Usage and Cost API

The Usage & Cost Admin API provides programmatic and granular access to historical API usage and cost data for your organization. This data is similar to the information available in the Usage and Cost pages of the Claude Console.

This API enables you to better monitor, analyze, and optimize your Claude implementations:

• Accurate Usage Tracking: Get precise token counts and usage patterns instead of relying solely on response token counting
• Cost Reconciliation: Match internal records with Anthropic billing for finance and accounting teams
• Product performance and improvement: Monitor product performance while measuring if changes to the system have improved it, or setup alerting
• Rate limit and Priority Tier optimization: Optimize features like prompt caching or specific prompts to make the most of one’s allocated capacity, or purchase dedicated capacity.
• Advanced Analysis: Perform deeper data analysis than what's available in Console

Partner solutions

Leading observability platforms offer ready-to-use integrations for monitoring your Claude API usage and cost, without writing custom code. These integrations provide dashboards, alerting, and analytics to help you manage your API usage effectively.

Quick start

Get your organization's daily usage for the last 7 days:

curl "https://api.anthropic.com/v1/organizations/usage_report/messages?\
starting_at=2025-01-08T00:00:00Z&\
ending_at=2025-01-15T00:00:00Z&\
bucket_width=1d" \
  --header "anthropic-version: 2023-06-01" \
  --header "x-api-key: $ADMIN_API_KEY"

User-Agent: YourApp/1.0.0 (https://yourapp.com)

Usage API

Track token consumption across your organization with detailed breakdowns by model, workspace, and service tier with the /v1/organizations/usage_report/messages endpoint.

Key concepts

• Time buckets: Aggregate usage data in fixed intervals (1m, 1h, or 1d)
• Token tracking: Measure uncached input, cached input, cache creation, and output tokens
• Filtering & grouping: Filter by API key, workspace, model, service tier, or context window, and group results by these dimensions
• Server tool usage: Track usage of server-side tools like web search

For complete parameter details and response schemas, see the Usage API reference.

Basic examples

Daily usage by model

curl "https://api.anthropic.com/v1/organizations/usage_report/messages?\
starting_at=2025-01-01T00:00:00Z&\
ending_at=2025-01-08T00:00:00Z&\
group_by[]=model&\
bucket_width=1d" \
  --header "anthropic-version: 2023-06-01" \
  --header "x-api-key: $ADMIN_API_KEY"

Hourly usage with filtering

curl "https://api.anthropic.com/v1/organizations/usage_report/messages?\
starting_at=2025-01-15T00:00:00Z&\
ending_at=2025-01-15T23:59:59Z&\
models[]=claude-sonnet-4-5-20250929&\
service_tiers[]=batch&\
context_window[]=0-200k&\
bucket_width=1h" \
  --header "anthropic-version: 2023-06-01" \
  --header "x-api-key: $ADMIN_API_KEY"

Filter usage by API keys and workspaces

curl "https://api.anthropic.com/v1/organizations/usage_report/messages?\
starting_at=2025-01-01T00:00:00Z&\
ending_at=2025-01-08T00:00:00Z&\
api_key_ids[]=apikey_01Rj2N8SVvo6BePZj99NhmiT&\
api_key_ids[]=apikey_01ABC123DEF456GHI789JKL&\
workspace_ids[]=wrkspc_01JwQvzr7rXLA5AGx3HKfFUJ&\
workspace_ids[]=wrkspc_01XYZ789ABC123DEF456MNO&\
bucket_width=1d" \
  --header "anthropic-version: 2023-06-01" \
  --header "x-api-key: $ADMIN_API_KEY"

Time granularity limits

Cost API

Retrieve service-level cost breakdowns in USD with the /v1/organizations/cost_report endpoint.

Key concepts

• Currency: All costs in USD, reported as decimal strings in lowest units (cents)
• Cost types: Track token usage, web search, and code execution costs
• Grouping: Group costs by workspace or description for detailed breakdowns
• Time buckets: Daily granularity only (1d)

For complete parameter details and response schemas, see the Cost API reference.

Basic example

curl "https://api.anthropic.com/v1/organizations/cost_report?\
starting_at=2025-01-01T00:00:00Z&\
ending_at=2025-01-31T00:00:00Z&\
group_by[]=workspace_id&\
group_by[]=description" \
  --header "anthropic-version: 2023-06-01" \
  --header "x-api-key: $ADMIN_API_KEY"

Pagination

Both endpoints support pagination for large datasets:

1. Make your initial request
2. If has_more is true, use the next_page value in your next request
3. Continue until has_more is false

# First request
curl "https://api.anthropic.com/v1/organizations/usage_report/messages?\
starting_at=2025-01-01T00:00:00Z&\
ending_at=2025-01-31T00:00:00Z&\
limit=7" \
  --header "anthropic-version: 2023-06-01" \
  --header "x-api-key: $ADMIN_API_KEY"

# Response includes: "has_more": true, "next_page": "page_xyz..."

# Next request with pagination
curl "https://api.anthropic.com/v1/organizations/usage_report/messages?\
starting_at=2025-01-01T00:00:00Z&\
ending_at=2025-01-31T00:00:00Z&\
limit=7&\
page=page_xyz..." \
  --header "anthropic-version: 2023-06-01" \
  --header "x-api-key: $ADMIN_API_KEY"

Common use cases

Explore detailed implementations in anthropic-cookbook:

• Daily usage reports: Track token consumption trends
• Cost attribution: Allocate expenses by workspace for chargebacks
• Cache efficiency: Measure and optimize prompt caching
• Budget monitoring: Set up alerts for spending thresholds
• CSV export: Generate reports for finance teams

Frequently asked questions

How fresh is the data?

Usage and cost data typically appears within 5 minutes of API request completion, though delays may occasionally be longer.

What's the recommended polling frequency?

The API supports polling once per minute for sustained use. For short bursts (e.g., downloading paginated data), more frequent polling is acceptable. Cache results for dashboards that need frequent updates.

How do I track code execution usage?

Code execution costs appear in the cost endpoint grouped under Code Execution Usage in the description field. Code execution is not included in the usage endpoint.

How do I track Priority Tier usage?

Filter or group by service_tier in the usage endpoint and look for the priority value. Priority Tier costs are not available in the cost endpoint.

What happens with Workbench usage?

API usage from the Workbench is not associated with an API key, so api_key_id will be null even when grouping by that dimension.

How is the default workspace represented?

Usage and costs attributed to the default workspace have a null value for workspace_id.

How do I get per-user cost breakdowns for Claude Code?

Use the Claude Code Analytics API, which provides per-user estimated costs and productivity metrics without the performance limitations of breaking down costs by many API keys. For general API usage with many keys, use the Usage API to track token consumption as a cost proxy.

See also

The Usage and Cost APIs can be used to help you deliver a better experience for your users, help you manage costs, and preserve your rate limit. Learn more about some of these other features:

• Admin API overview
• Admin API reference
• Pricing
• Prompt caching - Optimize costs with caching
• Batch processing - 50% discount on batch requests
• Rate limits - Understand usage tiers