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Glassray connects to Langfuse as a pull integration: you provide read credentials and a project, and Glassray fetches new traces on a sync cadence. It’s one of four trace integrations - the others are LangSmith, PostHog, and OpenTelemetry.

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Connect

Open Sources

In the dashboard, go to Settings → Sources and add Langfuse.

Enter your keys

Provide your Langfuse public key and secret key. If you’re self-hosted or on a non-default region, also set your host URL. Where do I find my Langfuse keys?

Pick a project

Choose the Langfuse project to pull traces from.

Glassray verifies and syncs

Glassray verifies the credentials and starts pulling new traces on a cadence.
Your Langfuse credentials are stored in WorkOS Vault, never in Glassray’s database. The connected source row only holds a reference to the vaulted secret.

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Filtering

A source can carry an optional filter so only the runs you care about are pulled - narrow by trace name and scope. Filtering is applied at ingest, and changes are go-forward (re-sync to apply a new filter). See Traces.
Prefer to push instead of pull? Use OpenTelemetry. Once traces land, head to Flows or Ask Glassray.