claude-cost-cli

A CLI for querying Anthropic Admin API usage and cost data. Requires an Admin API key (sk-ant-admin...) from Claude Console → Settings → Admin Keys. Credentials are stored in macOS Keychain.

Installation

Requires Node.js >= 18 and macOS. The package is fully open source under the MIT license: https://github.com/cyberash-dev/claude-cost-cli

npm install -g claude-cost-cli

The npm package is published with provenance attestation, linking each release to its source commit via GitHub Actions. You can verify the published contents before installing:

npm pack claude-cost-cli --dry-run

Install from source (if you prefer to audit the code before running):

git clone https://github.com/cyberash-dev/claude-cost-cli.git
cd claude-cost-cli
npm install && npm run build && npm link

After installation the claude-cost command is available globally.

Quick Start

claude-cost config set-key     # Interactive prompt: enter Admin API key (masked)
claude-cost usage              # Token usage for the last 7 days
claude-cost cost               # Cost breakdown for the last 7 days
claude-cost cost --sum         # Total spend for the last 7 days

API Key Management

Store API key (interactive masked prompt, validates sk-ant-admin prefix):

claude-cost config set-key

Show stored key (masked):

claude-cost config show

Remove key from Keychain:

claude-cost config remove-key

Usage Reports

claude-cost usage                                    # Last 7 days, daily, grouped by model
claude-cost usage --period 30d                       # Last 30 days
claude-cost usage --from 2026-01-01 --to 2026-01-31 # Custom date range
claude-cost usage --model claude-sonnet-4            # Filter by model
claude-cost usage --api-keys apikey_01Rj,apikey_02Xz # Filter by API key IDs
claude-cost usage --group-by model,api_key_id        # Group by multiple dimensions
claude-cost usage --bucket 1h                        # Hourly granularity (1d, 1h, 1m)

JSON output (for scripting):

claude-cost usage --json
claude-cost usage --period 30d --json

Output columns: Date, Model, Input Tokens, Cached Tokens, Output Tokens, Web Searches.

Cost Reports

claude-cost cost                                           # Last 7 days, grouped by description
claude-cost cost --period 30d                              # Last 30 days
claude-cost cost --from 2026-01-01 --to 2026-01-31        # Custom date range
claude-cost cost --group-by workspace_id,description       # Group by workspace and description
claude-cost cost --sum                                     # Total cost only

JSON output (for scripting):

claude-cost cost --json
claude-cost cost --sum --json

Output columns: Date, Description, Model, Amount (USD), Token Type, Tier.

Flag Reference

usage

cost

Security and Data Storage

The following properties are by design and can be verified in the source code:

• Admin API key: stored exclusively in macOS Keychain (service: claude-cost-cli). By design, never written to disk in plaintext. See src/infrastructure/keychain-credential-store.ts for the implementation.
• No config files: all settings are passed via CLI flags. Nothing is stored on disk besides the Keychain entry.
• Network: by design, the API key is only sent to api.anthropic.com over HTTPS. No other outbound connections are made. See src/infrastructure/anthropic-usage-repository.ts and src/infrastructure/anthropic-cost-repository.ts.
• Scope: the Admin API key grants read-only access to organization usage and cost data. It cannot modify billing, create API keys, or access conversation content. This is a property of the Anthropic Admin API, not just this CLI.
• No caching: query results are not cached or persisted to disk. The CLI writes output to stdout only.

API Reference

This CLI wraps the Anthropic Admin API:

• Usage: GET /v1/organizations/usage_report/messages
• Cost: GET /v1/organizations/cost_report

Documentation: https://platform.claude.com/docs/en/build-with-claude/usage-cost-api