Bring Feature Flags
to LangChain
Learn how to connect Flipt to LangChain and start using 9 AI agent tools in minutes. Fully managed, enterprise secure, and ready to use without writing a single line of code.
GDPR Free for SubscribersCompatible with every major AI agent and IDE
Gemini
What is the Flipt MCP Server?
Connect your Flipt instance to any AI agent to orchestrate feature management and progressive delivery through natural conversation.
What you can do
- Flag Management — List and inspect feature flags across different namespaces to understand your current feature states
- Targeting & Segments — Retrieve segments and create constraints to define specific user subsets for targeted rollouts
- Rollout Control — List rules and rollouts, and create distributions to manage percentage-based releases and canary deployments
- Variants — Create and manage flag variants to return different values based on evaluation logic
- Auth & Infrastructure — List authentication tokens and namespaces to understand your environment's structure and access levels
How it works
- Subscribe to this server
- Enter your Flipt URL and API Token
- Start managing your feature flags from Claude, Cursor, or any MCP-compatible client
Who is this for?
- DevOps Engineers — quickly audit rollout configurations and namespace partitions without leaving the terminal or IDE
- Product Managers — check the status of feature flags and segments to verify release progress
- Developers — create variants and constraints directly while coding to speed up feature implementation
Built-in capabilities (9)
Create a constraint for a segment
Create a distribution for a rule
Create a new variant for a flag
List flags in a namespace
List all namespaces
List rollouts for a flag
List rules for a flag
List segments in a namespace
List authentication tokens
Why LangChain?
LangChain's ecosystem of 500+ components combines seamlessly with Flipt through native MCP adapters. Connect 9 tools via Vinkius and use ReAct agents, Plan-and-Execute strategies, or custom agent architectures. with LangSmith tracing giving full visibility into every tool call, latency, and token cost.
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The largest ecosystem of integrations, chains, and agents. combine Flipt MCP tools with 500+ LangChain components
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Agent architecture supports ReAct, Plan-and-Execute, and custom strategies with full MCP tool access at every step
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LangSmith tracing gives you complete visibility into tool calls, latencies, and token usage for production debugging
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Memory and conversation persistence let agents maintain context across Flipt queries for multi-turn workflows
Flipt in LangChain
Flipt and 4,000+ other MCP servers. One platform. One governance layer.
Teams that connect Flipt to LangChain through Vinkius don't need to source, host, or maintain individual MCP servers. Every tool call runs inside a hardened runtime with credential isolation, DLP, and a signed audit chain.
Raw MCP | Vinkius | |
|---|---|---|
| Server catalog | Find and host yourself | 4,000+ managed |
| Infrastructure | Self-hosted | Sandboxed V8 isolates |
| Credential handling | Plaintext in config | Vault + runtime injection |
| Data loss prevention | None | Configurable DLP policies |
| Kill switch | None | Global instant shutdown |
| Financial circuit breakers | None | Per-server limits + alerts |
| Audit trail | None | Ed25519 signed logs |
| SIEM log streaming | None | Splunk, Datadog, Webhook |
| Honeytokens | None | Canary alerts on leak |
| Custom domains | Not applicable | DNS challenge verified |
| GDPR compliance | Manual effort | Automated purge + export |
Why teams choose Vinkius for Flipt in LangChain
The Flipt MCP Server runs on Vinkius-managed infrastructure inside AWS — a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts. All 9 tools execute in hardened sandboxes optimized for native MCP execution.
Your AI agents in LangChain only access the data you authorize, with DLP that blocks sensitive information from ever reaching the model, kill switch for instant shutdown, and up to 60% token savings. Enterprise-grade infrastructure, zero maintenance.
* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure
How Vinkius secures
Flipt for LangChain
Every tool call from LangChain to the Flipt MCP Server is protected by DLP redaction, cryptographic audit chains, V8 sandbox isolation, kill switch, and financial circuit breakers.
Frequently asked questions
Can I list all feature flags in a specific namespace?
Yes! Use the list_flags tool and provide the namespaceKey (e.g., 'default'). The agent will return all flags configured within that partition.
How do I define a new variant for an existing flag?
You can use the create_variant action. You'll need to specify the namespaceKey, flagKey, and the new variant's key and name.
Is it possible to see the rollout configuration for a specific flag?
Absolutely. Use the list_rollouts tool by providing the target namespaceKey and flagKey to retrieve the current rollout strategy.
How does LangChain connect to MCP servers?
Use langchain-mcp-adapters to create an MCP client. LangChain discovers all tools and wraps them as native LangChain tools compatible with any agent type.
Which LangChain agent types work with MCP?
All agent types including ReAct, OpenAI Functions, and custom agents work with MCP tools. The tools appear as standard LangChain tools after the adapter wraps them.
Can I trace MCP tool calls in LangSmith?
Yes. All MCP tool invocations appear as traced steps in LangSmith, showing input parameters, response payloads, latency, and token usage.
MultiServerMCPClient not found
Install: pip install langchain-mcp-adapters
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