Claudech API documentation

Claudech gives you a family of fast, capable language models behind a single API that speaks the two formats your tools already understand, with transparent per-token billing and no surprise invoices.

What you get#

One key, every model. POST /v1/chat/completions (OpenAI format) and POST /v1/messages (Anthropic format) both work with every Claudech model, with streaming, tool calling, JSON output and reasoning controls.
Drop-in compatibility. Use the OpenAI or Anthropic SDKs, Cursor, Claude Code, Continue, Open WebUI and any other tool that lets you set a base URL and an sk- key. See SDKs & libraries and Integrations.
Predictable billing. Requests are paid for in Claudech tokens, a prepaid balance you top up with a subscription or one-off token packages. Every response tells you exactly what it cost. See Tokens & billing.
Pay your way. Sign up with an email address and pay with PayPal, a credit or debit card, or crypto (BTC, ETH, USDT, USDC and more). Crypto needs no identity checks, there is no minimum commitment, and purchased tokens never expire.
Usage visibility. Query your own usage, request history and balance over the API, or browse them in the dashboard.

How a request flows#

Text

your app ──▶ https://api.claudech.com/v1/chat/completions
              │  1. authenticate the API key and check plan limits
              │  2. reserve tokens from your balance
              │  3. route to the model (with automatic fallback if needed)
              │  4. stream the response back to you
              └▶ 5. meter the real usage and settle the reservation

Requests that fail before the model produces output are never billed. If a model is temporarily unavailable, Claudech can transparently route to a fallback model of equal or greater capability; when it does, the response says so (fallback_used).

Base URL#

Use the host that matches your client’s wire format (same API key for both):

Format	Base URL	Used by
OpenAI Chat Completions	`https://api.claudech.com/v1`	OpenAI SDK, Cursor, LangChain, curl to `/v1/chat/completions`
Anthropic Messages	`https://api.claudech.com`	Anthropic SDK, Claude Code (`ANTHROPIC_BASE_URL`), curl to `/v1/messages`

Anthropic clients append /v1/messages themselves — do not set Claude Code to /v1/chat/completions. Requests must use HTTPS; plain HTTP is rejected. Step-by-step tool setup: integrations.

Models at a glance#

Model	Best for	Context	Reasoning
`claude-opus-5-5`	Everyday chat, coding and analysis	1M	Yes
`claude-fable-5-1`	Complex multi-step work where quality matters most	1M	Yes
`claude-opus-5`	Mathematics, research synthesis, hard debugging	1M	Extended
`claude-opus-5-5`	High-volume classification, extraction and summaries	1M	No

Details, capabilities and current prices are on the Models page and are always available from GET /v1/models.

Next steps#

Create an account and generate an API key.
Follow the Quickstart to make your first request.
Read Streaming and Tool calling when you are ready to build.

Try it in the browser first

The Playground lets you experiment with prompts and parameters, then copies out the equivalent curl, JavaScript or Python code.