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Synap MCP Server

answering

Synap is answering right now. Last checked 5 min ago. It exposes 4 tools.

Open-model LLM inference for agents. Pay per call in USDC via x402 or API key. First call free.

Uptime history 5 hours of history
5 hours agonow
100.0%
Uptime 24h
18 of 18 checks
4
Tools
read from the server
224 ms
Response time
average over 24h
open, no key
Access
streamable-http

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 5 min ago.

run in your terminal
claude mcp add synap-mcp --transport http https://synap402.com/mcp
Settings → Connectors → Add custom connector, then paste this address
https://synap402.com/mcp
~/.codex/config.toml
[mcp_servers.synap-mcp]
url = "https://synap402.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "synap-mcp": {
      "url": "https://synap402.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "synap-mcp": {
      "type": "http",
      "url": "https://synap402.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://synap402.com/mcp streamable-http answering 208 ms 5 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 18 of 18 checks got a reply (100.0%), average response time 224 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 224 ms on average, which is faster than 60% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.