LangChain

Use Constructor with LangChain

Set up in seconds, once. From then on, your agent gets things done for you: add one adapter call, and Constructor is live in LangChain.

Ask AI about this guide

Constructor Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_7QdndEEXMElkrXV72k1k9X9VY0HS8rfUr6VIhrH5/mcp

Connecting Constructor to LangChain

About a minute, in your code

  1. 1Install LangChain with the mcp extra: pip install "langchain[mcp]".
  2. 2Create an MCPAdapter with your Constructor link: MCPAdapter("<your link>"). The link above is the URL.
  3. 3Call list_tools and pass the tools to your agent. Constructor is now part of your LangChain agent.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "constructor-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_7QdndEEXMElkrXV72k1k9X9VY0HS8rfUr6VIhrH5/mcp"
    }
  }
}

LangChain + Constructor

One agent. Your Constructor, live inside LangChain.

Real prompts, answered with live data. This is the kind of session your agent will run once the adapter is in.

Waiting for input…

Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

ChatGPTClaudeCursorPerplexityGeminiMicrosoft CopilotRaycastMeta AI

These prompts ship with the Constructor Connector. Once yours is connected, your agent can run them.

The full capability set, the prompts and the observed latency live on the Constructor Connector page.

Mission Control

See everything your LangChain agents do in Constructor.

When your LangChain agent runs a tool in Constructor, it happens inside your code: you see the output, but not the request itself, what data it carried, or whether a rule was broken.

Now every move lands on your screen.

Every execution is recorded, enforced, and shown to you: what ran, what it returned, what was blocked, and why.

AI Briefing
Upgrade to unlock

Know exactly what needs your attention before you even look at the charts. One briefing. The full picture. The next move.

Requests
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API 88ms · Overhead 54ms
Vinkius Reliability
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Agent 280 · Upstream 47 · Vinkius 15
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AI tokens processed
DLP Protected
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Cost Saved
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AI Agents Activities

last 30 days
30d agotoday

Request Volume & Latency

requests latency

Every request your LangChain agents make through Constructor is logged, enforced and auditable. See how AI Governance turns agent activity into accountability, and what it means for your Constructor workflows.

What sets us apart

It's not just the Connector that stays safe. Everything your agents do through it is.

Connecting Constructor to your AI is step one. But an open line between your agents and Constructor is only half the story: without protection, every action they take runs unguarded.

That's why protection doesn't stop at the door.

Every action your agents take through the Connector runs inside our infrastructure: signed activity logs, automatic key rotation, spending limits that pause instead of surprise, and a sandbox that isolates every execution.

01

Tamper Proof Activity Log

Every request your agents make in Constructor is recorded and signed, so any change to the history becomes detectable.

02

Automatic Key Rotation

We rotate security keys every 24 hours. Your Constructor connection stays protected without any manual work.

03

Spending Protection

We enforce the spending limit you choose and pause actions that exceed it until approval is received. Your Constructor actions never surprise you.

04

Isolated Sandbox

Every execution through Constructor runs isolated, with 34+ security rules covering memory, CPU, network access, file handling and execution.

05

Security Event Streaming

Security events flow to Splunk, Datadog or your own webhook, so Constructor activity lands in the tools you already rely on.

06

Instant Resume

Idle connections resume in 3 to 5 ms while preserving their state, keeping your LangChain sessions responsive.

07

Malicious File Protection

We detect compressed files designed to exhaust system resources and block them before they ever reach Constructor.

08

Credential Validation

We test your Constructor credentials before saving them. Invalid credentials are rejected instead of being stored.

09

Separate Usage Limits

Usage stays isolated per account, so activity in one connection never consumes another account's allowance.

One Connector, one link, and the whole operation is protected. Not just the connection: everything your agents do through it.

These guarantees are not add-ons: they are the infrastructure every Constructor connection runs on. Read how our infrastructure protects everything your LangChain agents do, end to end.

Inside Vinkius

Get Constructor ready for your AI. It's easy.

You choose Constructor from the Vinkius Catalog, sign in to your Constructor account, and get one connection link. That's it.

  1. You choose Constructor

    You find Constructor in the Catalog and install the Connector with one click.

    Constructor

    Active

    Enable Connector
    Activating…

  2. You sign in

    You connect your Constructor account and choose what you want your AI to access. Your credentials stay encrypted and separate from your AI.

    Configure Credentials

    Configure credentials for {{connectorName}}

    RequiredEncrypted
    Save & Continue

    Encrypted Storage

    Your credentials are encrypted at rest and in transit.

    Never Shared

    Your credentials are never shared with third parties.

    Full Control

    Revoke or update credentials at any time.

  3. You add the link in your code

    Vinkius gives you one connection link. In your agent, you create an MCPAdapter with the link as the server URL, and the tools are ready.

    Token generated successfully

    MCP Connection URL

    https://edge.vinkius.com/vk_preview_7QdndEEXMElkrXV72k1k9X9VY0HS8rfUr6VIhrH5/mcp

    Connection Token

    vk_live_••••••••
    Go to Dashboard

Set it up once. Use Constructor with the AI you already use.

FAQ

LangChain access questions.

  • 01

    Which LangChain version supports this?

    LangChain 1.4.0 or newer with the mcp extra (pip install langchain[mcp]). The MCPAdapter lives in the langchain.mcp namespace and is currently in beta.

  • 02

    If I connect Constructor to my LangChain agent, can I use the same connection in Claude or ChatGPT later?

    Yes, and that's the point: the connection is yours, not LangChain's. You paste the same link in any AI you use, and there's nothing new to set up or pay again. Connect a new AI and Constructor is already there.

  • 03

    Do I need to hand my Constructor password to my agent?

    Never. You sign in once at Vinkius, and we keep your logins encrypted and away from your AI. Your code only ever sees the link, and you can remove it whenever you want.

  • 04

    What can my agent actually do with Constructor?

    Whatever the Connector covers: check data, run actions and bring answers back. The Connector page lists every capability your AI gains, with real examples you can copy.

  • 05

    The tools don't show up. What do I check?

    Confirm the URL matches your link exactly and that the Connector is active in your Vinkius account, then call list_tools again. A deactivated Connector stops responding.

  • 06

    Can I remove the access later?

    Anytime. Remove the MCPAdapter call from your code and the tools leave your agent. Your Vinkius account keeps the connection and its history either way, ready for the next AI.

  • More questions about Constructor? The Connector page answers them. See everything the Constructor Connector can do

About the Connector

What Constructor adds to your AI.

Once you connect it, your AI gains 10 capabilities: the exact actions it can take in Constructor when you ask. The Connector page lists every one of them in detail, alongside the latency we measure in production and prompts worth trying first.

See everything the Constructor Connector can do