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New Trace

Triggers when a new trace is created in Langfuse. Polls the traces list ordered by newest first.

• 2 parameter s
• Trace Name Filter
• Environment Filter

New Score

Triggers when a new score is created in Langfuse. Useful for reacting to quality evaluations.

• 1 parameter s
• Score Name Filter

Ingest Trace

Creates a new trace in Langfuse. A trace represents a single request or operation in your LLM application.

• 12 parameter s
• Trace Name
• Trace ID
• User ID
• Session ID
• Input
• Output
• Metadata
• Tags
• Environment
• Version
• Release
• Make Public

Log Generation

Logs an LLM generation (model call) as an observation within a trace. Captures model, tokens, cost, and input/output.

• 17 parameter s
• Generation Name
• Generation ID
• Trace ID
• Model
• Input
• Output
• Prompt Tokens
• Completion Tokens
• Total Tokens
• Start Time
• End Time
• Metadata
• Environment
• Version
• Level
• Prompt Name
• Prompt Version

Create Score

Creates a score (quality signal) for a trace or observation. Use to record evaluation results, user feedback, or automated quality metrics.

• 8 parameter s
• Score Name
• Score Value
• Trace ID
• Session ID
• Observation ID
• Data Type
• Comment
• Environment

Create Prompt

Creates a new version of a prompt template in Langfuse. If the prompt name already exists, a new version is added. Supports both text and chat prompt formats.

• 5 parameter s
• Prompt Name
• Prompt Type
• Labels
• Tags
• Commit Message

Get Trace

Retrieves a trace by its ID, including all associated observations.

• 1 parameter s
• Trace ID

List Traces

Retrieves a paginated list of traces with optional filters.

• 9 parameter s
• Trace Name
• User ID
• Session ID
• Environment
• From Timestamp
• To Timestamp
• Tags
• Version
• Release

Make HTTP Request

Make an HTTP request to any URL with full control over method, headers, and body.