developer-tools

OpenFeature MCP Server

by open-feature

OpenFeature MCP Server — install OpenFeature SDKs, evaluate feature flags remotely via OFREP, and connect AI clients to

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What it does

Integrates OpenFeature functionality into AI coding assistants, providing SDK installation guidance and feature flag evaluation capabilities. Connects AI assistants to any OFREP-compatible feature flag service.

About

OpenFeature MCP Server is an official MCP server published by open-feature that provides AI assistants with tools and capabilities via the Model Context Protocol. OpenFeature MCP Server — install OpenFeature SDKs, evaluate feature flags remotely via OFREP, and connect AI clients to It is categorized under developer tools.

How to install

You can install OpenFeature MCP Server 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

Apache-2.0

OpenFeature MCP Server is released under the Apache-2.0 license. This is a permissive open-source license, meaning you can freely use, modify, and distribute the software.

Readme

Frequently Asked Questions

What is the OpenFeature MCP Server MCP server?: OpenFeature MCP Server is a Model Context Protocol (MCP) server profile on explainx.ai. MCP lets AI hosts (e.g. Claude Desktop, Cursor) call tools and resources through a standard interface; this page summarizes categories, install hints, and community ratings.
How do MCP servers relate to agent skills?: Skills are reusable instruction packages (often SKILL.md); MCP servers expose live capabilities. Teams frequently combine both—skills for workflows, MCP for APIs and data. See explainx.ai/skills and explainx.ai/mcp-servers for parallel directories.
How are reviews shown for OpenFeature MCP Server?: This profile displays 32 aggregated ratings (sample rows for discoverability plus signed-in user reviews). Average score is about 4.6 out of 5—verify behavior in your own environment before production use.

Use Cases

Extended AI Capabilities

Add new capabilities to Claude beyond text generation

Example

Access external data sources, execute code, interact with tools and services

✓

Transform Claude from chatbot to action-taking agent

Context Enhancement

Provide Claude with access to relevant context and data

Example

Load project documentation, access knowledge bases, query databases

✓

Get more accurate, context-aware responses

Workflow Automation

Automate multi-step workflows combining AI and external tools

Example

Research → Summarize → Create document → Send notification

✓

Complete complex tasks end-to-end without manual steps

Discussion

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MCP server reviews

Ratings

4.6★★★★★32 reviews

★★★★★Diego Menon· Dec 20, 2024
We evaluated OpenFeature MCP Server against two servers with overlapping tools; this profile had the clearer scope statement.
★★★★★Shikha Mishra· Dec 8, 2024
According to our notes, OpenFeature MCP Server benefits from clear Model Context Protocol framing — fewer ambiguous “AI plugin” claims.
★★★★★Ganesh Mohane· Dec 4, 2024
We evaluated OpenFeature MCP Server against two servers with overlapping tools; this profile had the clearer scope statement.
★★★★★Yash Thakker· Nov 27, 2024
We wired OpenFeature MCP Server into a staging workspace; the listing’s GitHub and npm pointers saved time versus hunting across READMEs.
★★★★★Dhruvi Jain· Oct 18, 2024
OpenFeature MCP Server is a well-scoped MCP server in the explainx.ai directory — install snippets and categories matched our Claude Code setup.
★★★★★Ava Torres· Sep 25, 2024
OpenFeature MCP Server reduced integration guesswork — categories and install configs on the listing matched the upstream repo.
★★★★★Ava Iyer· Sep 17, 2024
Useful MCP listing: OpenFeature MCP Server is the kind of server we cite when onboarding engineers to host + tool permissions.
★★★★★Diego Patel· Aug 16, 2024
Useful MCP listing: OpenFeature MCP Server is the kind of server we cite when onboarding engineers to host + tool permissions.
★★★★★William Flores· Aug 8, 2024
OpenFeature MCP Server reduced integration guesswork — categories and install configs on the listing matched the upstream repo.
★★★★★Ren Agarwal· Jul 27, 2024
I recommend OpenFeature MCP Server for teams standardizing on MCP; the explainx.ai page compares cleanly with sibling servers.

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OpenFeature MCP

📦 Install in Cursor

📦 Install in VS Code

", "OPENFEATURE_OFREP_API_KEY": "" } } } } ``` ### Claude Code Add the server via the Claude Code CLI: ```bash claude mcp add --transport stdio openfeature npx -y @openfeature/mcp ``` Then manage the connection with `/mcp` in the CLI. ### Windsurf In the `Manage MCP servers` raw config, add: ```json { "mcpServers": { "OpenFeature": { "command": "npx", "args": ["-y", "@openfeature/mcp"] } } } ``` ### Codex CLI Edit `~/.codex/config.toml`: ```toml [mcp_servers.openfeature] command = "npx" args = ["-y", "@openfeature/mcp"] ``` Restart Codex CLI after saving. ### Gemini CLI Edit `~/.gemini/settings.json`: ```json { "mcpServers": { "OpenFeature": { "command": "npx", "args": ["-y", "@openfeature/mcp"] } } } ``` Restart Gemini CLI after saving. ### Claude Desktop Edit your Claude Desktop config at: - **macOS**: `~/Library/Application Support/Claude/claude_desktop_config.json` - **Windows**: `%APPDATA%\Claude\claude_desktop_config.json` Add the following configuration: ```json { "mcpServers": { "openfeature": { "command": "npx", "args": ["-y", "@openfeature/mcp"] } } } ``` Restart Claude Desktop after saving. ## Available Tools The OpenFeature MCP Server provides two main tools accessible to AI assistants: ### SDK Installation Guide: `install_openfeature_sdk` Fetches installation instructions for OpenFeature SDKs in various languages and frameworks. Optionally includes provider-specific setup documentation. #### SDK Tool Parameters | Parameter | Type | Required | Description | |-----------|------|----------|-------------| | `technology` | string | Yes | Target language/framework (see supported list below) | | `providers` | string[] | No | Provider identifiers to include installation instructions | #### Supported Technologies The technologies list is built from the available `prompts/*.md`, updated automatically using `scripts/build-prompts.js` | Technology | SDK | |------------|-----| | `android` | Android Kotlin SDK | | `dotnet` | .NET SDK | | `go` | Go SDK | | `ios` | iOS Swift SDK | | `java` | Java SDK | | `javascript` | JavaScript Web SDK | | `nestjs` | NestJS SDK | | `nodejs` | Node.js SDK | | `php` | PHP SDK | | `python` | Python SDK | | `react` | React SDK | | `ruby` | Ruby SDK | #### Supported Providers The provider list is automatically sourced from the OpenFeature ecosystem (`open-feature/openfeature.dev` repo). See `scripts/build-providers.js` for details on how the provider list is maintained. ### OFREP Flag Evaluation: `ofrep_flag_eval` Evaluate feature flags using the OpenFeature Remote Evaluation Protocol (OFREP). Supports both single flag and bulk evaluation. #### OFREP Tool Parameters | Parameter | Type | Required | Description | |-----------|------|----------|-------------| | `base_url` | string | No | Base URL of your OFREP-compatible flag service | | `flag_key` | string | No | Flag key for single evaluation (omit for bulk) | | `context` | object | No | Evaluation context (e.g., `{ targetingKey: "user-123" }`) | | `etag` | string | No | ETag for bulk evaluation caching | | `auth` | object | No | Authentication configuration | | `auth.bearer_token` | string | No | Bearer token for authorization | | `auth.api_key` | string | No | API key for authorization | #### OFREP Configuration To use OFREP flag evaluation features, configure authentication and endpoint details. The server checks configuration in this priority order: 1. **Environment Variables** - `OPENFEATURE_OFREP_BASE_URL` or `OFREP_BASE_URL` - `OPENFEATURE_OFREP_BEARER_TOKEN` or `OFREP_BEARER_TOKEN` - `OPENFEATURE_OFREP_API_KEY` or `OFREP_API_KEY` 2. **Configuration File**: `~/.openfeature-mcp.json` Example `~/.openfeature-mcp.json`: ```json { "OFREP": { "baseUrl": "https://flags.example.com", "bearerToken": "", "apiKey": "" } } ``` You can override the config file path using the `OPENFEATURE_MCP_CONFIG_PATH` environment variable. > **Note**: All logs are written to stderr. The MCP protocol messages use stdout. ## MCP Usage Examples ### SDK Installation Example > "install the OpenFeature SDK for Node.js with the flagd provider" The AI will use the MCP to fetch relevant installation instructions and attempt to install the OpenFeature SDK with the correct provider. ### Flag Evaluation Example When interacting with your AI assistant: > "Can you check the value of the 'new-checkout-flow' feature flag for 'user-123'?" The AI will use the MCP to evaluate the flag using OFREP and provide you with the result, along with additional metadata like variant and reason. ## Resources - **NPM Package**: [@openfeature/mcp](https://www.npmjs.com/package/@openfeature/mcp) - **MCP Registry**: [dev.openfeature/mcp](https://registry.modelcontextprotocol.io) - **OpenFeature Documentation**: [openfeature.dev](https://openfeature.dev) - **CNCF Slack**: Join [#openfeature](https://cloud-native.slack.com/archives/C0344AANLA1) ## Get Involved The OpenFeature MCP Server is an open-source project maintained by the OpenFeature community. We welcome contributions: - **Report Issues**: [GitHub Issues](https://github.com/open-feature/mcp/issues) - **Contribute Code**: [Contributing Guide](https://github.com/open-feature/mcp/blob/main/CONTRIBUTING.md) - **Suggest Features**: Share ideas in the CNCF Slack [#openfeature](https://cloud-native.slack.com/archives/C0344AANLA1) channel - **Improve Documentation**: Help us improve SDK installation guides and examples Join the [CNCF Slack](https://communityinviter.com/apps/cloud-native/cncf) to get involved.

OpenFeature MCP Server

What it does

About

How to install

License

Readme

Frequently Asked Questions

Use Cases

Extended AI Capabilities

Context Enhancement

Workflow Automation

Discussion

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Capabilities

OpenFeature MCP

Implementation Guide

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Technical Details

When to Use This

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