diff --git a/.env.example b/.env.example
index f8f1558..18ea5c0 100644
--- a/.env.example
+++ b/.env.example
@@ -1,2 +1,12 @@
 # Basecamp API Credentials
-BASECAMP_API_KEY=your-api-key-here
+# Get these from: https://launchpad.37signals.com/integrations
+
+# OAuth 2.0 Access Token (get via OAuth flow)
+BASECAMP_ACCESS_TOKEN=your-oauth-token-here
+
+# Your Account ID (from URL: https://3.basecamp.com/{ACCOUNT_ID}/)
+BASECAMP_ACCOUNT_ID=your-account-id-here
+
+# User-Agent identifier (required by Basecamp API)
+# Format: "AppName (contact@email.com)"
+BASECAMP_APP_IDENTITY="MCPServer (mcp@example.com)"
diff --git a/README.md b/README.md
index a439a94..65946b1 100644
--- a/README.md
+++ b/README.md
@@ -4,32 +4,39 @@
 
 ---
 
-# 🚀 Basecamp MCP Server — 2026 Complete Version
+# 📊 Basecamp MCP Server — 2026 Complete Version
 
 ## 💡 What This Unlocks
 
-**This MCP server gives AI direct access to your entire Basecamp workspace.** Instead of clicking through interfaces, you just *tell* it what you need.
+**This MCP server gives AI direct access to your Basecamp workspace.** Instead of manually clicking through projects and to-dos, you just *tell* the AI what you need.
 
-### 🎯 Basecamp-Native Power Moves
+### 🎯 Team Collaboration Power Moves
 
 The AI can directly control your Basecamp account with natural language:
 
-- **Smart automation** — Complex workflows in plain English
-- **Data intelligence** — Query, analyze, and export your Basecamp data
-- **Rapid operations** — Bulk actions that would take hours manually
-- **Cross-platform integration** — Combine Basecamp with other tools seamlessly
+1. **Project Intelligence** — "Show me all active projects" or "Get full details on the Q1 Launch project including tools and team"
+2. **Smart Task Management** — "List all incomplete to-dos in the Engineering project" or "Create 5 new tasks for the design sprint with due dates"
+3. **Instant Updates** — "Post a message to the Marketing project board about today's campaign results"
+4. **Team Coordination** — "List all team members in the Q2 Planning project" or "Show me who's assigned to incomplete tasks"
+5. **Bulk Operations** — "Mark all overdue to-dos as complete" or "Create to-dos from a list of requirements"
 
 ### 🔗 The Real Power: Combining Tools
 
 AI can chain multiple Basecamp operations together:
 
-- Query data → Filter results → Generate reports
-- Search records → Update fields → Notify team
-- Analyze metrics → Create tasks → Schedule follow-ups
+- Query projects → List to-dos → Identify blockers → Post status update
+- Pull team members → Check task assignments → Balance workload
+- Analyze completed tasks → Generate progress report → Share with stakeholders
+- Create to-dos from meeting notes → Assign team members → Set deadlines
 
 ## 📦 What's Inside
 
-**52 API tools** covering the entire Basecamp platform (Project Management).
+**8 powerful API tools** covering core Basecamp operations:
+
+- **Projects**: `list_projects`, `get_project`
+- **To-Dos**: `list_todos`, `create_todo`, `complete_todo`
+- **Messages**: `list_messages`, `create_message`
+- **People**: `list_people`
 
 All with proper error handling, automatic authentication, and TypeScript types.
 
@@ -45,7 +52,11 @@ All with proper error handling, automatic authentication, and TypeScript types.
    npm run build
    ```
 
-2. **Get your Basecamp API credentials** (see Authentication section below)
+2. **Get your Basecamp API credentials:**
+   - Go to [Basecamp Launchpad](https://launchpad.37signals.com/integrations)
+   - Create a new OAuth 2.0 app (or use existing)
+   - Complete the OAuth flow to get an access token
+   - Find your Account ID in your Basecamp URL: `https://3.basecamp.com/{ACCOUNT_ID}/`
 
 3. **Configure Claude Desktop:**
    
@@ -58,9 +69,11 @@ All with proper error handling, automatic authentication, and TypeScript types.
      "mcpServers": {
        "basecamp": {
          "command": "node",
-         "args": ["/ABSOLUTE/PATH/TO/basecamp-mcp/dist/index.js"],
+         "args": ["/ABSOLUTE/PATH/TO/basecamp-mcp-2026-complete/dist/index.js"],
          "env": {
-           "BASECAMP_API_KEY": "your-api-key-here"
+           "BASECAMP_ACCESS_TOKEN": "your-oauth-token-here",
+           "BASECAMP_ACCOUNT_ID": "your-account-id-here",
+           "BASECAMP_APP_IDENTITY": "YourAppName (contact@yourdomain.com)"
          }
        }
      }
@@ -74,7 +87,7 @@ All with proper error handling, automatic authentication, and TypeScript types.
 [![Deploy on Railway](https://railway.app/button.svg)](https://railway.app/template/basecamp-mcp)
 
 1. Click the button above
-2. Set your Basecamp API credentials in Railway dashboard
+2. Set `BASECAMP_ACCESS_TOKEN`, `BASECAMP_ACCOUNT_ID`, and `BASECAMP_APP_IDENTITY` in Railway dashboard
 3. Use the Railway URL as your MCP server endpoint
 
 ### Option 3: Docker
@@ -82,32 +95,70 @@ All with proper error handling, automatic authentication, and TypeScript types.
 ```bash
 docker build -t basecamp-mcp .
 docker run -p 3000:3000 \
-  -e BASECAMP_API_KEY=your-key \
+  -e BASECAMP_ACCESS_TOKEN=your-token \
+  -e BASECAMP_ACCOUNT_ID=your-account-id \
+  -e BASECAMP_APP_IDENTITY="MyApp (me@example.com)" \
   basecamp-mcp
 ```
 
 ## 🔐 Authentication
 
-See the official [Basecamp API documentation](https://docs.basecamp.com) for authentication details.
+Basecamp uses **OAuth 2.0** authentication with account-specific access tokens.
 
-The MCP server handles token refresh automatically.
+**Required credentials:**
+- `BASECAMP_ACCESS_TOKEN` — OAuth 2.0 access token from Basecamp Launchpad
+- `BASECAMP_ACCOUNT_ID` — Your account ID (from URL: `https://3.basecamp.com/{ACCOUNT_ID}/`)
+- `BASECAMP_APP_IDENTITY` — User-Agent identifier: `"AppName (contact@email.com)"` (required by Basecamp API)
 
-## 🎯 Example Prompts
+**Setting up OAuth 2.0:**
+1. Visit [Basecamp Launchpad](https://launchpad.37signals.com/integrations)
+2. Register your application
+3. Complete the OAuth flow to get an access token
+4. Store the token securely (it doesn't expire but can be revoked)
 
-Once connected to Claude, you can use natural language. Examples:
+**Official docs:** [Basecamp 4 API Authentication](https://github.com/basecamp/bc3-api/blob/master/sections/authentication.md)
 
-- *"Show me recent activity in Basecamp"*
-- *"Create a new record with these details..."*
-- *"Export all data from last month"*
-- *"Update the status of X to Y"*
-- *"Generate a report of..."*
+The MCP server handles API routing and authentication headers automatically.
+
+## 🎯 Example Prompts for Claude
+
+Once connected, you can use natural language to manage your projects:
+
+**Project Management:**
+- *"Show me all active projects"*
+- *"Get details for the Q1 Launch project including all tools and team members"*
+- *"List archived projects from last year"*
+
+**Task Management:**
+- *"Show me all incomplete to-dos in the Engineering project"*
+- *"Create a new to-do: 'Review design mockups' in the Design to-do list, assign to Sarah, due Friday"*
+- *"Mark to-do #12345 as complete"*
+- *"List all overdue tasks across all projects"*
+
+**Team Communication:**
+- *"Post a message to the Marketing project board: 'Campaign launched successfully, tracking metrics'"*
+- *"List recent messages in the Product Development project"*
+- *"Create an announcement about tomorrow's team meeting"*
+
+**Team Coordination:**
+- *"Show me all people in the Q2 Planning project"*
+- *"List all team members across the account"*
+- *"Find who's assigned to incomplete tasks in Engineering"*
+
+**Bulk Operations:**
+- *"Create 10 to-dos from this requirements list and assign them to different team members"*
+- *"Generate a project status report by pulling all completed tasks from last week"*
+
+**Combined Operations:**
+- *"Check all projects → identify incomplete to-dos → post a summary message to each project"*
+- *"Pull team members → analyze task distribution → suggest workload rebalancing"*
 
 ## 🛠️ Development
 
 ### Prerequisites
 - Node.js 18+
 - npm or yarn
-- Basecamp account with API access
+- Basecamp 4 account with API access
 
 ### Setup
 
@@ -132,9 +183,18 @@ npm run test:coverage     # Coverage report
 ## 🐛 Troubleshooting
 
 ### "Authentication failed"
-- Verify your API credentials are correct
-- Check that your API key hasn't been revoked
-- Ensure you have the necessary permissions
+- Verify your OAuth access token is valid
+- Check that your Account ID matches your Basecamp URL
+- Ensure your token hasn't been revoked (check Launchpad)
+
+### "Missing User-Agent"
+- Basecamp requires a `User-Agent` header in format: `"AppName (contact@email.com)"`
+- Set `BASECAMP_APP_IDENTITY` environment variable with your app details
+
+### "Project/To-Do list not found"
+- Use `list_projects` to get valid project IDs
+- Use `get_project` to find to-do list IDs in the project's "dock"
+- IDs are numeric; ensure you're passing numbers, not strings
 
 ### "Tools not appearing in Claude"
 - Restart Claude Desktop after updating config
@@ -143,7 +203,9 @@ npm run test:coverage     # Coverage report
 
 ## 📖 Resources
 
-- [Basecamp API Documentation](https://docs.basecamp.com)
+- [Basecamp 4 API Documentation](https://github.com/basecamp/bc3-api)
+- [Basecamp Launchpad (OAuth Setup)](https://launchpad.37signals.com/integrations)
+- [Authentication Guide](https://github.com/basecamp/bc3-api/blob/master/sections/authentication.md)
 - [MCP Protocol Specification](https://modelcontextprotocol.io/)
 - [Claude Desktop Documentation](https://claude.ai/desktop)
 
@@ -163,10 +225,10 @@ MIT License - see [LICENSE](LICENSE) for details
 
 ## 🙏 Credits
 
-Built by [MCPEngine](https://mcpengage.com) — AI infrastructure for business software.
+Built by [MCPEngage](https://mcpengage.com) — AI infrastructure for business software.
 
 Want more MCP servers? Check out our [full catalog](https://mcpengage.com) covering 30+ business platforms.
 
 ---
 
-**Questions?** Open an issue or join our [Discord community](https://discord.gg/mcpengine).
+**Questions?** Open an issue or join our [Discord community](https://discord.gg/mcpengage).
diff --git a/package.json b/package.json
index 63d6ff7..68916b5 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "description": "MCP server for Basecamp API - 2026 Complete Version",
   "type": "module",
   "main": "dist/index.js",
-  "author": "MCPEngine <hello@mcpengage.com>",
+  "author": "MCPEngage <hello@mcpengage.com>",
   "license": "MIT",
   "repository": {
     "type": "git",