Maven
karatelabs/karate
Test Automation Made Simple
MITAug 28, 2026 · metrics 2.10.0
All tags
Catalogue tag
#mock-server
Every repository in the public record carrying this tag — from its GitHub topics or the keywords its package registries publish. Health is measured under the same versioned methodology as the rest of the record.
30 records
npm
stoplightio/prism
Turn any OpenAPI2/3 and Postman Collection file into an API server with mocking, transformations and validations.
Apache-2.0Aug 27, 2026 · metrics 2.10.0
npm
axa-group/oauth2-mock-server
A development and test oriented OAuth2 mock server
MITOct 12, 2026 · metrics 2.10.0
npm
mockoon/mockoon
Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.
MITSep 7, 2026 · metrics 2.10.0
NuGet
dotnet/dev-proxy
Simulate API failures, throttling, and chaos — all from your command line.
MITSep 16, 2026 · metrics 2.10.0
npm · PyPI · crates.io +4
mock-server/mockserver-monorepo
MockServer is an HTTP(S) mock server and proxy for testing that lets you mock APIs, inspect and modify live traffic, and inject failures. It supports HTTP/1.1, HTTP/2, gRPC, WebSockets, TCP and more on a single port, with additional support for HTTP/3, message brokers, and AI/LLM APIs.
Apache-2.0Aug 28, 2026 · metrics 2.10.0
NuGet
wiremock/WireMock.Net
WireMock.Net is a flexible product for stubbing and mocking web HTTP responses using advanced request matching and response templating. Based on WireMock Java, but extended and different functionality. Full documentation can be found at https://wiremock.org/dotnet/.
Apache-2.0Sep 11, 2026 · metrics 2.10.0
npm
CopilotKit/aimock
Mock everything your AI app talks to — LLM APIs, MCP, A2A, AG-UI, vector DBs, search. One package, one port, zero dependencies.
MITAug 27, 2026 · metrics 2.10.0
Maven
greenmail-mail-test/greenmail
Official master for the Greenmail project
Apache-2.0Oct 20, 2026 · metrics 2.10.0
Go · npm
bavix/gripmock
The fastest and most reliable gRPC mock server for testing and development
MITSep 10, 2026 · metrics 2.10.0
npm · PyPI
counterfact/api-simulator
Turn an OpenAPI spec into a local API in one command. Build and test your frontend with custom responses, shared state, and simulated failures, without waiting for the backend.
MITSep 18, 2026 · metrics 2.10.0
npm
receptron/mulmoclaude
Multi-modal Claude Code Client
MITSep 9, 2026 · metrics 2.10.0
npm
pengzhanbo/vite-plugin-mock-dev-server
🚀mock-dev-server is injected into the vite development environment to simulate requests and data responses.在vite 开发环境中注入 mock-dev-server, 模拟请求和数据响应
MITSep 15, 2026 · metrics 2.10.0
npm · Go
marle3003/mokapi
Your API mocking tool for OpenAPI and AsyncAPI using Go and JavaScript - https://mokapi.io
MITSep 6, 2026 · metrics 2.10.0
PyPI
cdelmonte-zg/nanoidp
A lightweight, configurable Identity Provider for development and testing. Supports OAuth2/OIDC and SAML 2.0 protocols with a full-featured web UI for configuration.
MITSep 11, 2026 · metrics 2.10.0
npm
jaredwray/mockhttp
A simple HTTP server that can be used to mock HTTP responses for testing purposes. Inspired by httpbin and built using nodejs and fastify with the idea of running it via https://mockhttp.org, via docker jaredwray/mockhttp, or nodejs npm install jaredwray/mockhttp.
MITSep 14, 2026 · metrics 2.10.0
Go
unkn0wn-root/resterm
Terminal API client for HTTP, GraphQL and gRPC. Plain .http files you can diff and version, with workflows, mocks, profiling, tracing, OpenAPI import, SSH tunnels, Kubernetes port-forwards, WebSocket, SSE and a CLI runner.
Apache-2.0Sep 13, 2026 · metrics 2.10.0
Go
httptape/httptape
HTTP traffic recording, sanitization, and replay library for Go. Record real API interactions, automatically redact secrets and PII, replay as mock server. Embeddable, zero dependencies, sanitize-on-write.
Apache-2.0Oct 19, 2026 · metrics 2.10.0
Go · npm
dever-labs/mockly
Cross-platform multi-protocol mock server — HTTP, WebSocket, gRPC, GraphQL, TCP, Redis, SMTP, MQTT — with a web UI, scenario system, and fault injection.
MITSep 10, 2026 · metrics 2.10.0
Go
mockzilla/mockzilla
Open-source OpenAPI mock server with cloud hosting and local modes for development, testing, and CI. Generates realistic API responses from specs with latency simulation, error injection, proxy fallback, and request validation. Validated against 2,200+ real-world OpenAPI specs.
MITSep 19, 2026 · metrics 2.10.0
RubyGems · PyPI
4commerce-technologies-AG/midi-smtp-server
The highly customizable ruby SMTP-Server and SMTP-Service library with builtin support for AUTH and SSL/STARTTLS, 8BITMIME and SMTPUTF8, IPv4 and IPv6 and additional features.
MITSep 18, 2026 · metrics 2.10.0
Go
imposter-project/imposter-cli
CLI for the Imposter mock engine, a scriptable, multipurpose mock server.
Apache-2.0Oct 21, 2026 · metrics 2.10.0
Go
INTENTIUS/mudflaps
Stateful local emulator of the Fly.io Machines API (flaps) — like LocalStack, for Fly Machines. Test Machines-API clients offline.
MITOct 20, 2026 · metrics 2.10.0
NuGet
cezarypiatek/GRPC-Mock-Server
Super fast, platform independent, standalone component for mocking GRPC services using WireMock.NET stubbing engine
MITSep 21, 2026 · metrics 2.10.0
Go
lfdubiela/mockwave
HTTP mock server with Goja scripting, MCP integration for AI-assisted rule generation, and a real-time admin UI. Local dev or deployed.
MITSep 19, 2026 · metrics 2.10.0
Go
jumppad-labs/polymorph
A fake service simulator for building realistic microservice architectures. Define services in HCL and spin up HTTP, TCP, Connect-RPC, PostgreSQL, and reverse proxy endpoints with auto-generated APIs, fake data, latency injection, and error simulation.
No licenseSep 19, 2026 · metrics 2.10.0
RubyGems
mocktools/ruby-dns-mock
DNS mock server written on 💎 Ruby. Mimic any DNS records for your test environment with fake DNS server.
MITSep 12, 2026 · metrics 2.10.0
npm
Guebbit/openapi-runnable-collections
No repository description published.
MITSep 30, 2026 · metrics 2.10.0
Go
l3acler/Holo
Zero-config, single-binary mock REST API server from a JSON file. Written in Go.
MITSep 8, 2026 · metrics 2.10.0
Maven · npm
wiremock/wiremock
A tool for mocking HTTP services
Apache-2.0Aug 28, 2026 · metrics 2.10.0