Dev tools · alternatives · 2026
24 alternatives to ApiNotes
Hi HN I built ApiNotes Mock Server, a small tool that generates a live mock REST API from an OpenAPI (3.0/3.1) or Swagger 2.0 spec. The goal was to remove all friction when you just need a mock API quickly: No sign-up required to create an anonymous mock Supports paste, file upload, or URL fetch Produces a base URL + an auto-generated endpoints list Anonymous mocks currently expire after 72 hours (you can register to keep them / get higher limits) Link: https://apinotes.io/mock-server I’d love feedback on: What would make you trust a mock server like this for real…
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
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Generate custom data & API to build apps in less than 30s
2021 · retool.com · its alternatives →
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Apidog▲570Development teams often struggle with using multiple tools like Postman and Swagger for API design, development, and testing. This fragmented approach leads to outdated API specs and chaotic collaboration. So we built Apidog: a single, unified API platform for team collaboration. It has a beautiful interface that makes it easy to create API spec, generate request data from API spec, validate responses, create mock data, orchestrate test scenarios, and publish API documentation. Apidog = Postman + Swagger + Mock + JMeter.
2024 · apidog.com · its alternatives →
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Develop APIs fast + automatically detect endpoints
2025 · fastrequest.apidog.com · its alternatives →
- 4
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.
2017 · mockoon.com · its alternatives →
- 5
MockAPI Dog▲122Instant mock REST & LLM APIs - free, no signup required
Feb 2026 · mockapi.dog · its alternatives →
- 6
A generator for OpenAPI 3. Contribute to egorsmkv/openapi3-generator development by creating an account on GitHub.
2020 · github.com · its alternatives →
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Hi HN! I'm Ankit, the founder of Beeceptor, a request mocking and intercepting tool. This time, I built something new to address a pain I’ve personally felt (and heard from dozens of QA, frontend, and platform teams): making OpenAPI specs actually useful during development. API contracts just sit around as docs often. What if you could 'activate' them, instantly have a realistic, hosted mock server-with contract validation, smart test data, and early usage? So I made _Mockaroo for OpenAPI_, but with brains. It spins up a hosted mock server from your spec in one click. It: - Generates…
2025 · beeceptor.com · its alternatives →
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Hi HN, I built the first version of Mocktail years ago. I recently came back to the project, and after a pretty substantial rebuild, v4 is now out. Mocktail is a free and open-source, self-hosted mock API server with a built-in dashboard and database, packaged as a single ~25 MB binary. You can run it locally or on your own infrastructure — no account or hosted service required. You can define endpoints and responses, generate realistic data per request, customize headers, status codes and latency, and inspect incoming requests in real time. With v4, I also added MCP support, so coding…
Aug 2026 · getmocktail.com · its alternatives →
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Hey HN! We've developed OpenAPI AutoSpec, a tool for automatically generating OpenAPI specifications from localhost network traffic. It’s designed to simplify the creation of API documentation by just using your website or service, especially useful when you're pressed for time. Documenting endpoints one by one sucks. This project originated from us needing it at our past jobs when building 3rd-party integrations. It acts as a local server proxy that listens to your application’s HTTP traffic and automatically translates this into OpenAPI 3.0 specs, documenting endpoints, requests, and…
2024 · github.com · its alternatives →
- 12MO
2019 · mockit.netlify.com · its alternatives →
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Your playground for writing custom API security tests
2023 · akto.io · its alternatives →
- 15
Prism▲79Accelerate API development with realistic mock servers
2023 · stoplight.io · its alternatives →
- 16
Generate customized, realistic mock data & APIs, via GPT
2023 · its alternatives →
- 17
Pollux▲82Fake json data & json server mock API generator with JWT
2021 · mohammedal-rowad.github.io · its alternatives →
- 18
With Stoplight, you can create OpenAPI descriptions, documentation, and mock servers much faster than other API tools — with no specialized knowledge required — all in one centralized platform.
2016 · stoplight.io · its alternatives →
- 19
Mock REST endpoints in seconds. Test without backend delays. Built for developers who need reliable mock data now.
2017 · mockrest.com · its alternatives →
- 20
Routebase▲106Design, mock, test, and document APIs from one living spec. Full test runner built in: suites, scenarios, ten auth schemes, CLI in CI. No OpenAPI needed.
Jul 2026 · routebase.dev · its alternatives →
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Progressive Web App for generating mocked data from an OpenAPI specification - Fredx87/openapi-mock-generator
2020 · github.com · its alternatives →
- 23ST
2024 · endpts.io · its alternatives →
- 24
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →