Initial release v3.3.8
- Hook system for customization - Documentation and installation scripts - Multi-platform support via GitHub releases - Binaries available for Windows, Linux (x64/ARM64), macOS (Intel/Apple Silicon) Generated with Claude Code via Happy
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# MCP Configuration Documentation
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## Source: Official Claude Code Docs v2025
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## Last Verified: 2025-08-31
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## MCP Configuration File Locations
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### User Scope
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- **File**: `~/.claude.json`
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- **Purpose**: User-wide MCP servers available across all projects
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- **Persistence**: Persists across projects
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- **Example Path**: `/Users/username/.claude.json`
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### Project Scope
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- **File**: `./.mcp.json`
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- **Purpose**: Project-specific servers for team collaboration
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- **Persistence**: Checked into version control
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- **Example Path**: `/path/to/project/.mcp.json`
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### Local Scope
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- **Status**: Not officially documented
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- **Implementation**: Currently uses `~/.claude.json` (may need revision)
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## Configuration Structure
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```json
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{
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"mcpServers": {
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"server-name": {
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"command": "command-to-run",
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"args": ["arg1", "arg2"],
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"env": {
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"ENV_VAR": "value"
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}
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}
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}
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}
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```
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## Example Configurations
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### Memory Server (stdio)
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```json
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{
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"mcpServers": {
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"claude-mem": {
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"command": "npx",
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"args": ["-y", "@modelcontextprotocol/server-memory"]
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}
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}
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}
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```
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### HTTP Server
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```json
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{
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"mcpServers": {
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"api-server": {
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"type": "sse",
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"url": "${API_BASE_URL:-https://api.example.com}/mcp",
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"headers": {
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"Authorization": "Bearer ${API_KEY}"
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}
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}
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}
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}
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```
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## Environment Variable Expansion
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MCP configs support environment variable expansion:
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- `${VAR}` - Direct expansion
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- `${VAR:-default}` - With fallback value
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Applicable fields:
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- `command`
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- `args`
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- `env`
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- `url`
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- `headers`
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## CLI Commands
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```bash
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# Add a server
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claude mcp add <name> <command> [args...]
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# Add with scope
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claude mcp add <name> --scope project /path/to/server
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claude mcp add <name> --scope user /path/to/server
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# List servers
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claude mcp list
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# Get server details
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claude mcp get <name>
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# Remove server
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claude mcp remove <name>
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# Check status (within Claude Code)
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/mcp
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```
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## Tool Naming Convention
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MCP tools follow the pattern: `mcp__<serverName>__<toolName>`
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Example:
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- Server: `claude-mem`
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- Tool: `create_entities`
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- Full name: `mcp__claude_mem__create_entities`
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## Security Considerations
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1. **Tool Permissions**: Must explicitly allow MCP tools via `--allowedTools`
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2. **Server Trust**: Only use MCP servers from trusted sources
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3. **Credential Management**: Use environment variables for sensitive data
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4. **Audit Trail**: MCP operations can be monitored via hooks
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## Common Issues
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### Issue: MCP server not connecting
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**Solution**: Check that the command and args are correct, and npx is in PATH
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### Issue: Tools not available
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**Solution**: Ensure server is in allowed list and properly configured
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### Issue: Configuration not loading
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**Solution**: Verify JSON syntax and file location
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## References
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- Official Docs: https://docs.anthropic.com/en/docs/claude-code/mcp
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- MCP Protocol: https://modelcontextprotocol.io/
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