Amazing Marvin

Use Amazing Marvin from ChatGPT Desktop or Claude Desktop through a local MCP server.

Connect with Claude Desktop

1. Download amazing-marvin.mcpb.

2. Click the downloaded file to open it in Claude Desktop.

3. Paste API_TOKEN from Amazing features → Integrations → API. Do not use FULL_ACCESS_TOKEN.

The extension includes its JavaScript runtime dependencies. It needs no Git, Python, Homebrew, npm, terminal or hosted service. It currently supports macOS.

Related MCP server: Amazing Marvin MCP Server

Connect ChatGPT Desktop

Install Node.js 20 or later, then add a custom MCP server with these fields:

• Name: Amazing Marvin

• Type: STDIO

• Command to launch: npx --yes github:alejoacelas/amazing-marvin-mcp#v0.3.2

• Environment variable: AMAZING_MARVIN_API_TOKEN = the limited API_TOKEN from Amazing features → Integrations → API

Leave arguments, environment-variable passthrough and working directory blank. Save the server, enable it in a new chat, and ask: “Test my Amazing Marvin connection.” Do not use FULL_ACCESS_TOKEN.

npx downloads this repository and starts its MCP server; the user does not need to clone it or find server.js. The API token remains necessary because Amazing Marvin does not provide delegated sign-in for this API.

Install from source

git clone https://github.com/alejoacelas/amazing-marvin-mcp.git
cd amazing-marvin-mcp
npm ci

Configure an MCP client to run node /absolute/path/to/amazing-marvin-mcp/server.js with AMAZING_MARVIN_API_TOKEN set to the limited token. Set AMAZING_MARVIN_ENABLE_BETA_READS=true to expose the optional experimental reads.

Tools

Nine tools use endpoints Amazing Marvin labels stable:

• test the token;

• read scheduled work, due work, categories, labels, goals and the tracked item;

• create tasks and projects.

The installer’s Enable experimental features switch adds five tested reads: account identity, direct open children, time blocks, tracking history and kudos. See endpoint support for measured behavior and exclusions.

Data and access

The extension runs locally, but tool results enter the Claude conversation. The limited token grants broad Marvin read access plus task and project creation. Claude Desktop masks the token; this server never logs it. Uninstalling the extension does not revoke the token. Rotate it in Amazing Marvin when needed.

Develop

npm ci
npm test
npm run smoke
npm run smoke:legacy
npm audit --omit=dev
./scripts/build.sh

The build writes dist/amazing-marvin-<version>.mcpb. The construction and release checks are in reproduce/README.md.

Amazing Marvin API documentation: Marvin API wiki.