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An embedding is a list of numbers that represents the meaning of a piece of text, so that similar texts get similar numbers.

luv13's endpoints are the two URL paths under https://api.luv13.ai/v1 that it serves, one to list models and one to create chat completions.

An environment variable is a named value set outside your code, such as an API key, that your program reads when it runs.

Errors and status codes are the HTTP codes and bodies luv13 returns when a request can't be served, and what each one means you should do.

Estimating costs means turning luv13 token counts into dollars with one multiplication, because every model has the same flat rate and input costs the same as output.