Use the Anthropic-compatible base URL with a Tokenless API key:
Tokenless supports Anthropic’s Messages and Models routes, preserving the
compatible request and response formats while routing behind profiles such as
tokenless-pro.
Use an Anthropic client
Use Claude Code with tkl
With the Tokenless CLI installed, sign in once and launch Claude Code through the
Anthropic-compatible route. No API key setup is required.
For the full upstream specification, see the Claude Messages API
reference. Use these pages
for the Tokenless-compatible routes and routing behavior.