> For the complete documentation index, see [llms.txt](https://docs.feedspring.com/introduction/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.feedspring.com/introduction/graphql-api.md).

# GraphQL API

- [Overview](https://docs.feedspring.com/introduction/graphql-api/overview.md): Fetch any FeedSpring feed as structured data with GraphQL, and render it in any website, app or backend.
- [Quickstart](https://docs.feedspring.com/introduction/graphql-api/quickstart.md): Send your first GraphQL query and get a FeedSpring feed back as JSON.
- [Querying Feeds](https://docs.feedspring.com/introduction/graphql-api/querying-feeds.md): How the feed query works: feed types, inline fragments, collections under nodes, nullability and item limits.
- [Images](https://docs.feedspring.com/introduction/graphql-api/images.md): Request resized, reformatted and responsive images from any FeedSpring image field.
- [Access & Security](https://docs.feedspring.com/introduction/graphql-api/access-and-security.md): How FeedSpring Feed IDs work as public keys, and how to restrict a feed to your own domains.
- [Errors](https://docs.feedspring.com/introduction/graphql-api/errors.md): The GraphQL error format and every FeedSpring error code.
- [Limits & Caching](https://docs.feedspring.com/introduction/graphql-api/limits-and-caching.md): Request size and complexity limits, plan view allowances, and how to cache feed responses.
- [Schema Reference](https://docs.feedspring.com/introduction/graphql-api/schema-reference.md): Discover the FeedSpring GraphQL schema through introspection or download it as an SDL file.