api-simulator

Universal REST Simulator is a universal simulator for REST APIs. This simulator can be configured by adding some configuration files into the config directory. Universal REST Simulator can read all files with the extension .

An instant, high-fidelity mock API server for the Mojave wasteland. Forge your backend infrastructure from simple blueprints (PIML) while the real world burns. Features real-time request logging, latency simulation, and a rugged Pip-Boy inspired TUI.

Lightweight mock server for custom delays, HTTP status codes, and mutated JSON schemas.

API Simulator - configuration-driven tool for modeling and running of API simulations

Mock server to help development of UI and Mobile apps

A dummy graph.facebook.com (WhatsApp Cloud API) for load testing — Meta-accurate responses, webhooks, rate limits & a live dashboard.

Smart access provider simulator for Nuki-style APIs, webhooks, and lock demos

An API simulator and mocking tool designed for quick and powerful prototypes

An npm package to quickly set up a mock API server for testing and development purposes.

Turn an OpenAPI spec into a stateful, running API simulator. Infers resource lifecycles and transitions from your spec, generates deterministic seeded data, and serves it over HTTP — no handcrafted mock fixtures

Demo applications to test the capabilities of Traffic Parrot API and service simulators.

Lightweight OpenStack API simulator — Keystone, Nova, Cinder, Glance, Neutron, Placement, Octavia, Swift and CloudKitty on their native ports in one ~90 MB Python process. A DevStack alternative for testing python-openstackclient, the OpenStack SDK and Terraform with no hardware and no VMs.

Stateful asynchronous Proxmox VE API simulator for testing API clients and infrastructure tooling without a real hypervisor cluster.

Simulating the API you need during development and testing, written in go

Simulate Nuki-style smart lock APIs, webhooks, keypad codes, and device states locally for integration testing without hardware or production access