Developer platforms - official LaunchDarkly server
LaunchDarkly hosted MCP server
Hosted MCP server that lets AI clients manage LaunchDarkly feature flags, targeting, rollouts, segments, experiments and AgentControl configs, and query observability data such as logs, traces and error groups. Authenticates with OAuth. LaunchDarkly hosts it at https://mcp.launchdarkly.com/mcp/launchdarkly with OAuth auth.
Last verified 15 tools4 sources
Install
Claude Code
About Claude Codeclaude mcp add --transport http "launchdarkly" \
"https://mcp.launchdarkly.com/mcp/launchdarkly"Codex
About Codexcodex mcp add "launchdarkly" --url "https://mcp.launchdarkly.com/mcp/launchdarkly"Cursor
About Cursor{
"mcpServers": {
"launchdarkly": {
"url": "https://mcp.launchdarkly.com/mcp/launchdarkly",
"headers": {}
}
}
}Generic
{
"mcpServers": {
"launchdarkly": {
"type": "http",
"url": "https://mcp.launchdarkly.com/mcp/launchdarkly"
}
}
}Tools
list-flags- Search and browse feature flags in a project, scoped to a single environment.
get-flag- Get detailed configuration for a single feature flag in a specific environment.
create-flag- Create a new feature flag in a project; it starts OFF in all environments.
toggle-flag- Turn a feature flag's targeting on or off in a specific environment.
update-targeting-rules- Add, remove, or modify custom targeting rules for a flag in an environment.
update-rollout- Change a flag's default rule (fallthrough), including percentage rollouts.
archive-flag- Archive a feature flag (reversible soft-delete).
find-stale-flags- Find feature flags that are candidates for cleanup, sorted by staleness.
check-removal-readiness- Safety check before removing a flag; returns a safe, caution or not-ready verdict.
list-projects- List LaunchDarkly projects in the account.
list-segments- List segments in a project environment.
list-agentcontrol-configs- Search and browse AgentControl Configs in a project.
create-agentcontrol-config- Create a new AgentControl Config in a project.
query-logs- Query project logs.
query-error-groups- Query project error groups.
As documented on October 17, 2026. A running server reports its current list through tools/list.
Notes and caveats
- Not available in LaunchDarkly federal or EU instances; those use the local MCP server.
- The server page lists 170 tools, including query-traces and search-docs; several factory-* tools are deprecated in favor of release-autopilot-* tools.
- The account you authorize needs create, read, update and delete permission on flags and AgentControl configs (Writer base role or the LaunchDarkly Developer preset role recommended).
- The generic snippet is the documented replacement config for migrating from the older npx-based local server.
- VS Code is documented only as an install-page deeplink.
- There is no public source repo for the hosted server; the docs point to launchdarkly/mcp-server for issues.
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Related reading
- What's New in Mastra (Late 2026): Harness, AgentController GA, Eval Gates and MCP 2.xMastra in late 2026: goals, schedules, signals, AgentController GA, eval gates and MCP 2.x, with type-checked TypeScript examples and honest tradeoffs.
- MCP vs A2A vs Function Calling: Which Layer Does What in 2026MCP vs A2A vs function calling compared on the 2026-07-28 MCP spec and A2A 1.0: what each protocol does, where they overlap, and how to stack them.
- Pydantic AI V2 in Late 2026: Capabilities, Graphs, Evals and MCPPydantic AI V2 explained through v2.57.0: capabilities, typed output, Conversation storage, caching, graphs, evals, MCP Apps and Logfire, with checked code.
- Reverse Engineer Anything (REA): What the MCP Server Does and Where the Line IsREA (Reverse Engineer Anything) is an MIT-licensed MCP server that lets Claude Code, Codex or Cursor inspect binaries, Electron apps and APKs. How to try it.
- Claude Opus 5.5 Built a Browser 3D World: The Higgsfield MCP WorkflowClaude Opus 5.5 and Higgsfield MCP built an interactive 3D Library of Alexandria in the browser. The verified connector setup and where the workflow holds up.
- Pi 1.0 Release Guide: MCP, Codemode and Pi DurablePi 1.0 adds built-in MCP through Codemode, a fullscreen TUI by default and Pi Durable. What changed, how to install it, and what breaks on upgrade.
FAQ
What does the LaunchDarkly hosted MCP server do?
Hosted MCP server that lets AI clients manage LaunchDarkly feature flags, targeting, rollouts, segments, experiments and AgentControl configs, and query observability data such as logs, traces and error groups. Authenticates with OAuth. The vendor documents 15 tools, including list-flags, get-flag, create-flag and toggle-flag.
How do I add the LaunchDarkly hosted MCP server to Claude Code?
LaunchDarkly documents a Claude Code config; copy it from the Claude Code section of this page. Snippets for Codex, Cursor and Generic are there too.
Does the LaunchDarkly hosted MCP server need authentication?
Yes, OAuth. Transport: Streamable HTTP. Status: Unlabelled, last checked October 17, 2026.
Sources
Last verified against 4 LaunchDarkly pages, then re-checked independently.
- launchdarkly.comhttps://launchdarkly.com/docs/home/getting-started/mcp
- launchdarkly.comhttps://launchdarkly.com/docs/home/getting-started/mcp-hosted.md
- mcp.launchdarkly.comhttps://mcp.launchdarkly.com/mcp/launchdarkly
- mcp.launchdarkly.comhttps://mcp.launchdarkly.com/mcp/launchdarkly/install
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