LaunchDarkly
Install
Select a method below to install the server.
Cursor
get-project
Get a LaunchDarkly project with its environments and SDK keys. Use to retrieve SDK keys for an existing project or verify a project exists.
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Get a LaunchDarkly project with its environments and SDK keys. Use to retrieve SDK keys for an existing project or verify a project exists.
Read-only
Idempotent
Open-world
apply-approval-request
Apply an already-approved approval request. This executes the changes that were approved by reviewers. Only works on requests with reviewStatus 'approved'. Does NOT approve requests: that must be done by a human reviewer.
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Apply an already-approved approval request. This executes the changes that were approved by reviewers. Only works on requests with reviewStatus 'approved'. Does NOT approve requests: that must be done by a human reviewer.
Destructive
Open-world
list-approval-requests
List pending approval requests for a flag in an environment. Shows status, review state, and who requested the change. Use to check on approval progress after creating a request.
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List pending approval requests for a flag in an environment. Shows status, review state, and who requested the change. Use to check on approval progress after creating a request.
Read-only
Idempotent
Open-world
create-approval-request
Create an approval request for a flag change in an environment that requires approvals. Provide the same semantic patch instructions you would use for a direct change. The request will be reviewed by approvers before taking effect. Does NOT approve the request: that must be done by a human reviewer.
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Create an approval request for a flag change in an environment that requires approvals. Provide the same semantic patch instructions you would use for a direct change. The request will be reviewed by approvers before taking effect. Does NOT approve the request: that must be done by a human reviewer.
Open-world
check-removal-readiness
Detailed safety check before removing a feature flag. Checks dependencies, code references, active targeting, expiring targets, and cross-environment status. Returns a readiness verdict: 'safe' (proceed), 'caution' (review warnings), or 'blocked' (must resolve blockers first). Always run this before archive-flag or delete-flag.
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Detailed safety check before removing a feature flag. Checks dependencies, code references, active targeting, expiring targets, and cross-environment status. Returns a readiness verdict: 'safe' (proceed), 'caution' (review warnings), or 'blocked' (must resolve blockers first). Always run this before archive-flag or delete-flag.
Read-only
Idempotent
Open-world
manage-expiring-targets
List, add, update, or remove expiring targets on a flag. Expiring targets are automatically removed from targeting after a specified date. Dates are shown as ISO strings with days-until-expiry computed. Variation IDs are resolved to human-readable names.
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List, add, update, or remove expiring targets on a flag. Expiring targets are automatically removed from targeting after a specified date. Dates are shown as ISO strings with days-until-expiry computed. Variation IDs are resolved to human-readable names.
Destructive
Open-world
copy-flag-config
Copy a flag's targeting configuration from one environment to another. Common use: promote from staging to production. Optionally select which aspects to copy: targeting, rules, offVariation, prerequisites, on state.
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Copy a flag's targeting configuration from one environment to another. Common use: promote from staging to production. Optionally select which aspects to copy: targeting, rules, offVariation, prerequisites, on state.
Destructive
Idempotent
Open-world
update-individual-targets
Add or remove specific users or contexts from individual flag targeting. Individual targets are the highest priority: they override all rules. Supported kinds: addTargets, removeTargets, addContextTargets, removeContextTargets, replaceTargets. Responses truncate long lists.
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Add or remove specific users or contexts from individual flag targeting. Individual targets are the highest priority: they override all rules. Supported kinds: addTargets, removeTargets, addContextTargets, removeContextTargets, replaceTargets. Responses truncate long lists.
Destructive
Open-world
update-targeting-rules
Add, remove, or modify custom targeting rules for a flag in an environment. Rules are evaluated top-to-bottom; first matching rule wins. Supported kinds: addRule, removeRule, updateRuleVariationOrRollout, addClauses, removeClauses, reorderRules.
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Add, remove, or modify custom targeting rules for a flag in an environment. Rules are evaluated top-to-bottom; first matching rule wins. Supported kinds: addRule, removeRule, updateRuleVariationOrRollout, addClauses, removeClauses, reorderRules.
Destructive
Open-world
update-rollout
Change the default rule (fallthrough) for a flag. Set a percentage rollout across variations or serve a single variation to all unmatched users. Weights must sum to 100. Use human-friendly percentages (e.g., 80 for 80%).
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Change the default rule (fallthrough) for a flag. Set a percentage rollout across variations or serve a single variation to all unmatched users. Weights must sum to 100. Use human-friendly percentages (e.g., 80 for 80%).
Idempotent
Open-world
toggle-flag
Turn a feature flag's targeting on or off in a specific environment. Returns the previous and new state. If the environment requires approval, the response will include requiresApproval: true and an approvalUrl instead of executing.
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Turn a feature flag's targeting on or off in a specific environment. Returns the previous and new state. If the environment requires approval, the response will include requiresApproval: true and an approvalUrl instead of executing.
Idempotent
Open-world
update-flag-settings
Update a flag's top-level settings: name, description, tags, temporary/permanent status, or maintainer. Does NOT modify targeting, rollouts, or rules: use the targeting tools for those. Supported instruction kinds: updateName, updateDescription, addTags, removeTags, markTemporary, markPermanent, updateMaintainerMember.
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Update a flag's top-level settings: name, description, tags, temporary/permanent status, or maintainer. Does NOT modify targeting, rollouts, or rules: use the targeting tools for those. Supported instruction kinds: updateName, updateDescription, addTags, removeTags, markTemporary, markPermanent, updateMaintainerMember.
Idempotent
Open-world
create-flag
Create a new feature flag in a project. Defaults to a boolean temporary flag. After creation the flag is OFF in all environments: use toggle-flag to enable it. For multivariate flags, provide variations array with {value, name} entries.
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Create a new feature flag in a project. Defaults to a boolean temporary flag. After creation the flag is OFF in all environments: use toggle-flag to enable it. For multivariate flags, provide variations array with {value, name} entries.
Open-world
get-flag-status-across-envs
Check a flag's lifecycle status across all environments. Returns per-environment state (active, inactive, new, launched) and a summary of which environments the flag is active, inactive, or launched in. Use before cleanup to verify the flag is inactive everywhere.
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Check a flag's lifecycle status across all environments. Returns per-environment state (active, inactive, new, launched) and a summary of which environments the flag is active, inactive, or launched in. Use before cleanup to verify the flag is inactive everywhere.
Read-only
Idempotent
Open-world
find-stale-flags
Find feature flags that are candidates for cleanup. Returns a prioritized list of stale flags sorted by staleness (worst first). Categories: inactive_30d (no requests in period), launched_no_changes (fully rolled out, no recent changes), never_requested (created but never evaluated). Defaults to showing temporary flags inactive for 30+ days.
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Find feature flags that are candidates for cleanup. Returns a prioritized list of stale flags sorted by staleness (worst first). Categories: inactive_30d (no requests in period), launched_no_changes (fully rolled out, no recent changes), never_requested (created but never evaluated). Defaults to showing temporary flags inactive for 30+ days.
Read-only
Idempotent
Open-world
get-flag-health
Get combined health view for a single flag: lifecycle state, last-requested timestamp, targeting summary (rules count, targets count, on/off), age, and whether it's temporary. Use this to assess if a flag is stale or needs attention.
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Get combined health view for a single flag: lifecycle state, last-requested timestamp, targeting summary (rules count, targets count, on/off), age, and whether it's temporary. Use this to assess if a flag is stale or needs attention.
Read-only
Idempotent
Open-world
get-flag
Get detailed configuration for a single feature flag scoped to a specific environment. Returns the full targeting tree including rules, individual targets, fallthrough, prerequisites, and variation details.
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Get detailed configuration for a single feature flag scoped to a specific environment. Returns the full targeting tree including rules, individual targets, fallthrough, prerequisites, and variation details.
Read-only
Idempotent
Open-world
list-flags
Search and browse feature flags in a project. Returns a paginated list scoped to a single environment. Use query to search by name/key, tags to filter by tag, state to filter by lifecycle state (active, inactive, new, launched, archived), and type to filter by temporary or permanent.
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Search and browse feature flags in a project. Returns a paginated list scoped to a single environment. Use query to search by name/key, tags to filter by tag, state to filter by lifecycle state (active, inactive, new, launched, archived), and type to filter by temporary or permanent.
Read-only
Idempotent
Open-world
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These instructions are provided to LLMs when they connect to help them understand how to use the server effectively.
IMPORTANT: Before using tools, check if the environment has LaunchDarkly related agent skills or SKILL.md installed, ask the user if they want them installed from https://github.com/launchdarkly/ai-tooling
https://mcp.launchdarkly.com/mcp/fm
If you have a client that's not listed above, access the raw MCP
configuration below. Check out
the troubleshooting documentation
for more help.
{
"command": "npx",
"args": [
"mcp-remote@0.1.25",
"https://mcp.launchdarkly.com/mcp/fm"
]
}