More assistants

More assistants

These assistants have no Twelfth listing to install from, but each one can add
Twelfth as a custom remote MCP connector and sign in to it. You give the
assistant one address:

https://api.twelfth.ai/mcp

The assistant then opens Twelfth in your browser. Sign in, choose the workspace
and the tools to allow, and select Allow access. The connection reads as
you, within your workspace role and remits, and no key is copied anywhere. It
reads by default; it can change things only if you tick
Allow changes on the
consent screen. End it from Settings → AI & agents in Twelfth.

The steps below were checked against each vendor’s own documentation on
2026-10-19. Menus move; if a label differs, look for “connectors”, “MCP
servers” or “custom connector” in the assistant’s settings.

If you are signed out of Twelfth, it asks you to sign in first. You need an
existing account in a workspace; to get one, book a demo.

Perplexity

Custom connectors are on Pro, Max and Enterprise. On Enterprise an admin has to
turn on Allow members to add custom connectors first.

  1. In Perplexity, open Customize → Connectors (or Plugins in the sidebar), then Add custom → Connector → Add MCP connector.
  2. Choose Remote. Set Name to Twelfth, MCP Server URL to https://api.twelfth.ai/mcp, Authentication to OAuth and Transport to Streamable HTTP. Leave the client ID and secret empty.
  3. Tick the acknowledgement and select Add.
  4. Select the new Twelfth card to sign in to Twelfth.

An Enterprise admin can add it for the whole organisation from Enterprise
settings → Permissions → Connectors permissions → Custom connector.
Perplexity’s guide.

Mistral Le Chat

Only an admin can add a custom connector. On a personal plan, that is you.

  1. In Le Chat, open Connectors and select Add Connector.
  2. On the Custom MCP Connector tab, set the name to twelfth (no spaces) and the server URL to https://api.twelfth.ai/mcp.
  3. Select Connect. Le Chat detects that Twelfth uses OAuth and opens the sign-in.

Le Chat uses Twelfth’s tools. It doesn’t yet use MCP prompts or resources.
Mistral’s guide.

Grok

  1. Open grok.com/connectors and select New Connector, then Custom.
  2. Enter https://api.twelfth.ai/mcp and save.
  3. Complete the sign-in Grok asks for.

On Grok Business and Enterprise, a team admin adds the connector first, in the
xAI console under Grok Business → Connectors → Add Connector → Other. If
Grok does not offer a sign-in, connect with a workspace key instead: see
Grok. xAI’s guide.

Gemini Enterprise

Gemini Enterprise needs an admin, and it does not register itself with Twelfth
the way most assistants do. It asks for a client ID and secret made for its
redirect address, https://vertexaisearch.cloud.google.com/oauth-redirect.

  1. Email hello@twelfth.ai to ask for a client ID and secret for Gemini Enterprise. Keep them in Google’s form only.
  2. In the Google Cloud console, open Gemini Enterprise, then your app’s Data stores → Create data store, and search for Custom MCP Server.
  3. Select Add MCP server. Set the server URL to https://api.twelfth.ai/mcp, the authorization URL to https://api.twelfth.ai/api/auth/oauth2/authorize and the token URL to https://api.twelfth.ai/api/auth/oauth2/token. Paste the client ID and secret, set the scopes to openid profile email offline_access, and tick Enable PKCE Support.
  4. Select Verify Auth, sign in to Twelfth, then Continue and Create.
  5. Under Actions, select Reload custom actions, then enable the Twelfth actions.

Organisations that govern MCP servers through Agent Registry can register the
same server there and add it from Connected data stores → New data store →
MCP servers. Google’s guide.

Amazon Quick

Needs an Amazon Quick Enterprise subscription.

  1. In Amazon Quick, open Connectors, go to Create for your team and choose Model Context Protocol (MCP).
  2. Set the name to Twelfth, the MCP server endpoint to https://api.twelfth.ai/mcp, and the connection type to Public network. Select Next.
  3. Choose user authentication, then Create and continue. Each person signs in to Twelfth the first time they use it.
  4. Share the connector with the people who should use it.

Quick does not pick up new tools by itself. Select Sync on the connector
after Twelfth adds tools. Amazon’s guide.

Kiro

Kiro (formerly Amazon Q Developer) reads MCP servers from
.kiro/settings/mcp.json in a project, or ~/.kiro/settings/mcp.json for
every project:

{
  "mcpServers": {
    "twelfth": { "url": "https://api.twelfth.ai/mcp" }
  }
}

Save the file. Kiro opens the Twelfth sign-in the first time it uses the
server. Kiro’s guide.

JetBrains Junie

Junie reads .junie/mcp/mcp.json in a project, or ~/.junie/mcp/mcp.json for
every project, in both the CLI and the IDE plugin:

{
  "mcpServers": {
    "twelfth": { "url": "https://api.twelfth.ai/mcp" }
  }
}

The server shows Authorization required. Open its menu, select
Authorize, and sign in to Twelfth in the browser. The status changes to
Active. JetBrains’ guide.

VS Code

See VS Code / Copilot for the
one-click install. To add it by hand, run MCP: Add Server from the command
palette, choose HTTP, enter https://api.twelfth.ai/mcp, and name it
twelfth.

Zed

  1. Open Settings → AI → MCP Servers and select Add Server → Add Remote Server.

  2. Or add it to settings.json yourself:

    {
  "context_servers": {
    "twelfth": { "url": "https://api.twelfth.ai/mcp" }
  }
}

  3. Zed opens the Twelfth sign-in, because the server has no authorization header set.

Zed’s guide.

Warp

  1. Open Settings → Agents → MCP servers and select Add.

  2. Choose Streamable HTTP or SSE Server (URL) and paste:

    {
  "mcpServers": {
    "twelfth": { "url": "https://api.twelfth.ai/mcp" }
  }
}

  3. Start the server. Warp opens the Twelfth sign-in and keeps the credentials on your device.

Warp’s cloud agents can’t run a sign-in themselves. Use Twelfth from Warp on
your own machine. Warp’s guide.

Goose

In Goose Desktop, open Extensions → Add custom extension, set the type to
Streamable HTTP, the name to Twelfth and the URL to
https://api.twelfth.ai/mcp, then select Add. In the Goose CLI, run
goose configure, choose Add Extension → Remote Extension (Streamable
HTTP) and enter the same URL. Goose opens the Twelfth sign-in the first time
it uses the extension. Goose’s guide.

Not covered

  • Manus documents only API keys and bearer tokens for custom MCP servers. An owner or admin can still connect it with a workspace key.
  • JetBrains AI Assistant documents no sign-in for remote MCP servers. Use Junie, above.
  • The xAI API’s remote MCP tool takes a bearer token, so it needs a workspace key: see Grok.
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