Synap

Name: Synap
Author: jimmyplup

by jimmyplupversion 1.2.0i★ –iRuns in the cloud

Registry namecom.linkrra/synap

Install

Overview

Description from the maker (original English)

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

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi0 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Chat & email
You need to fill in: Authorization

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 0 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
You fill in yourself: Authorization

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Run this in your terminal

claude mcp add --transport http synap https://pool.linkrra.com/mcp --header 'Authorization: your-value'

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "synap": {
      "url": "https://pool.linkrra.com/mcp",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "synap": {
      "type": "http",
      "url": "https://pool.linkrra.com/mcp",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

Authorization secret HTTP header
Bearer . Only needed for synap_chat_completion; listing models and estimating cost work without it.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

! Caution
Maker matches the repo
The publisher (linkrra.com) is not the repo owner (jimmyplup); someone else may have listed it
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Chat & emaili

More stars than 0% of the other 1769 servers in this category
Published to the registry more recently than 57% of the other 1769 servers in this category
Basic checks equal to or better than 36% of the other 1769 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Synap safe?

It passed 0 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: Authorization

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.2.0) reached the registry 21 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Vexa, emailmd, MCP WhatsApp Cloud

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Vexa

by Vexa-ai

Meeting bot and transcripts for Google Meet, Teams and Zoom. Live or after, speakers labelled.

Runs in the cloud★ 2,949Apache-2.0Updated 2 months ago

Install

emailmd

by anypost

Render markdown into email-safe HTML, lint drafts for deliverability problems, and preview emails.

Computer or cloud★ 1,385MITUpdated 31 days ago

Install

MCP WhatsApp Cloud

by codespar

MCP server for WhatsApp Cloud API (Meta) — messages, media, and templates via Graph API

Runs on your computer★ 277MITUpdated 5 months ago

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Synap MCP server

Synap by Linkrra as a Model Context Protocol server: open models behind one OpenAI-compatible API. Your agent can list the models we serve, read their prices and limits, estimate the cost of a job before running it, and run a chat completion.

There is one server, hosted at https://pool.linkrra.com/mcp (Streamable HTTP). It is the server behind com.linkrra/synap in the official MCP registry.

This repository has two parts:

routes.js is the deployed router itself, byte for byte.
bin/synap-mcp.js is the stdio transport (npx synap-mcp) for MCP hosts that launch a local command. It sends every message to the hosted server unchanged, so it always exposes the same tools as the hosted server.

Tools

Tool	Cost	Key needed
`synap_list_models`	free	no
`synap_get_model`	free	no
`synap_estimate_cost`	free	no
`synap_chat_completion`	billed per prompt and completion token	yes

Model ids are the ones synap_list_models returns. Pass synap-v1 and Synap picks the cheapest model that can do the job.

Connect

Hosted (Streamable HTTP), no install needed

"mcpServers": { "synap": { "type": "http", "url": "https://pool.linkrra.com/mcp", "headers": { "Authorization": "Bearer YOUR_SYNAP_API_KEY" } } } }

Local stdio (Claude Desktop, Cursor, Cline, Windsurf, Zed)

"mcpServers": { "synap": { "command": "npx", "args": ["-y", "synap-mcp"], "env": { "SYNAP_API_KEY": "YOUR_SYNAP_API_KEY" } } } }

Without a key, the three free tools still work. synap_chat_completion returns an error and nothing is charged.

Variable	Meaning
`SYNAP_API_KEY`	Your Synap key, sent as `Authorization: Bearer`. Get one at https://synap.linkrra.com.
`SYNAP_MCP_URL`	Optional. Overrides the endpoint (default `https://pool.linkrra.com/mcp`).

Use it from goose

A ready-made goose custom-provider file lives in goose/. Download goose/linkrra.json into ~/.config/goose/custom_providers/, set LINKRRA_API_KEY, and pick Linkrra (Synap) as the provider. Full setup steps and the model table: goose/README.md.

Paying

API key (MCP and REST). Top up a Synap account by card or crypto. Each call is billed per token against that balance. MCP always uses this method.
x402, no account. An agent with a USDC wallet on Base can pay per call over plain HTTP at POST https://pool.linkrra.com/api/billing/x402/chat/completions. An unpaid request returns 402 with the payment terms. This route is part of the REST API, not an MCP tool. Its settlement is independently verified on PayAPI Market.

Protocol

The hosted server speaks both MCP eras:

2026-07-28 (current): stateless. It implements server/discover and reads the per-request _meta protocol version. It checks that MCP-Protocol-Version, Mcp-Method and Mcp-Name match the request body. Results carry resultType, and list results also carry ttlMs and cacheScope.
2025-11-25, 2025-06-18, 2025-03-26, 2024-11-05: the initialize handshake.

The bridge works with both. For a legacy client, it remembers the version agreed during initialize. For a 2026-07-28 client, it copies the _meta version into the HTTP headers that the Streamable HTTP transport requires.

The API behind it

https://pool.linkrra.com/v1 is an OpenAI-compatible API. On every self-hosted model it supports tool calling (tools, tool_choice) and structured outputs (response_format json_object / json_schema). Requests can be streamed or not. Prompts and completions are not stored.

Auth

The server passes your key through and nothing else. The key travels in the standard Authorization: Bearer header, the same way it would on a direct call to /v1/chat/completions. routes.js forwards that header untouched. The server never reads, stores or creates a key.

Run the server standalone

npm install && npm start     # serves :8080/mcp

Develop

npm test     # offline: a local mock checks the bridge's headers for both protocol eras

The stdio bridge needs Node 18 or later and has no dependencies.

License

Apache-2.0

Synap

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Chat & emaili

Common questions

Alternatives

Vexa

emailmd

MCP WhatsApp Cloud

README from the maker

Synap MCP server

Tools

Connect

Hosted (Streamable HTTP), no install needed

Local stdio (Claude Desktop, Cursor, Cline, Windsurf, Zed)

Use it from goose

Paying

Protocol

The API behind it

Auth

Run the server standalone

Develop

License