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Synap MCP Server

answering

Synap is answering right now. Last checked 11 min ago. It exposes 4 tools. Last commit 29 Oct 2026.

Open AI models through one OpenAI-compatible API: chat, live model list, prices and cost estimates.

Uptime history 50 days of history · worst day 46%
50 days agonow
100.0%
Uptime 24h
91 of 91 checks
4
Tools
read from the server
109 ms
Response time
average over 24h
0
Stars
last commit 29 Oct 2026

What changed 9

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 5 October 2026. No other catalogue keeps this.

16 Oct a tool changed version
14 Oct a tool changed the parameters it asks for synap_chat_completion
5 Oct 2 tools appeared synap_estimate_cost, synap_get_model
5 Oct 2 tool descriptions were rewritten synap_chat_completion, synap_list_models
5 Oct 2 tools changed the parameters they ask for synap_chat_completion, synap_list_models
5 Oct a tool changed version

Nothing serious here today

Today is the operative word: we check Synap every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 11 min ago.

run in your terminal
claude mcp add synap --transport http https://pool.linkrra.com/mcp
Settings → Connectors → Add custom connector, then paste this address
https://pool.linkrra.com/mcp
~/.codex/config.toml
[mcp_servers.synap]
url = "https://pool.linkrra.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "synap": {
      "url": "https://pool.linkrra.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "synap": {
      "type": "http",
      "url": "https://pool.linkrra.com/mcp"
    }
  }
}

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

synap
synap_chat_completion
Send a conversation to a model on Synap, Linkrra's OpenAI-compatible inference API, and get the model's reply. Use this when you need text generated, code written or a question answered by one of the open models Synap serves. This is the only tool here that costs money: it bills prompt and completion tokens to the Synap API key supplied as the Authorization: Bearer header on the MCP connection. With no key it returns an error and nothing is spent; a key with no balance returns insufficient_credits. Call synap_estimate_cost first if the price matters. Returns the standard OpenAI chat.completion JSON (choices[0].message.content holds the reply, usage holds token counts). The call is not streamed and keeps no memory between calls — send the full message history each time.
synap_estimate_cost
Work out what a chat completion would cost on Synap from token counts, using the live price list. Use this before synap_chat_completion when budget matters, or to compare models for a job. Free, read-only, needs no API key and runs no model. Returns {model, prompt_tokens, completion_tokens, prompt_usd, completion_usd, total_usd, pricing}. It is an estimate: the real charge uses the token counts the model reports afterwards. Auto-routing ids such as "synap-v1" have no fixed price and return an error saying so.
synap_get_model
Return the complete catalogue record for one Synap model: pricing, context and output limits, supported parameters, quantisation, data-retention policy and readiness. Use this after synap_list_models when you need details the summary leaves out. Free, read-only and needs no API key. Returns the raw model object, or an error naming the id if Synap does not serve it.
synap_list_models
List the models Synap serves right now, each with its price per million tokens, context window and what it is good at. Use this to choose a model id before calling synap_chat_completion, or to compare prices. Free, read-only, no API key needed, and safe to call repeatedly; the list is live, so models can appear or go between calls. Returns {"object":"list","count":N,"data":[{id,name,capability,tier,context_tokens,max_output_tokens,pricing,data_policy}]}; pricing is USD per million prompt and completion tokens and is absent for the auto-routing ids ("synap-v1"), which bill at the price of the model they route to. For every field of one model use synap_get_model.

Endpoints

URLTransportStateLatencyChecked
https://pool.linkrra.com/mcp streamable-http answering 157 ms 11 min ago

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Synap — questions

Answers built from our own checks of this server.

What can Synap do?
It exposes 4 tools, read directly from the server on our last check. Among them: synap_chat_completion, synap_estimate_cost, synap_get_model, synap_list_models. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Synap working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 109 ms. The bar chart above shows every period we have measured.
How do I connect Synap?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Synap need an API key?
No. Synap completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Synap?
It answers our handshake in 109 ms on average, which is faster than 90% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is Synap open source?
The code is open source: it is published under the Apache-2.0 licence, written in JavaScript and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at pool.linkrra.com, which runs on its operator's own terms.