Bring Feature Flags
to LangChain
Learn how to connect ConfigCat to LangChain and start using 18 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 ConfigCat MCP Server?
Connect ConfigCat to any AI agent to streamline your feature flag management and release workflows through natural conversation.
What you can do
- Configurations & Environments — List, create, and manage configuration containers and environments (Test, Staging, Production) across your products.
- Feature Flags & Settings — Create and inspect feature flags or settings (boolean, string, int, double) to control application logic.
- Value Management — Retrieve and update setting values dynamically to trigger real-time changes in your software without redeploying.
- Segment Control — Manage user segments to target specific groups for canary releases or A/B testing.
How it works
- Subscribe to this server
- Enter your ConfigCat API Key ID and Secret
- Start managing your feature toggles from Claude, Cursor, or any MCP-compatible client
Who is this for?
- Developers — toggle features and check flag statuses directly from the code editor to maintain focus.
- DevOps Engineers — manage environments and configurations as part of the CI/CD workflow via automated agents.
- Product Managers — oversee feature rollouts and user segments through simple chat commands without technical overhead.
Built-in capabilities (18)
Create a new configuration
Create a new environment
Create a new segment
Create a new feature flag or setting
Delete a configuration
Delete an environment
Delete a segment
Delete a setting
Get details of a specific configuration
Get details of an environment
Get details of a segment
Get details of a setting
Get the value of a setting in an environment
List all configurations in a product
g., Test, Production) for a specific product. List all environments in a product
List all segments in a product
List all settings in a configuration
Update the value/targeting of a setting
Why LangChain?
LangChain's ecosystem of 500+ components combines seamlessly with ConfigCat through native MCP adapters. Connect 18 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 ConfigCat 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 ConfigCat queries for multi-turn workflows
ConfigCat in LangChain
ConfigCat and 4,000+ other MCP servers. One platform. One governance layer.
Teams that connect ConfigCat 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 ConfigCat in LangChain
The ConfigCat 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 18 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
ConfigCat for LangChain
Every tool call from LangChain to the ConfigCat 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 configuration?
Yes. Use the list_settings tool with your Configuration ID to retrieve all feature flags and settings, including their types and keys.
How do I create a new environment like 'Staging'?
Simply use the create_environment tool. Provide the Product ID and the name 'Staging' to instantly set up a new environment for your flags.
Is it possible to update the value of a setting remotely?
Yes! The update_setting_value tool allows you to change the value of any flag or setting for a specific environment in real-time.
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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