Api
- How I build mock API responses that look real enough for frontend work
Mock responses help frontend and integration work move before the real backend endpoint is finished. The API Mock Response Builder tool gives me a safe place to test the idea before I put it into a script, server, or …
- How I check a JWT when an API login looks broken
A JWT is one of those strings that looks scary the first time you see it. It often appears in a login response, browser storage, or an API request header:
- How I compare two JSON responses without being distracted by formatting
A JSON diff should compare meaning, not indentation. Two JSON documents can look different as text but still contain the same data. The JSON Diff tool is useful because it lets me check the result in a small, controlled …
- How I convert a curl command into code I can actually use
API documentation often gives examples as curl commands: curl -X POST https://api.example.com/users \ -H "Authorization: Bearer TOKEN" \ -H "Content-Type: application/json" \ -d …
- How I create and check HMAC signatures for API requests
HMAC proves that a message was created by someone who knows the shared secret, and that the signed message has not changed. The HMAC Generator tool gives me a safe place to test the idea before I put it into a script, …
- How I debug CORS without guessing
CORS errors are frustrating because the browser often shows a scary message, but the real cause is usually a small missing header. You may see something like this in the browser console:
- How I format JSON before debugging it
JSON is easier to debug when it is valid and formatted. A formatter turns one long line into a structure humans can read. The JSON Formatter tool gives me a safe place to test the idea before I put it into a script, …
- How I look up HTTP status codes during debugging
HTTP status codes are short signals from a server. They tell me whether a request succeeded, redirected, failed on the client side, or failed on the server side. The HTTP Status Codes tool helps me inspect the input and …
- How I read a curl command before I run it
A curl command is an HTTP request written for the terminal. Before running one from documentation or chat, I want to know what it will send. The curl Tester tool gives me a safe place to test the idea before I put it …
- How I read an OpenAPI file before using an API
An OpenAPI file is machine-readable API documentation. It describes endpoints, inputs, outputs, and authentication expectations. The OpenAPI Viewer tool gives me a safe place to test the idea before I put it into a …