feat(third_party): add Basecamp plugin

.cursor-plugin/marketplace.json

@@ -547,6 +547,11 @@
       "name": "finary",
       "source": "third_party/finary",
       "description": "Read your net worth, accounts, holdings, spending, and budgets."
+    },
+    {
+      "name": "basecamp",
+      "source": "third_party/basecamp",
+      "description": "Find, read, and update projects, to-dos, cards, messages, docs, and schedules."
     }
   ]
 }

README.md

@@ -100,6 +100,7 @@ Official Cursor plugins for popular developer tools, frameworks, and SaaS produc
 | `tailscale` | [Tailscale](third_party/tailscale/) | Cursor | Integrations | Let Grok Bot reach MCP servers on your private Tailscale network. Sign in to Tailscale to connect your tailnet; Grok Bot joins it as one tagged device and only reaches the hosts you grant to tag:grokbot. |
 | `highlevel` | [HighLevel](third_party/highlevel/) | Cursor | Integrations | Work with contacts, conversations, opportunities, calendars, and payments. |
 | `finary` | [Finary](third_party/finary/) | Cursor | Integrations | Read your net worth, accounts, holdings, spending, and budgets. |
+| `basecamp` | [Basecamp](third_party/basecamp/) | Cursor | Integrations | Find, read, and update projects, to-dos, cards, messages, docs, and schedules. |
 Author values match each plugin’s `plugin.json` `author.name` (Cursor lists `plugins@cursor.com` in the manifest).
 
 ## Repository structure

third_party/basecamp/.cursor-plugin/plugin.json

@@ -0,0 +1,38 @@
+{
+  "name": "basecamp",
+  "displayName": "Basecamp",
+  "version": "1.0.0",
+  "minClientVersions": {
+    "cursor": "3.13.0"
+  },
+  "description": "Find, read, and update projects, to-dos, cards, messages, docs, and schedules.",
+  "author": {
+    "name": "Cursor",
+    "email": "plugins@cursor.com"
+  },
+  "homepage": "https://basecamp.com/ai",
+  "repository": "https://github.com/cursor/plugins",
+  "license": "MIT",
+  "logo": "assets/logo.png",
+  "keywords": [
+    "basecamp",
+    "37signals",
+    "projects",
+    "to-dos",
+    "todos",
+    "cards",
+    "messages",
+    "campfire",
+    "project management",
+    "productivity",
+    "mcp"
+  ],
+  "category": "integrations",
+  "tags": [
+    "basecamp",
+    "project management",
+    "productivity",
+    "mcp"
+  ],
+  "mcpServers": "./mcp.json"
+}

third_party/basecamp/CHANGELOG.md

@@ -0,0 +1,9 @@
+# Changelog
+
+All notable changes to this plugin will be documented here.
+
+## 1.0.0 — initial release
+
+- Added the `basecamp` MCP server pointing at `https://mcp.basecamp.com/mcp`, with `"placement": "server"` so Grok Bot dials it through the hosted MCP path.
+- Auth uses OAuth — no API key or client ID to configure.
+- Logo: Basecamp's official mark (https://basecamp.com/brand/basecamp-logo-white-plate.png).

third_party/basecamp/LICENSE

@@ -0,0 +1,24 @@
+MIT License
+
+Copyright (c) 2026 Cursor
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+The Basecamp name and logo are trademarks of 37signals, LLC and are not
+licensed under this license.

third_party/basecamp/README.md

@@ -0,0 +1,59 @@
+# Basecamp
+
+Cursor plugin that connects agents to [Basecamp](https://basecamp.com) through Basecamp's official remote [Model Context Protocol](https://modelcontextprotocol.io/) server, built and run by 37signals.
+
+Find, read, and update projects, to-dos, cards, messages, comments, documents, schedules, check-ins, and Campfire chats in the signed-in Basecamp account.
+
+## Install
+
+1. Open **Cursor Settings → Plugins**.
+2. Search for **Basecamp**.
+3. Click **Install**, then complete the Basecamp sign-in prompt.
+
+Or run `/add-plugin basecamp` in chat.
+
+## MCP
+
+```json
+{
+  "mcpServers": {
+    "basecamp": {
+      "type": "http",
+      "url": "https://mcp.basecamp.com/mcp",
+      "placement": "server"
+    }
+  }
+}
+```
+
+Auth is OAuth 2.1 with Dynamic Client Registration and PKCE. Cursor registers itself and prompts for Basecamp sign-in when the plugin connects — there is no API key or client ID to configure. On the consent screen you choose the Basecamp account and Read-only or Full access.
+
+## What agents can do
+
+| Category | Capabilities |
+| --- | --- |
+| My work | Assignments, Hey! notifications, schedule, and what's new across projects |
+| To-dos and cards | Create, assign, complete, and move to-dos and Card Table cards |
+| Messages and docs | Read and post messages, comments, and documents |
+| Schedules, check-ins, and chat | Add schedule entries, read and answer check-ins, and read and post in Campfire |
+| Search | `search` across the account and `get_by_url` for any Basecamp link |
+
+Every Basecamp operation is its own tool, annotated read-only, additive (creates) or destructive. The hosted runtime is the source of truth for tool names and schemas.
+
+## Notes
+
+- Tool calls run as the Basecamp person who authorizes the connection, with their permissions.
+- Most removals go to the Basecamp trash, where they can be restored. Permanent deletes ask for confirmation where the client supports it.
+- Disconnect any time from **Connected apps** in your Basecamp profile menu.
+
+## Docs
+
+- Basecamp and AI assistants: https://basecamp.com/ai
+- Server URL: https://mcp.basecamp.com/mcp
+- Basecamp CLI and agent skill: https://github.com/basecamp/basecamp-cli
+
+Logo is Basecamp's official mark (https://basecamp.com/brand/basecamp-logo-white-plate.png).
+
+## License
+
+MIT. The Basecamp name and logo are trademarks of 37signals, LLC and aren't licensed under it.

third_party/basecamp/mcp.json

@@ -0,0 +1,9 @@
+{
+  "mcpServers": {
+    "basecamp": {
+      "type": "http",
+      "url": "https://mcp.basecamp.com/mcp",
+      "placement": "server"
+    }
+  }
+}