List of free mock-api stuff for developerππ½
If you're looking for all programming tools around mock-api (not just free). Check this page List of mock-api Programming Tools
mockAPI
MockAPI is a simple tool that lets you easily mock up APIs, generate custom data, and preform operations on it using RESTful interface. MockAPI is meant to be used as a prototyping/testing/learning tool.
Tag: mock-data, API, mock-api
1 Project 4 Resources per project
Mockfly
Unlock the next level of agile development with our all-in-one solution for feature flag management and API mocking. Seamlessly integrate, test, and control new features, while mocking APIs to accelerate your development cycle.
Tag: mock-api
500 requests per day 1 projects 4 endpoints 2 responses per endpoint Unlimited flags Unlimited evaluations per flag

ExtendsClass's CSV Generator
Web-based random data generator. Generate CSV, JSON and SQL datasets. Free API.
Tag: mock-data, mock-api, json
No limit in the browser 200 API requests/day 5000 rows per call
Json Server
Get a full fake REST API with zero coding in less than 30 seconds (seriously) with your own JSON file
Tag: API, mock-api

Mocko
Proxy your API, choose which endpoints to mock in the cloud and inspect traffic, for free. Speed up your development and integrations tests.
Tag: mock-api, api
Proxy your API, choose which endpoints to mock in the cloud and inspect traffic
Mocki
Create, run and deploy mock APIs in minutes. Use your mock API to run tests independent of external services, design APIs and remove backend dependencies for your frontend team.
Tag: mock-api
No clear limit, but you can easily paste your response and link will be generated

Beeceptor
Get an HTTP endpoint to build mock APIs. Beeceptor intercepts HTTP requests for you to mock in real-time. Create rules to simulate a slow API.
Tag: mock-api
50 requests/day (per day, per endpoint)

Mocky
Don't wait for the backend to be ready, generate custom API responses with Mocky and start working on your application straightaway
Tag: mock-api
No ads, no subscriptions or service limits. Your mocks will be available if you call it at least one time per year, but without any guarantee

Mockoon
Mockoon is the easiest and quickest way to run mock REST API servers. No remote deployment, no account required, free, open source and cross-platform.
Tag: mock-api