Connectors Guide

Connector from the MCP registry

Stable Baseline

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The address

https://api.stablebaseline.io/functions/v1/cloud-serve/mcp
Transport
Streamable HTTP
Sign-in
A key in the Authorization header, written Bearer YOUR_KEY. The publisher says: "Bearer token. Either an MCP API key with prefix 'sta_' (mint at https://app.stablebaseline.io/settings/developers) or an OAuth 2.1 access token. Every OAuth endpoint lives under the cloud-serve function, and the authoritative list is published at https://api.stablebaseline.io/functions/v1/cloud-serve/.well-known/oauth-authorization-server: authorise at https://api.stablebaseline.io/functions/v1/cloud-serve/oauth/authorize, token endpoint https://api.stablebaseline.io/functions/v1/cloud-serve/oauth/token, dynamic client registration at https://api.stablebaseline.io/functions/v1/cloud-serve/oauth/register."
Published by
stablebaseline.io (domain checked by the registry)
Registry name
io.stablebaseline/sb, version 1.0.4
In the registry since
6 May 2026

How to add Stable Baseline to Claude

  1. In Claude on the web or desktop, open Customize, then Connectors (Settings > Connectors in some versions).
  2. Press + Add, then Add custom connector.
  3. Name it Stable Baseline, paste the address and press Continue.
  4. Under Request headers, add the header Authorization with the value Bearer YOUR_KEY, your key in place of YOUR_KEY. Press Add.
  5. Press Connect next to it and sign in if it asks.
  6. In a chat, press +, then Connectors, to switch it on.

On your phone: connectors belong to your Claude account. Add it once on claude.ai or in the desktop app, and it is in the Claude app for iPhone and Android too: in a chat, press +, then Connectors, and switch it on.

Claude's free plan allows one custom connector; paid plans allow more. On Team and Enterprise plans an owner adds it once under Organization settings > Connectors, and each member then presses Connect. Claude's help page

How to add it to ChatGPT

  1. On chatgpt.com, on a Plus, Pro, Business, Enterprise or Edu plan, turn on Developer mode (Settings > Security and login, or Settings > Apps > Advanced settings in some versions).
  2. Open Settings > Apps and create an app (the + or Create button).
  3. Name it Stable Baseline, paste the address, choose OAuth (or No authentication if the server is open) and press Create.
  4. Sign in when it asks.
  5. In a new chat, press + and pick Stable Baseline.

This server asks for a key in a header. ChatGPT's custom apps sign in with OAuth or no authentication, so it may not connect there.

ChatGPT's menus move now and then; the idea stays the same: a new app, this address, OAuth. On business plans an admin may have to allow custom apps first.

Claude Code

claude mcp add --transport http stable-baseline https://api.stablebaseline.io/functions/v1/cloud-serve/mcp --header "Authorization: Bearer YOUR_KEY"

Put your key in place of YOUR_KEY.

Source

This page is made from the official MCP registry on 30 October 2026 and has not been checked by hand. A connector acts as you: check who publishes it before you connect anything that can change your data.