We provide an Anthropic Messages compatible /v1/messages, so anthropic-native tools work as-is.
export ANTHROPIC_BASE_URL=https://api.everyais.com export ANTHROPIC_API_KEY=everyais_your_api_key
Do not include /v1 in the base URL — the SDK appends /v1/messages itself.
Claude Code calls POST /v1/messages/count_tokens before a request.
This call is not billed and does not go out to the upstream provider.