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.
 !MCP 
Live at: https://mcp.gogonka.com/mcp
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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.
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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.
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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}'
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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:
- Sign up at the JoinGonka gateway
(welcome bonus: 12M nGNK, no credit card).
- 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:
- Go to https://mcp.gogonka.com/personal
- Paste your
jg-…JoinGonka gateway key → you get a URL likehttps://mcp.gogonka.com/k/<token>/mcp - 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.
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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
perspectivesempty → 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.
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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/Anthropiccompare_providers(provider)— side-by-side vs openai / anthropic / deepseek / mistral / geminicalculate_savings(monthly_spend_usd)— exact monthly/annual savings for your spendsuggest_model_for_task(task_description, …)— model + cost recommendationget_available_models— the models live on the network right now, with live pricingget_trial_key— freegc-key instantly (no signup); expires in 2h, first use extends to 24hget_signup_link— permanent account + welcome bonus + copy-paste SDK snippetsregister_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 graphsearch_docs(query, …)/read_doc(filename, …)/list_docs()— full-text docsget_node(label)/get_neighbors(label, …)— concept detail and relationsget_god_nodes()/get_community(id)/get_graph_stats()— structure overviewfind_shortest_path(source, target, …)— conceptual path between two ideas
</details>
<details> <summary><b>MCP prompts & 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>
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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
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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











