I don't have enough information to provide a direct answer. However, I can suggest some possible options for finding an episode guide API:

1. Official APIs: Check the official websites of streaming services like Netflix, Hulu, Amazon Prime Video, or Disney+ to see if they offer an API for accessing their episode guides.
2. Third-party APIs: Look for third-party APIs that provide access to episode guides for various TV shows and movies. Some examples include The Movie Database (TMDb) API, IMDB API, or OpenTV API.
3. Open Data Platforms: Explore open data platforms like Kaggle, Quandl, or Data.gov, which may offer datasets related to TV shows and movies that can be used to create an episode guide API.

If you have more specific information about the type of episode guide API you're looking for (e.g., a particular streaming service), I'd be happy to try and help further.