportfolio.example.com/sample-article is genuinely human-written? I want to see the confidence level and all the provenance evidence.”
Research source credibility check
“I'm citing https://researchblog.example.com/climate-study in my paper — can you check how old this domain is, when it was first archived, and give me a human-origin score to help assess whether this source is credible and not AI-generated?”
Technical details
Endpoint
GEThttps://toll402.dev/v1/provenanceWhen to prefer
Choose this endpoint when you need a structured, evidence-backed provenance assessment of a specific URL — especially when you want multiple corroborating signals (archive age, domain age, authorship markup, curated source tier) rather than just a single AI-detector heuristic. It's ideal for content moderation pipelines, research vetting workflows, or any scenario where you need an auditable chain of evidence rather than a black-box classification. Prefer it over generic AI detectors when provenance metadata (first-capture date, domain age, source tier) matters as much as stylometric signals.
Side effects
- URL is not publicly accessible or returns an error (404, 403, etc.) — ok:false with an error message
- URL is malformed or not a valid URI — validation error on input schema
- LLM stylometric assessment unavailable if server has no LLM key configured (deep=true silently degrades or returns partial results)
- Very new or obscure URLs may have no archive history, reducing evidence quality
- Rate limiting or payment failure via x402 protocol if USDC balance is insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"source": {
"tier": 1
},
"verdict": "likely_human",
"evidence": [
{
"value": "2003-05-12T00:00:00Z",
"signal": "wayback_first_capture",
"direction": "human"
}
],
"confidence": 0.9,
"firstArchived": "2003-05-12T00:00:00Z",
"humanOriginScore": 82
}
}Tags
x402
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