Flagsmith MCP server

What the model can do

Flagsmith (SaaS or self-hosted): projects, environments, feature flags with their on/off state per environment, segments, tags, and the audit log of who changed what; can turn a flag on or off or set its value in one environment, override it for a segment, create, edit, archive or delete flags, and create segments and tags.

Reads

• flagsmith_projectsFlagsmith projects the key can see: id, name and organisation id.
• flagsmith_environmentsEnvironments of one Flagsmith project (e.g. Development, Production): id, name, description.
• flagsmith_featuresFeature flags in one Flagsmith project: id, name, type, description, tags (ids), when created and last changed…
• flagsmith_segmentsSegments in one Flagsmith project: id, name, description, how many rules, whether it overrides any flag, when created and updated.
• flagsmith_tagsTags defined in one Flagsmith project: id, label, description.
• flagsmith_audit_logThe change history of one Flagsmith project: who changed which flag, segment or environment, and when, as Flagsmith's audit log writes it…

Acts, when you ask

These change something in Flagsmith. The model is told to use them only when you ask for exactly that, and each one is granted by name: per team on a shared connection, by the owner on a personal one.

• flagsmith_toggle_flagTurn a feature flag on or off in one Flagsmith environment.
• flagsmith_set_flag_valueSet a feature flag's value (remote config) in one Flagsmith environment, and optionally turn it on or off at the same time.
• flagsmith_create_segment_overrideOverride a feature flag for one segment in one Flagsmith environment: users matching the segment get this on/off state (and value…
• flagsmith_create_featureCreate a feature flag in a Flagsmith project.
• flagsmith_update_featureChange a Flagsmith flag's description, tags or server-key-only setting, or archive it (archived true, hidden from lists…
• flagsmith_delete_featurePermanently delete a feature flag from a Flagsmith project and every environment, with its overrides.
• flagsmith_create_segmentCreate a segment in a Flagsmith project: users matching its rules (trait conditions such as plan EQUAL pro, or a percentage split).
• flagsmith_create_tagCreate a tag in a Flagsmith project, to label flags with (attach it with flagsmith_update_feature).

Connect it

First connect Flagsmith on Dashboard → Connections, then add Memtro to your client once. The Flagsmith tools appear alongside the tools of everything else you have connected; nothing is configured per connector.

claude plugin marketplace add memtro-org/claude-memtro
claude plugin install memtro@memtro --config api_key=sk-memtro-...

{
  "mcpServers": {
    "memtro": {
      "url": "https://platform.memtro.com/api/mcp",
      "headers": {
        "Authorization": "Bearer sk-memtro-..."
      }
    }
  }
}

{
  "mcp": {
    "memtro": {
      "type": "remote",
      "url": "https://platform.memtro.com/api/mcp",
      "headers": {
        "Authorization": "Bearer sk-memtro-..."
      }
    }
  }
}

Who may use it

The key identifies the person, and the server offers that person the tools they may use everywhere else in Memtro. A shared Flagsmith connection is used by the teams an administrator granted it to, tool by tool, on the Permissions page; a personal connection is used by its owner alone, and its tools that act stay off until the owner allows them. See Teams and permissions and Connectors.

Ask it like this

• › Is new_checkout on in Production?
• › Who changed flags in the Web project this week?
• › Which flags in the Web project are archived?
• › Which segments override a flag?
• › Turn new_checkout off in Production.

Questions

Is this an official Flagsmith MCP server?

No. It is Memtro's MCP server with Memtro's Flagsmith connector behind it: the connector reads Flagsmith through its API with the credentials you connect on Dashboard → Connections, and Flagsmith publishes nothing here. The same endpoint carries every other system you connect and Memtro's memory tools.

What does it cost?

Nothing on top of Memtro. One price per organisation by its number of users, from $50 a month for up to 10 users after a 7-day free trial, with every connector, the MCP server, jobs and memory included. You bring your own model keys.

Can it change anything in Flagsmith?

Only when you ask, and only what it has been granted: turn a flag on or off in one environment; set a flag's value (and optionally its on/off state) in one environment; override a flag for a segment in one environment; create a feature flag in a project; change a flag's description or tags, or archive or unarchive it; delete a feature flag from every environment, permanently; create a segment of users defined by rules; create a tag for flags. Every other tool reads, searches or lists. An administrator grants each acting tool by name per team, and a personal connection acts only after its owner allows it.

Which clients work?

Any MCP client that speaks Streamable HTTP: Claude Code, Cursor, Claude Desktop, OpenCode, Codex, Zed, Windsurf, Cline and the Anthropic and OpenAI SDKs. There is no local process to run; the server is remote and authenticated with your key.

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