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Working with Headers

LangDB API provides robust support for HTTP headers, enabling developers to manage API requests efficiently with enhanced tracing, observability, and organization.

These headers play a crucial role in structuring interactions with multiple LLMs by providing tracing, request tracking, and session continuity, making it easier to monitor, and analyze API usage

Thread ID (x-thread-id)​

Usage: Groups multiple related requests under the same conversation

  • Useful for tracking interactions over a single user session.
  • Helps maintain context across multiple messages.

Thread Title (x-thread-title)​

Usage: Assigns a custom, human-readable title to a thread.

  • This title is displayed in the LangDB UI, making it easier to identify and search for specific conversations.

Public Thread (x-thread-public)​

Usage: Makes a thread publicly accessible via a shareable link.

  • Set the value to 1 or true to enable public sharing.
  • The public URL will be: https://app.langdb.ai/sharing/threads/{thread_id}
  • The x-thread-title, if set, will be displayed on the public thread page.

Check Threads for more details.

Run ID (x-run-id)​

Usage: Tracks a unique workflow execution in LangDB, such as a model call or tool invocation.

  • Enables precise tracking and debugging.
  • Each Run is independent for better observability.

Check Run for more details.

Label (x-label)​

Usage: Adds a custom tag or label to a LLM Model Call for easier categorization.

  • Helps with tracing multiple agents.

Check Label for more details.

Project ID (x-project-id)​

Usage: Identifies the project under which the request is being made.

  • Helps in cost tracking, monitoring, and organizing API calls within a specific project.
  • Can be set in headers or directly in the API base URL https://api.us-east-1.langdb.ai/${langdbProjectId}/v1