Second Opinion

Independent reasoning-only check of a claim ($0.02, ~20s, no web research). Use for logic, internal consistency, and stable established knowledge (definitions, architectures, history, maths). Returns refuted/supported/inconclusive with calibrated confidence; honestly escalates to second_opinion_verify when the claim needs current-world research. Without a payment argument it returns an exact pay-per-call quote (no account, no API key).

{
  "type": "object",
  "properties": {
    "claim": {
      "type": "string",
      "minLength": 8,
      "maxLength": 2000,
      "description": "The single claim to verify, stated plainly."
    },
    "context": {
      "description": "Why this claim matters / where it came from.",
      "type": "string",
      "maxLength": 4000
    },
    "payment": {
      "description": "Base64 x402 payment payload built by YOUR wallet for one of the quoted accepts entries (the same string the X-PAYMENT header carries). Omit to receive a machine-readable quote.",
      "type": "string",
      "maxLength": 20000,
      "pattern": "^[A-Za-z0-9+/=_-]+$"
    }
  },
  "required": [
    "claim"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Independent adversarial verification with live web research ($0.20, ~60s). A separate AI attempts to refute the claim using current sources and returns a verdict with citations. Use before irreversible commitments that depend on current-world facts. Without a payment argument it returns an exact pay-per-call quote (no account, no API key).

{
  "type": "object",
  "properties": {
    "claim": {
      "type": "string",
      "minLength": 8,
      "maxLength": 2000,
      "description": "The single claim to verify, stated plainly."
    },
    "context": {
      "description": "Why this claim matters / where it came from.",
      "type": "string",
      "maxLength": 4000
    },
    "payment": {
      "description": "Base64 x402 payment payload built by YOUR wallet for one of the quoted accepts entries (the same string the X-PAYMENT header carries). Omit to receive a machine-readable quote.",
      "type": "string",
      "maxLength": 20000,
      "pattern": "^[A-Za-z0-9+/=_-]+$"
    },
    "claimed_sources": {
      "description": "URLs you relied on — they will be scrutinised, not trusted.",
      "maxItems": 5,
      "type": "array",
      "items": {
        "type": "string",
        "format": "uri"
      }
    }
  },
  "required": [
    "claim"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Three independent adversarial verifiers attack the claim through different lenses (evidence, logic, currency) and vote ($0.75, ~90s). Use for high-stakes or contested claims where a single check is not enough. Without a payment argument it returns an exact pay-per-call quote (no account, no API key).

{
  "type": "object",
  "properties": {
    "claim": {
      "type": "string",
      "minLength": 8,
      "maxLength": 2000,
      "description": "The single claim to verify, stated plainly."
    },
    "context": {
      "description": "Why this claim matters / where it came from.",
      "type": "string",
      "maxLength": 4000
    },
    "payment": {
      "description": "Base64 x402 payment payload built by YOUR wallet for one of the quoted accepts entries (the same string the X-PAYMENT header carries). Omit to receive a machine-readable quote.",
      "type": "string",
      "maxLength": 20000,
      "pattern": "^[A-Za-z0-9+/=_-]+$"
    }
  },
  "required": [
    "claim"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

FREE TRIAL — no wallet, no payment, no account: the same quick reasoning-only check as second_opinion_quick, 3/day per caller (claims up to 500 chars; global daily cap applies). The trial verdict is unsigned — paid verdicts add an offline-verifiable Ed25519 receipt and live web research on the verify/panel tiers. Try the product here; use the paid tools for real work.

{
  "type": "object",
  "properties": {
    "claim": {
      "type": "string",
      "minLength": 8,
      "maxLength": 500,
      "description": "The single claim to verify, stated plainly (free trial: max 500 chars)."
    },
    "context": {
      "description": "Why this claim matters / where it came from.",
      "type": "string",
      "maxLength": 1000
    }
  },
  "required": [
    "claim"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Fetch the verdict for a paid async job — polling is FREE and the verdict is already paid for. Returns status running|done|failed, with the full verdict when done.

{
  "type": "object",
  "properties": {
    "job_id": {
      "type": "string",
      "minLength": 4,
      "maxLength": 100,
      "description": "The job id returned by a paid verification tool call."
    }
  },
  "required": [
    "job_id"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

FREE: current tiers, prices, and exact on-chain payment requirements (accepts) for every rail — Algorand, Base, Polygon, Solana. Use this to pre-build a payment, or to discover what a verification will cost before committing.

{
  "type": "object",
  "properties": {},
  "$schema": "http://json-schema.org/draft-07/schema#"
}