How to Use the Flagsmith MCP in Mastra AI

Automate your release workflows in Mastra AI by connecting Flagsmith for conditional logic and environment control.

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Connect Flagsmith MCP to Mastra AI

Create your Vinkius account to connect Flagsmith to Mastra AI and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Flagsmith with Mastra AI

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Automated environment provisioning

Deploy new testing environments by invoking `create_environment` within a workflow step. This lets you spin up isolated flag containers for every branch or feature build. Once the environment exists, you can manage its flags programmatically. This removes manual setup from your deployment pipeline.

Conditional flag branching

Use `get_environment_flags` to check current states before your workflow decides which path to take. If a flag is disabled, your agent can trigger a fallback routine. This makes your Mastra AI agents smart enough to avoid executing code for features that are currently toggled off in production.

Segment override cleanup

Execute `delete_segment_override` to clear out temporary test settings once a QA run finishes. This keeps your configuration clean and prevents stale overrides. Your workflows can trigger this as a final step in a cleanup task. It prevents configuration debt from accumulating over time.

Setup guide

Set up Flagsmith MCP in Mastra AI

Prerequisites

Node.js 18+ and a TypeScript project
@mastra/mcp + @mastra/core packages
Active Vinkius subscription with a valid endpoint token

1

Install dependencies
Run npm install @mastra/mcp @mastra/core plus your preferred model provider (e.g. @ai-sdk/openai).
2

Configure the MCPClient
Create an MCPClient with your Vinkius endpoint as a URL object. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Discover and inject tools
Call mcpClient.listTools() and spread the result into your agent's tools object. All Flagsmith tools become native Mastra tools.
4

Run with any model
Swap openai("gpt-4o") for any AI SDK-compatible provider. Call agent.generate() and the agent routes tool calls through MCP automatically.

agent.ts

import { MCPClient } from "@mastra/mcp";
import { Agent } from "@mastra/core/agent";
import { openai } from "@ai-sdk/openai";

const mcpClient = new MCPClient({
  id: "flagsmith-mcp-client",
  servers: {
    "flagsmith-mcp": {
      url: new URL(
        "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
      ),
    },
  },
});

const agent = new Agent({
  name: "Flagsmith Agent",
  model: openai("gpt-4o"),
  instructions: "You have access to Flagsmith tools.",
  tools: {
    ...(await mcpClient.listTools()),
  },
});

const result = await agent.generate(
  "List recent Flagsmith transactions"
);
console.log(result.text);

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Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Flagsmith. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

Why Choose Vinkius

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Common questions about Flagsmith MCP in Mastra AI

You register the server in your MCP client configuration. Once added, you spread the tools into the agent definition to grant it control over your flags.

Yes. Since Mastra AI has a built-in workflow engine, you can define retry logic that triggers if a call to `update_flag_v2` hits a network timeout.

You can use the requireToolApproval setting. This forces the agent to pause and ask for your permission before it executes any changes to your production flags.

You pass the environment key as an environment variable to your agent. The server uses this to authenticate every request made to your project.

Only the specific flag configurations and identity traits are transmitted during execution. The server operates in an ephemeral memory space and does not cache your project keys.

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