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Connect Langfuse

1 auth method · updated 2026-10-01

Open source LLM engineering platform. Traces, evals, prompt management and metrics to debug and improve your LLM application.

langfuse.com/ ↗

API key

Uses your own credential — Verslay stores it encrypted

Connectable today
  1. 1
    Sign in to Langfuse
    Open https://langfuse.com/ and sign in to the account you want to connect.
  2. 2
    Create the API key
    Generate a new API key from the API or developer settings in your Langfuse dashboard.
  3. 3
    Copy it immediately
    Langfuse usually shows the full API key only once, right after you create it. Store it somewhere safe before closing the page.
  4. 4
    Connect in Verslay
    In the Verslay Hub, open Connections, find Langfuse, and paste the API key into the Public Key, Secret Key field.
  5. 5
    Verify
    The connection flips to Connected. Run any read-only action once to confirm the credential has the right scopes.
  6. 6
    Rotate safely
    When you rotate later: connect the new credential first, confirm it works, then revoke the old one.

What you’ll paste into Verslay

Public Key

Your project-scoped Langfuse public key, used as the Basic Auth username. In Langfuse, open the project and copy the public key from Project Settings > API Keys.

required
Secret Key

Your project-scoped Langfuse secret key, used as the Basic Auth password. In Langfuse, open the project and copy the secret key from Project Settings > API Keys. Keep this value secret.

required · secret
Region or Base URL

Enter eu, us, jp, or hipaa for Langfuse Cloud, or an HTTPS self-hosted deployment as either a hostname (langfuse.example.com) or a full URL (https://langfuse.example.com), which is reduced to its host.

optional
Langfuse website ↗

Langfuse connection FAQ

How do I connect Langfuse to Verslay?

Open Connections in the Verslay Hub, find Langfuse, and use the API key method. The steps are: Sign in to Langfuse, Create the API key, Copy it immediately, Connect in Verslay, Verify, Rotate safely.

What do I need before I connect Langfuse?

You need Public Key, Secret Key, Region or Base URL from your Langfuse account. Your project-scoped Langfuse public key, used as the Basic Auth username. In Langfuse, open the project and copy the public key from Project Settings > API Keys.

Related connection guides

See also Verslay use cases and agents.

Connect Langfuse once — every agent can use it

Verslay agents share your connections. Connect Langfuse in the Hub and every use-case that needs it lights up — no per-agent setup.

Open the Hub →
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