“API testing”

Tests what the browser Geolocation API reveals when permission is granted.

Runs automated checks on REST and SOAP web service responses.

Public HTTP request and response service for testing clients, with endpoints for headers, status codes and delays.

Hosted test API with users and auth responses for front-end demos and request practice.

An open-source API client for building and testing REST and GraphQL requests, usable in the browser.

Creates a fake REST or SOAP API endpoint with custom responses.

Sends HTTP requests to a JSON API and shows the response.

API and page that return random placeholder user profiles with names, photos and addresses.

Probes browser APIs to expose fingerprinting signals and detect spoofing or privacy tools.

Online webhook tester that receives and inspects requests from services like Shopify and Slack.

Free fake REST API with posts, comments, todos and users supporting all HTTP methods.

Provides sample JSON endpoints you can call for placeholder data.

Creates a mock API endpoint and records the requests sent to it.

Spins up a mock REST, SOAP or GraphQL endpoint with rules and generated responses, and logs incoming requests.

Public fake REST API serving placeholder products, users, carts and posts for prototypes and tests.

Sends prompts with different structures to OpenAI and shows how many tokens were served from cache.