DummyJSON vs Mockaroo

DummyJSON is a free hosted REST API that supplies fake JSON data for frontend development, building, and testing without backend setup. Its listed resources include products, carts, users, posts, comments, quotes, todos, recipes, images, and authentication. Requests can use limit, skip, and select parameters; a limit of zero returns all items. A delay parameter simulates responses from 0 to 5000 milliseconds. Developers can create a hosted mock endpoint with their own JSON response and select GET, POST, PUT, PATCH, or DELETE. These endpoints last 90 days and accept response bodies up to 300 KB. The webhook inspector captures incoming requests for debugging and supports all HTTP methods; endpoints remain live for 24 hours, store up to 100 requests, and accept payloads up to 300 KB. Authorization, cookie, and x-api-key headers are removed before storage. Additional tools include a TOTP generator for base32 secrets and otpauth URIs, plus authentication examples for login, access and refresh tokens, and authenticated resource access. Product changes simulate requests but do not alter stored server data.

Mockaroo is a web-based synthetic data generator for developers and testers who need realistic test records or a mock back end while building a user interface. It offers more than 100 built-in data types; users can also upload reference data or define types with the formula API. The Generate API produces JSON, CSV, tab-separated or custom-delimited text, SQL, and XML. Mock APIs can connect request parameters to schemas and return dynamic or static data, or simulate errors. Both APIs require an API key, sent as a query parameter or an X-API-Key header. Free includes 1,000 rows per file and 200 API requests per day. Silver is $60 a year and allows 100,000 rows per file and 1 million API records per day; Gold is $500 a year and allows 10 million rows per file and 10 million API records per day. Synchronous API responses are limited to 5,000 records on every plan; background generation requires a paid plan. Enterprise is $7,500 a year, with unlimited data and users and Docker deployment in a private cloud or datacenter.