Fidenta Verify

Fact-check text against live web evidence from two independent retrievers, then have a model from a different lab audit the verdict. Returns per-claim verdicts: SUPPORTED, CONTRADICTED, UNSUPPORTED (searched and found nothing — not the same as false), or UNVERIFIABLE (opinion or prediction). Use before relying on a factual claim, or to check your own draft answer before sending it.

{
  "type": "object",
  "properties": {
    "text": {
      "type": "string",
      "description": "The text to verify. A single claim or a full answer containing several. May also be a bare link, e.g. 'verify https://example.com/article'."
    },
    "url": {
      "type": "string",
      "description": "A public http(s) link to an article or web page. We fetch it, extract the readable text and verify the claims in it. Use this when the user gives you a link instead of text — you do not need to fetch the page yourself. Pages behind a login or paywall cannot be read; ask for the text instead."
    },
    "force": {
      "type": "boolean",
      "description": "Re-check even if a recent saved result exists."
    },
    "max_claims": {
      "type": "integer",
      "description": "Hard cap on how many claims to verify, and therefore on how many credits this call can spend. Use it to bound cost on a long document."
    },
    "confirm": {
      "type": "boolean",
      "description": "Required to proceed when the text contains more than 3 checkable claims. Call estimate_claims first, tell the user the claim count and credit cost, then call again with confirm true once they agree."
    }
  }
}

FREE. Break text into checkable claims and report how many there are and how many credits verifying them would cost. Spends nothing and verifies nothing. Always call this before verify_claims on anything longer than a sentence or two — an article can contain 20 claims, and each claim costs one credit, so the user should see the price before agreeing to it.

{
  "type": "object",
  "properties": {
    "text": {
      "type": "string",
      "description": "The text to break into claims. May also be a bare link."
    },
    "url": {
      "type": "string",
      "description": "A public http(s) link to an article or web page. We fetch it, extract the readable text and verify the claims in it. Use this when the user gives you a link instead of text — you do not need to fetch the page yourself. Pages behind a login or paywall cannot be read; ask for the text instead."
    }
  }
}

Buy more verification credits without leaving the conversation. Call with confirm false (or omit it) to see the price, the card on file and the remaining monthly limit; call again with confirm true once the user has agreed. Charges the card the user already saved and authorised for in-chat top-ups — if no card is saved, or the bank requires the cardholder present, it returns a secure checkout link instead of charging.

{
  "type": "object",
  "properties": {
    "confirm": {
      "type": "boolean",
      "description": "True only after the user has explicitly agreed to the charge. Never set this on your own initiative."
    }
  }
}

Look up whether a claim has already been verified on this account, without spending a verification.

{
  "type": "object",
  "properties": {
    "claim": {
      "type": "string"
    }
  },
  "required": [
    "claim"
  ]
}

Report how many verifications remain on this account for the current period.

{
  "type": "object",
  "properties": {}
}