Adversarial verification for AI agents - pay an independent skeptic per verdict in USDC via x402.
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Read from a real MCP initialize → tools/list handshake against the declared endpoint. No tool was ever invoked — tools/list is the read-only introspection call the protocol defines for this. It reflects what the server advertised at that moment; a hosted endpoint is not pinned to any version and can change without notice.
https://secondopinionx402.com/mcp6 tools · 386mssecond_opinion_quickIndependent 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_ver…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_ver…
| Parameter | Type | Description |
|---|---|---|
| claim* | string | The single claim to verify, stated plainly. |
| context | string | Why this claim matters / where it came from. |
| payment | string | 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 machin… |
second_opinion_verifyIndependent 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 pa…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 pa…
| Parameter | Type | Description |
|---|---|---|
| claim* | string | The single claim to verify, stated plainly. |
| context | string | Why this claim matters / where it came from. |
| payment | string | 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 machin… |
| claimed_sources | array | URLs you relied on — they will be scrutinised, not trusted. |
second_opinion_panelThree 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…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…
| Parameter | Type | Description |
|---|---|---|
| claim* | string | The single claim to verify, stated plainly. |
| context | string | Why this claim matters / where it came from. |
| payment | string | 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 machin… |
second_opinion_tryFREE 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 veri…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 veri…
| Parameter | Type | Description |
|---|---|---|
| claim* | string | The single claim to verify, stated plainly (free trial: max 500 chars). |
| context | string | Why this claim matters / where it came from. |
second_opinion_resultFetch 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.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.
| Parameter | Type | Description |
|---|---|---|
| job_id* | string | The job id returned by a paid verification tool call. |
second_opinion_pricingFREE: 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.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.
No input schema was published for this tool.
6 of 6 tools published a description.
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Adversarial verification for AI agents - pay an independent skeptic per verdict in USDC via x402.
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