Gonka Second Opinion — MCP Server

Get a second opinion from independent LLMs — in one call, for a fraction of a cent.

gonka-second-opinion runs your prompt across the independent models live on the Gonka network and across assigned debate roles (skeptic / proponent / pragmatist …), in a single MCP call. Your main model stays in charge — you just get a panel of divergent views to check a decision against, without switching providers.

Live at: https://mcp.gogonka.com/mcp

One question → three independent opinions

<p align="center"> <img src="https://gogonka.com/img/second-opinion-example.svg" alt="Example: gonka_second_opinion runs one prompt across independent models and roles (proponent/skeptic/pragmatist) and returns attributed, divergent answers for your model to synthesize." width="820"> </p>

<p align="center"> <img src="https://gogonka.com/img/panel-cost.svg" alt="One 3-model second opinion costs about 0.0014 cents — a fraction of a cent per panel." height="72"> </p>

The example is illustrative — the live model set rotates over time; call `get_available_models` for today’s lineup. Per-panel cost is typical/measured; check `get_pricing` for live rates.

Why this instead of a plain LLM connector

• A panel, not a single answer. Independent models trained by different labs

surface non-overlapping failure modes. Assigned roles add behavioral diversity on top. You get disagreement you can act on, not one confident guess.

• Cheap enough to always use. On the big providers a 3-way panel costs real money,

so nobody runs one. On Gonka it's a fraction of a cent — a second opinion becomes a default habit, not a luxury.

• Zero setup, works in a sandbox. The server makes the gateway call for you.

An agent with no outbound network and no way to edit its own config can still use it over the already-open MCP channel. Free trial by default; paste your own key to run on your balance.

Install (30 seconds)

Add to your MCP client config (Claude Desktop / Cursor / …):

{
  "mcpServers": {
    "gonka-second-opinion": {
      "url": "https://mcp.gogonka.com/mcp"
    }
  }
}

Restart the client — the tools appear automatically. No API key required to start (a free trial key is issued per caller).

Custom clients:

curl -X POST https://mcp.gogonka.com/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"tools/list","id":1}'

Use your own key (after you register)

Registered on the JoinGonka gateway (gate.joingonka.ai)? Then run every call on your own balance — no trial budget, no per-IP limit. First get your key:

1. Sign up at the JoinGonka gateway

(welcome bonus: 50M nGNK, no credit card).

1. Open your gateway dashboard → API keys → copy your JoinGonka gateway key (starts with jg-).

Then tell this MCP server to use it — pick the way that matches your client:

A. Client with an API-key / header field (Cursor, Claude Code, LibreChat, most custom clients)

Put the key in the server's Authorization header — it arrives as Bearer … and every call switches to your balance automatically:

{
  "mcpServers": {
    "gonka-second-opinion": {
      "url": "https://mcp.gogonka.com/mcp",
      "headers": { "Authorization": "Bearer jg-YOUR_KEY_HERE" }
    }
  }
}

If your client shows a plain API key / Bearer token box instead of raw headers, just paste your jg-… JoinGonka gateway key there.

B. Client with no key/header field (e.g. claude.ai Custom Connectors)

Mint a personal connector URL that carries your key for you:

1. Go to https://mcp.gogonka.com/personal
2. Paste your jg-… JoinGonka gateway key → you get a URL like https://mcp.gogonka.com/k/<token>/mcp
3. Add that URL as the MCP connector (in claude.ai: Add custom connector → URL).

Nothing else to enter — no key field needed.

Keep the personal URL secret — it stands in for your key. The same key always mints the same URL.

How it's handled: the key (or personal token) is read from the request only, forwarded to the JoinGonka gateway, and never stored or logged. An unrelated Authorization header (OAuth, a proxy's own token) is ignored, so it can't break the free trial path. Remove the header/URL and the server falls back to the free trial.

The flagship tools

gonka_second_opinion(prompt, system?, perspectives?, max_tokens?)

Run one prompt across the live models and/or a set of roles, in parallel.

• Leave perspectives empty → one opinion per live model.
• Pass perspectives (short role/stance labels, max 5) → one opinion per role,

each answered candidly from that viewpoint, rotated across the live models. Examples: ["for","against","neutral"], ["security expert","product manager","end user"].

• Returns { opinions:[{model, perspective?, response}], synthesis_instructions, trial_budget|cost }.

Attribute each opinion to its model + role when you present them.

gonka_chat(prompt, system?, model?, max_tokens?)

One completion through the server — for when you want a single cheap answer, or a sub-task run without giving the agent its own network/key. model accepts "auto", a nickname, or an exact id; anything not live right now is routed to a model that is.

Both tools auto-detect trial (free, per-IP budget) vs registered (your own jg-… key) mode. On trial exhaustion they return a signup link + welcome bonus to relay to the user — no fabricated keys, no altered numbers.

Also included

<details> <summary><b>Cost intelligence</b> — is Gonka actually cheaper for your workload? (8 tools)</summary>

<br>

<img src="https://gogonka.com/img/price-badge.svg" alt="Gonka live inference price per 1M tokens and how many times cheaper than GPT-5.5 — see get_pricing for the real-time number." height="80">

Reflects the last cached render (GitHub proxies images); call `get_pricing` for the real-time number. All figures float with the GNK/USD rate — never trust a hardcoded one.

• get_pricing — current $/1M tokens, GNK/USD rate, live ratios vs OpenAI/DeepSeek/Anthropic
• compare_providers(provider) — side-by-side vs openai / anthropic / deepseek / mistral / gemini
• calculate_savings(monthly_spend_usd) — exact monthly/annual savings for your spend
• suggest_model_for_task(task_description, …) — model + cost recommendation
• get_available_models — the models live on the network right now, with live pricing
• get_trial_key — free gc- key instantly (no signup); expires in 2h, first use extends to 24h
• get_signup_link — permanent account + welcome bonus + copy-paste SDK snippets
• register_on_gonka(…) — personalized cost-analysis pitch (computes savings; does not create an account)

</details>

<details> <summary><b>Documentation knowledge graph</b> — search 1000+ Gonka concepts (10 tools)</summary>

<br>

• query_graph(question, …) — topic search over the concept graph
• search_docs(query, …) / read_doc(filename, …) / list_docs() — full-text docs
• get_node(label) / get_neighbors(label, …) — concept detail and relations
• get_god_nodes() / get_community(id) / get_graph_stats() — structure overview
• find_shortest_path(source, target, …) — conceptual path between two ideas

</details>

<details> <summary><b>MCP prompts &amp; resources</b></summary>

<br>

• Prompt gonka_start(task) — seed a cost-comparison conversation
• Prompt calculate_my_savings(monthly_spend_usd) — seed a savings estimate
• Resource gonka://pricing-guide — structured live pricing data + decision matrix

</details>

Honesty & hygiene

• Live, not hardcoded. Prices float with the market and the model set rotates —

the server quotes both live (get_pricing, get_available_models), and the badges above are rendered from live data, not typed into this file.

• Panel ≠ magic. A second opinion is worth exactly as much as the models are

independent. The panel uses the genuinely different models live on the network at the time of the call; it does not claim a bigger fleet than is actually serving.

• OpenAI/Anthropic-compatible. Two config changes, zero code changes:

base_url=https://gate.joingonka.ai/v1 (OpenAI) or https://gate.joingonka.ai (Anthropic).

• Tool hygiene. All tools ship typed input schemas with MCP annotations

(readOnlyHint, idempotentHint, openWorldHint), enum/range constraints, and clear descriptions. Inference tools are per-IP rate-limited in trial mode.

• Privacy. HTTPS/TLS 1.2+. No keys in query strings (flagged by middleware).

Anonymized logging (IP, User-Agent, tool name); inference prompts truncated; caller keys never logged or returned.

Live health grade: https://wmcp.sh/mcp/grade/mcp.gogonka.com

Links

• Website: https://gogonka.com
• GitHub: https://github.com/bystray/gonka-mcp-server
• Signup (welcome bonus): https://gate.joingonka.ai/register?ref=cf2bd855-ba1e-4b6e-8e56-9970049eec31
• Live pricing JSON: https://gogonka.com/pricing.json
• Status / grade: https://wmcp.sh/mcp/grade/mcp.gogonka.com

License: MIT · Version: 2.2.0