communication

courier-mcp▌

by trycourier

Official MCP server for Courier's notification API, providing 60 tools to send messages, manage user profiles, configure

Official MCP server for Courier's notification API, providing 60 tools to send messages, manage user profiles, configure lists, debug deliveries, and handle notification workflows.

github stars

★ 1

GitHub npm

best for

/ General purpose MCP workflows

capabilities

/ send_message
/ send_message_template
/ send_message_to_list
/ list_messages
/ get_message
/ cancel_message

what it does

Official MCP server for Courier's notification API, providing 60 tools to send messages, manage user profiles, configure lists, debug deliveries, and handle notification workflows.

about

courier-mcp is a community-built MCP server published by trycourier that provides AI assistants with tools and capabilities via the Model Context Protocol. Official MCP server for Courier's notification API, providing 60 tools to send messages, manage user profiles, configure It is categorized under communication. This server exposes 20 tools that AI clients can invoke during conversations and coding sessions.

how to install

You can install courier-mcp in your AI client of choice. Use the install panel on this page to get one-click setup for Cursor, Claude Desktop, VS Code, and other MCP-compatible clients. This server runs locally on your machine via the stdio transport.

license

MIT

courier-mcp is released under the MIT license. This is a permissive open-source license, meaning you can freely use, modify, and distribute the software.

readme

Courier MCP Server

The official Model Context Protocol (MCP) server for the Courier notification API. It gives AI agents full access to the Courier API — send messages, manage profiles, debug deliveries, configure lists, and more — through 60 tools backed by the @trycourier/courier Node SDK.

Install

Hosted (recommended)

Courier runs a hosted MCP server at https://mcp.courier.com. No local setup required.

Cursor — add to .cursor/mcp.json:

{
  "mcpServers": {
    "courier": {
      "url": "https://mcp.courier.com",
      "headers": {
        "api_key": "YOUR_COURIER_API_KEY"
      }
    }
  }
}

Claude Code:

claude mcp add courier --transport http --url https://mcp.courier.com --header "api_key: YOUR_COURIER_API_KEY"

Claude Desktop — add to claude_desktop_config.json:

{
  "mcpServers": {
    "courier": {
      "url": "https://mcp.courier.com",
      "headers": {
        "api_key": "YOUR_COURIER_API_KEY"
      }
    }
  }
}

Local development

git clone https://github.com/trycourier/courier-mcp.git
cd courier-mcp
sh dev.sh

Then point your IDE at http://localhost:3000 with the same config format above.

Tools

59 default tools organized by API resource, plus 1 diagnostic tool available in local installs.

Default tools

Category	Tools
Send	`send_message`, `send_message_template`, `send_message_to_list`, `send_message_to_list_template`
Messages	`list_messages`, `get_message`, `get_message_content`, `get_message_history`, `cancel_message`
Profiles	`get_user_profile_by_id`, `create_or_merge_user`, `replace_profile`, `delete_profile`, `get_user_list_subscriptions`, `subscribe_user_to_lists`, `delete_user_list_subscriptions`
Lists	`list_lists`, `get_list`, `get_list_subscribers`, `create_list`, `subscribe_user_to_list`, `unsubscribe_user_from_list`
Audiences	`get_audience`, `list_audience_members`, `list_audiences`, `update_audience`, `delete_audience`
Notifications	`list_notifications`, `get_notification_content`, `get_notification_draft_content`
Brands	`create_brand`, `get_brand`, `list_brands`
Auth	`generate_jwt_for_user`
User Tokens	`list_user_push_tokens`, `get_user_push_token`, `create_or_replace_user_push_token`
Docs	`courier_installation_guide`
Automations	`invoke_automation_template`, `invoke_ad_hoc_automation`
Bulk	`create_bulk_job`, `add_bulk_users`, `run_bulk_job`, `get_bulk_job`, `list_bulk_users`
Audit Events	`get_audit_event`, `list_audit_events`
Inbound	`track_inbound_event`
Tenants	`get_tenant`, `create_or_update_tenant`, `list_tenants`, `delete_tenant`
Users	`get_user_preferences`, `update_user_preference_topic`, `list_user_tenants`, `add_user_to_tenant`, `remove_user_from_tenant`
Translations	`get_translation`, `update_translation`

Diagnostic tools (local only)

Category	Tools
Config	`get_environment_config` — check which API key, base URL, and package version the MCP session is using

Architecture

courier-mcp/
├── mcp/                    # MCP package (@trycourier/courier-mcp on npm)
│   └── src/
│       ├── index.ts        # CourierMcp server class
│       ├── tools/          # Tool definitions (one file per API resource)
│       └── utils/          # Config, error handling, registry
├── server/                 # Express server (hosts the MCP package via HTTP)
│   └── src/index.ts        # Stateless HTTP handler
└── dev.sh                  # Local development launcher

The MCP package uses the official @trycourier/courier Node SDK (Stainless-generated) for all API calls. The SDK stays in sync with the Courier API spec automatically, so tool implementations are thin wrappers with proper error handling.

Configuration

Header	Required	Description
`api_key`	Yes	Your Courier API key. Get one at app.courier.com/settings/api-keys.
`base_url`	No	Override the API base URL. Defaults to `https://api.courier.com`.

Development

# Install dependencies
cd mcp && npm install && cd ../server && npm install && cd ..

# Start development server
sh dev.sh

# Run tests
cd mcp && npm test

# Build
cd mcp && npm run build

SDK dependency updates

The @trycourier/courier SDK dependency in mcp/ is updated automatically via Dependabot. Dependabot checks npm daily and opens a PR when a new SDK version is available.

Patch/minor bumps: review CI status, then merge.
Major bumps (labeled breaking-review): check whether any tool input schemas or error handling need updates before merging.

After merging a Dependabot PR, the full pipeline runs automatically:

auto-version-bump.yml bumps the MCP package patch version and pushes to main.
publish-npm.yml publishes the new version to npm.
bump-services.yml opens a PR in trycourier/services to update the hosted MCP server.

Secrets required (set in repo Settings > Secrets and variables > Actions):

REPO_TOKEN — PAT with Contents: Read and write on this repo. Used by auto-version-bump.yml to push to main and trigger downstream workflows.
SERVICES_REPO_TOKEN — PAT with Contents: Read and write + Pull requests: Read and write on trycourier/services. Used by bump-services.yml to open dependency bump PRs.
NPM_TOKEN — npm publish token. Used by publish-npm.yml.