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Dev tools · alternatives · 2026

24 alternatives to Reagent – Test APIs Declaratively

declarative API testing. Contribute to whytheplatypus/reagent development by creating an account on GitHub.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Reagent – Test APIs Declaratively launched in 2020; newer entries below may have overtaken it.

  1. 1

    GitHub for Agents

    2025 · relace.ai · its alternatives →

  2. 2

    :boom: Test REST, GraphQL APIs. Contribute to kiranz/just-api development by creating an account on GitHub.

    2018 · github.com · its alternatives →

  3. 3
    req▲71

    A lightweight, minimal yet powerful API testing tool

    2022 · npmjs.com · its alternatives →

  4. 4

    The easiest way to test APIs

    2017 · its alternatives →

  5. 5

    OpenAgents - The collaboration OS for AI agents. Contribute to openagents-org/openagents development by creating an account on GitHub.

    Apr 2026 · open-agents.dev · its alternatives →

  6. 6

    An open benchmark for AI agents that test APIs

    May 2026 · resources.kusho.ai · its alternatives →

  7. 7

    Powerful declarative API testing that works for you!

    2019 · its alternatives →

  8. 8

    Contribute to ovidiuiliescu/simpleagentchat development by creating an account on GitHub.

    Jul 2026 · github.com · its alternatives →

  9. 9
    ReqTest▲12

    Powered api testing that actually gets you

    2025 · its alternatives →

  10. 10

    Deterministic snapshot testing for AI agents. Contribute to iamfaham/AgentSnap development by creating an account on GitHub.

    Jul 2026 · github.com · its alternatives →

  11. 11

    Agentic testing for agentic codebases. Contribute to langwatch/scenario development by creating an account on GitHub.

    2025 · github.com · its alternatives →

  12. 12

    A Declarative HTTP Client for Python. Contribute to prkumar/uplink development by creating an account on GitHub.

    2017 · github.com · its alternatives →

  13. 13

    A simple and opinionated HTTP scripting language. Contribute to andrewpillar/req development by creating an account on GitHub.

    2022 · github.com · its alternatives →

  14. 14

    Analytics for APIs. Contribute to apinalytics/apinalytics development by creating an account on GitHub.

    2014 · github.com · its alternatives →

  15. 15

    Hey HN! I'm excited to share Reagent, an open source Javascript framework to build UI rich AI agents using graph based workflow. Github: https://github.com/reagentai/reagent There are already amazing tools for building agents but most of them seem to be focused on building the AI workflow on the backend with markdown as final output. There is generative UI in AI SDK from vercel but it seems to work only with server components afaik. So, I created a framework for building AI agents with interactive UI components; you can render any component from LLM tool, update it's…

    2024 · github.com · its alternatives →

  16. 16

    Need a human in the loop developer assistant?

    2025 · github.com · its alternatives →

  17. 17

    Create repos and commits with AI. Contribute to jamesmurdza/gitwit-agent development by creating an account on GitHub.

    2023 · github.com · its alternatives →

  18. 18

    :boom: Test REST, GraphQL APIs. Contribute to kiranz/just-api development by creating an account on GitHub.

    2018 · github.com · its alternatives →

  19. 19

    Dummy API, rest API, AI Generated API Response

    2025 · dummyapi.uk · its alternatives →

  20. 20
    GitHub▲12

    Pyali786/tutorial-py

    2025 · github.com · its alternatives →

  21. 21

    At Metabase, we built an AI agent called Repro-Bot that reads our GitHub issues and attempts to reproduce reported bugs automatically. It started as a hackathon project and is now part of our daily workflow, so we wrote about it and open-sourced the code as an example for others. How have similar tools been working for you? What has worked well and what has not?

    Apr 2026 · metabase.com · its alternatives →

  22. 22

    :boom: Test REST, GraphQL APIs. Contribute to kiranz/just-api development by creating an account on GitHub.

    2018 · github.com · its alternatives →

  23. 23CO

    construct — terminal native agentic development environment

    2019 · zarvis.ai · its alternatives →

  24. 24

    AI that fixes GitHub issues, reviews its own diff, ships PRs

    Apr 2026 · github.com · its alternatives →

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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 →