Set Up Providers and API Keys
Add a translation or LLM provider, choose a model when needed, and verify the connection before reading.
Choose the right provider
Open Options → API Providers and add a provider. Google Translate, Microsoft Translator, DeepL, and DeepLX are translation providers. LLM providers can translate and also power AI Smart Context, personalized prompts, subtitle AI segmentation, and Custom AI Actions. A model that supports structured output is required for Custom AI Actions and saving structured results to Notebase.
Read Frog's own Built-in AI needs no API key and runs on your plan's allowance. Without a paid plan it funds only Custom AI Actions, so on the free plan it is not a whole-page translation provider; see the built-in AI allowance.
Add and verify a connection
Choose a third-party provider from the preset list or an OpenAI-compatible custom endpoint, enter its API key and required connection options, select or fetch a model where the provider supports it, then enable the provider. Use Test Connection before assigning it to a feature. Keep API keys private and remove them before sharing an exported configuration.
Custom endpoints may need a Base URL, custom headers, or provider-specific options. Reasoning output can interfere with structured responses on some models; disable it when a provider offers that control and a Custom AI Action or translation response is malformed.
Next steps
Use the provider-specific guides for third-party providers, OpenAI-compatible endpoints, DeepL, DeepLX, Ollama, or LM Studio. Provider catalogs and model availability change frequently, so use the API Providers screen as the current source of truth.