Docs & AI · Official remote MCP server

The Second Opinion MCP server,
connected in one click.

Adversarial verification for AI agents - pay an independent skeptic per verdict in USDC via x402. Connect the official Second Opinion MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.

Connect Second Opinion free How it works

Free to start · No credit card · No hosting needed

Use this server

Add Second Opinion to your AI in one minute

Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.

claude mcp add --transport http second-opinion https://secondopinionx402.com/mcp

Run in your terminal, then restart Claude Code.

Second Opinion · https://secondopinionx402.com/mcp

What you can do

What your AI can do with Second Opinion

Real prompts you can type the moment it's connected — no setup, no docs to read.

“Use “second_opinion_quick”: Independent reasoning-only check of a claim ($0.02, ~20s, no web research). Use for logic, internal consistency, and stable established know.”

“Use “second_opinion_verify”: Independent adversarial verification with live web research ($0.20, ~60s). A separate AI attempts to refute the claim using current sources.”

“Use “second_opinion_panel”: Three independent adversarial verifiers attack the claim through different lenses (evidence, logic, currency) and vote ($0.75, ~90s). Use fo.”

“Use “second_opinion_try”: 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.”

Security check

How secure is the Second Opinion MCP server?

Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Second Opinion holds up.

✓ Verified directory serverSecond Opinion · secondopinionx402.com

Official endpoint

Operated by Second Opinion (secondopinionx402.com) at its documented MCP endpoint — not a third-party mirror or community re-host.

No sign-in needed

This server only exposes public data — no account and no credentials are involved when you connect.

Scanned before it goes live

gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.

Watched for drift

If Second Opinion adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.

Run the free scanner on Second Opinion's server →

How it works

Connected in three steps

Connect your gate

Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.

Pick Second Opinion

Choose Second Opinion in the gate directory. No sign-in needed.

Use it anywhere

Second Opinion's tools are live in every AI client you've connected — with rules and logging built in.

Connect Second Opinion free

Free to start · No credit card · No hosting needed

Straight from the server

The actual tools Second Opinion exposes

Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.

second_opinion_quick — Independent reasoning-only check of a claim ($0.02, ~20s, no web research). Use for logic, internal consistency, and stable established know

second_opinion_verify — Independent adversarial verification with live web research ($0.20, ~60s). A separate AI attempts to refute the claim using current sources

second_opinion_panel — Three independent adversarial verifiers attack the claim through different lenses (evidence, logic, currency) and vote ($0.75, ~90s). Use fo

second_opinion_try — 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

second_opinion_result — 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 f

second_opinion_pricing — FREE: current tiers, prices, and exact on-chain payment requirements (accepts) for every rail — Algorand, Base, Polygon, Solana. Use this to

Author

Who runs the Second Opinion MCP server?

secondopinionx402.com

Homepage More servers from secondopinionx402.com →

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Server facts

The Second Opinion MCP server at a glance

Endpointhttps://secondopinionx402.com/mcp

Operated bySecond Opinion (secondopinionx402.com)

CategoryDocs & AI

Sign-inNone — public data only

Available in gateYes — one-click connect

Works withClaude, ChatGPT, Cursor & any MCP client

FAQ

Questions, answered

Is there an official Second Opinion MCP server?

Yes — Second Opinion operates its own remote MCP server at secondopinionx402.com. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.

How do I connect Second Opinion to Claude or ChatGPT?

Add gate's gateway URL to your AI client once, then pick Second Opinion in the directory. No account or sign-in is needed. From then on, Second Opinion's tools are available in every client you've connected to gate.

Do I need to host anything?

No. Second Opinion runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.

Is the Second Opinion MCP server safe to connect?

It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.