provenance $0.01 per call

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.

For AI agents: call provenance
POST https://toll402.dev/v1/provenance
{
 "url": "https://en.wikipedia.org/wiki/Turing_test",
 "deep": false
}
Answers 402 with x402 payment requirements; pay with any x402 client (@x402/fetch, x402 for Python, toll402-client, toll402-mcp) or send a prepaid-credits key as x-toll402-key (https://toll402.dev/credits). Paid per call via x402 (USDC on Base) or with a prepaid-credits key (x-toll402-key, card at /credits); charged only on success. Start at /llms.txt or connect the MCP server: npx -y toll402-mcp · remote https://toll402.dev/mcp.

Input schema

{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "description": "Public URL to assess",
   "format": "uri"
  },
  "deep": {
   "type": "boolean",
   "default": true,
   "description": "Also run an LLM stylometric assessment (only when the server has an LLM key)"
  }
 },
 "required": [
  "url"
 ],
 "additionalProperties": false
}

Example output

{
 "humanOriginScore": 82,
 "verdict": "likely_human",
 "confidence": 0.9,
 "firstArchived": "2003-05-12T00:00:00Z",
 "source": {
  "tier": 1
 },
 "evidence": [
  {
   "signal": "wayback_first_capture",
   "value": "2003-05-12T00:00:00Z",
   "direction": "human"
  }
 ]
}

MCP

{"mcpServers":{"toll402":{"command":"npx","args":["-y","toll402-mcp"],"env":{"TOLL402_WALLET_KEY":"0x..."}}}}

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