What is JSON? Syntax, data types and common mistakes explained
JSON explained in plain language: syntax, the six data types, why APIs use it, the mistakes that break it, and how to read and validate JSON quickly.
Read the guide →Software
<p>Apps, operating systems and the ideas that make them useful.</p>
API rate limits explained: why you get 429 and how to avoid it
How API rate limits work, what 429 Too Many Requests and Retry-After mean, common limiting algorithms, and how to build clients that stay within limits.
Read the guide →What is a webhook? How webhooks work, with examples and security tips
A webhook is an HTTP callback that notifies your app when an event happens. How webhooks differ from polling, how to verify signatures and handle retries.
Read the guide →What are API services? Types, examples and how they work
API services explained: payments, maps, messaging, data, cloud and AI APIs, how integration works, pricing, and how to choose a reliable provider.
Read the guide →REST API methods: GET, POST, PUT, PATCH and DELETE explained
What each REST API method does, with request examples, status codes, PUT vs PATCH, and which requests are safe to retry.
Read the guide →What is API access? API keys vs OAuth tokens explained
API access means proving who is calling and what they may do. How API keys and OAuth tokens work, when to use each, and how to keep them…
Read the guide →What is a REST API? Methods, status codes and examples
A REST API gives every piece of data its own URL and uses HTTP methods like GET and POST to read and change it. Requests, status codes, principles…
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Why software needs permissions
Every time an app asks to use your camera, read your contacts or see your location, you are looking at a permission system at work.
Read the guide →Why file formats matter
A file format describes how information is arranged inside a file.
Read the guide →What is an API? How API access works, with examples
An API is an agreed way for one program to request data or an action from another. It defines endpoints, inputs, outputs, authentication and error behaviour.
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