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# MCP proxy for OpenCtx | ||
# MCP Tools Provider for OpenCtx (Work in Progress) | ||
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This is a context provider for [OpenCtx](https://openctx.org) that fetches contents from a [MCP](https://modelcontextprotocol.io) provider for use as context. | ||
This is a context provider for [OpenCtx](https://openctx.org) that enables access to tools exposed by [MCP](https://modelcontextprotocol.io) providers. This provider specifically handles tool interactions - it does not support MCP resources. | ||
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Currently, only MCP over stdio is supported (HTTP is not yet supported). | ||
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## Development | ||
## What This Provider Does | ||
- Connects to MCP providers to expose their available tools | ||
- Validates tool inputs against their schemas | ||
- Executes tool calls and returns results | ||
- Supports tool discovery and filtering via mentions | ||
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1. Clone the [modelcontextprotocol/servers](https://github.com/modelcontextprotocol/servers) repository. Follow the instructions there to build the example providers. This should generate output files of the form `build/${example_name}/index.js`. | ||
1. Run `pnpm watch` in this directory. | ||
1. Add the following to your VS Code settings: | ||
```json | ||
"openctx.providers": { | ||
// ...other providers... | ||
"https://openctx.org/npm/@openctx/provider-modelcontextprotocol": { | ||
"nodeCommand": "node", | ||
"mcp.provider.uri": "file:///path/to/servers/root/build/everything/index.js", | ||
} | ||
} | ||
``` | ||
1. Reload the VS Code window. You should see `servers/everything` in the `@`-mention dropdown. | ||
## Creating MCP Tools | ||
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To hook up to the Postgres MCP provider, use: | ||
To create tools that can be used with this provider, see the [MCP documentation](https://modelcontextprotocol.io) on implementing tool endpoints in your MCP server. | ||
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```json | ||
"openctx.providers": { | ||
// ...other providers... | ||
"https://openctx.org/npm/@openctx/provider-modelcontextprotocol": { | ||
"nodeCommand": "node", | ||
"mcp.provider.uri": "file:///path/to/servers/root/build/postgres/index.js", | ||
"mcp.provider.args": [ | ||
"postgresql://sourcegraph:sourcegraph@localhost:5432/sourcegraph" | ||
] | ||
} | ||
} | ||
``` | ||
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## More MCP Servers | ||
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The following MCP servers are available in the [modelcontextprotocol/servers](https://github.com/modelcontextprotocol/servers) repository: | ||
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- [Brave Search](https://github.com/modelcontextprotocol/servers/tree/main/src/brave-search) - Search the Brave search API | ||
- [Postgres](https://github.com/modelcontextprotocol/servers/tree/main/src/postgres) - Connect to your Postgres databases to query schema information and write optimized SQL | ||
- [Filesystem](https://github.com/modelcontextprotocol/servers/tree/main/src/filesystem) - Access files on your local machine | ||
- [Everything](https://github.com/modelcontextprotocol/servers/tree/main/src/everything) - A demo server showing MCP capabilities | ||
- [Google Drive](https://github.com/modelcontextprotocol/servers/tree/main/src/gdrive) - Search and access your Google Drive documents | ||
- [Google Maps](https://github.com/modelcontextprotocol/servers/tree/main/src/google-maps) - Get directions and information about places | ||
- [Memo](https://github.com/modelcontextprotocol/servers/tree/main/src/memo) - Access your Memo notes | ||
- [Git](https://github.com/modelcontextprotocol/servers/tree/main/src/git) - Get git history and commit information | ||
- [Puppeteer](https://github.com/modelcontextprotocol/servers/tree/main/src/puppeteer) - Control headless Chrome for web automation | ||
- [SQLite](https://github.com/modelcontextprotocol/servers/tree/main/src/sqlite) - Query SQLite databases | ||
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## Creating your own MCP server | ||
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See the [MCP docs](https://modelcontextprotocol.io) for how to create your own MCP servers. | ||
> Note: This provider is under active development. Additional documentation and features will be added once design decisions are finalized. |