feat: add datadog cost management support and fix startup callback issue

[Harshit28j]

Relevant issues

Fixes startup crash when datadog_cost_management callback is configured in config.yaml

Pre-Submission checklist

Please complete all items before asking a LiteLLM maintainer to review your PR

• I have Added testing in the tests/litellm/ directory, Adding at least 1 test is a hard requirement - see details
• My PR passes all unit tests on make test-unit
• My PR's scope is as isolated as possible, it only solves 1 specific problem

CI (LiteLLM team)

CI status guideline:

• 50-55 passing tests: main is stable with minor issues.
• 45-49 passing tests: acceptable but needs attention
• <= 40 passing tests: unstable; be careful with your merges and assess the risk.

• Branch creation CI run
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• CI run for the last commit
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• Merge / cherry-pick CI run
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Type

🆕 New Feature
🐛 Bug Fix

Changes

New Feature: Datadog Cloud Cost Management Integration

Added support for sending aggregated LLM cost data to Datadog Cloud Cost Management in FOCUS format.

Key Features:

• Aggregates costs by Provider, Model, Date, and Tags
• Batched uploads to Datadog Custom Costs API
• Configurable via callbacks: ["datadog_cost_management"]
• Requires DD_API_KEY and DD_APP_KEY environment variables

Files Added:

• litellm/integrations/datadog/datadog_cost_management.py - Core implementation
• litellm/types/integrations/datadog_cost_management.py - Type definitions
• tests/test_litellm/integrations/datadog/test_datadog_cost_management.py - Unit tests (4 tests, all passing)

Files Modified:

• litellm/proxy/common_utils/callback_utils.py - Added proper instantiation for datadog_cost_management
• litellm/integrations/callback_configs.json - Added UI configuration
• docs/my-website/docs/observability/datadog.md - Added documentation

Testing:

• All 4 unit tests pass
• Manual verification: proxy starts successfully and processes requests
• Cost aggregation and batching verified in logs

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Project	Deployment	Review	Updated (UTC)
litellm	Error		Jan 22, 2026 7:08pm