[Feature]: Add header support for spend_logs_metadata #14008
Description
The Feature
Currently, spend_logs_metadata can only be provided in the request body under litellm_metadata. Some clients would like to supply this metadata via headers (similar to how x-litellm-tags works).
Motivation, pitch
Use Case / Motivation:
• Easier to inject spend metadata at the infra/gateway level without mutating request bodies.
• Standardizes header-based tagging and metadata handling.
• Aligns with how x-litellm-tags is already supported.
Proposed Behavior:
Header:
x-litellm-spend-logs-metadata: {"owner":"team-data-ai-ml","feature":"a-feature","product":"personal","environment":"development"}
Expected Result:
• spend_logs_metadata is available in spend logs exactly as if it had been passed in the body.
• This allows consistent spend attribution without requiring body mutation.
LiteLLM is hiring a founding backend engineer, are you interested in joining us and shipping to all our users?
Yes
Twitter / LinkedIn details
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