Frequently Asked Questions

Common questions about APIs answered on APIHub.

What is an API Key? - Plain-language definition of an API key and how it is used.
What is OAuth? - Plain-language definition of OAuth 2.0 and when it is used.
What is a Webhook? - Plain-language definition of a webhook and how it differs from polling.
What is a REST API? - Plain-language definition of a REST API and its core principles.
What is GraphQL? - Plain-language definition of GraphQL and how it differs from REST.
What is a Rate Limit? - Plain-language definition of a rate limit and how to handle it.