by launchdarkly
Provides a Model Context Protocol (MCP) server that enables AI clients to interact with LaunchDarkly feature flags and AI configuration resources.
Enables AI‑enabled applications to query and manage LaunchDarkly feature flags and AI Configs via the MCP protocol.
mcp start
command.--server-url
(commercial, federal, EU).Q: Which runtimes are supported?
A: Refer to RUNTIMES.md
in the repository for the list of supported JavaScript runtimes.
Q: How do I run the server without Node.js? A: Download the appropriate standalone binary from the GitHub releases page and execute it directly.
Q: Can I connect to a non‑default LaunchDarkly environment?
A: Yes, pass --server-url https://app.launchdarkly.us
(or EU endpoint) when starting the server.
Q: Where do I place the API key?
A: Include it via the --api-key
flag or set the API_KEY
environment variable in your server configuration.
Q: Is the server generated code safe to modify? A: The SDK is generated programmatically; manual changes may be overwritten on the next generation.
The official Model Context Protocol (MCP) server for LaunchDarkly.
This MCP server can be installed in any AI client that supports the MCP protocol. Refer to your AI client's instructions if it isn't listed here.
Create a .cursor/mcp.json
file in your project root with the following content:
{
"mcpServers": {
"LaunchDarkly": {
"command": "npx",
"args": [
"-y", "--package", "@launchdarkly/mcp-server", "--", "mcp", "start",
"--api-key", "api-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
]
}
}
}
Specify your API key as found on LaunchDarkly's Authorization page.
Add the following server definition to your claude_desktop_config.json
file:
{
"mcpServers": {
"LaunchDarkly": {
"command": "npx",
"args": [
"-y", "--package", "@launchdarkly/mcp-server", "--", "mcp", "start",
"--api-key", "api-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
]
}
}
}
Specify your API key as found on LaunchDarkly's Authorization page.
Connect more tools
.+ Add new MCP
.{
"mcpServers": {
"LaunchDarkly": {
"command": "npx",
"args": [
"-y", "--package", "@launchdarkly/mcp-server", "--", "mcp", "start",
"--api-key", "api-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
]
}
}
}
Specify your API key as found on LaunchDarkly's Authorization page.
Save
.You can also run the MCP server as a standalone binary with no additional dependencies. You must pull these binaries from available GitHub releases while specifying the appropriate tag
value:
curl -L -o mcp-server https://github.com/launchdarkly/mcp-server/releases/download/{tag}/mcp-server-bun-darwin-arm64 && \
chmod +x mcp-server
You can also run the MCP server locally by cloning this repository. Once cloned, you'll need to install dependencies (npm install
) and build the server (npm run build
).
Then, configure your server definition to reference your local clone. For example:
{
"mcpServers": {
"launchdarkly": {
"command": "node",
"args": [
"/path/to/mcp-server/bin/mcp-server.js", "start",
"--api-key", "api-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
]
}
}
}
For supported JavaScript runtimes, please consult RUNTIMES.md.
Most customer accounts run on LaunchDarkly's commercial (default) environment. Customers on other environments can specify the --server-url
argument to connect to the appropriate environment. For example, customers on LaunchDarkly's Federal environment should specify the --server-url https://app.launchdarkly.us
argument when starting their MCP server.
Environment | Server URL |
---|---|
Commercial (Default) | https://app.launchdarkly.com |
Federal | https://app.launchdarkly.us |
EU | https://app.eu.launchdarkly.com |
While we value open-source contributions to this SDK, this library is generated programmatically. Any manual changes added to internal files will be overwritten on the next generation. We look forward to hearing your feedback. Feel free to open a PR or an issue with a proof of concept and we'll do our best to include it in a future release.
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{ "mcpServers": { "LaunchDarkly": { "command": "npx", "args": [ "-y", "--package", "@launchdarkly/mcp-server", "--", "mcp", "start" ], "env": { "API_KEY": "<YOUR_API_KEY>" } } } }
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