Dev tools · alternatives · 2026
24 alternatives to Mayhem for API
Automated REST API testing to find bugs in minutes
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier. Mayhem for API launched in 2021; newer entries below may have overtaken it.
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Sparrow▲331The Open Source API Testing Tool For All Developers
2024 · sparrowapp.dev · its alternatives →
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Discover, Scan, and Secure every API at scale
2025 · getastra.com · its alternatives →
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APIEval-20▲121An open benchmark for AI agents that test APIs
May 2026 · resources.kusho.ai · its alternatives →
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Develop APIs fast + automatically detect endpoints
2025 · fastrequest.apidog.com · its alternatives →
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FetchSandboxfree tier, from $5/mo▲347API integration testing that remembers what breaks
Jul 2026 · fetchsandbox.com · its alternatives →
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- 10WB
Hi, this is Mish and Sebastian. We are working on Step CI - a fully automated API testing platform for developers. Step CI works programming-language independent and for different API paradigms (REST, GraphQL, XML). Our CLI and test runner are available on GitHub (https://github.com/stepci) under the MPLv2 license. Since our last launch, Step CI is now able to generate automated tests for your API based on your OpenAPI (Swagger) spec. This saves you a lot of time as you never have to write and maintain your tests again! We would like to invite you to try our tool and give us…
2022 · stepci.com · its alternatives →
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Free online tool to test APIs and autogenerate documentation
2018 · its alternatives →
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Your playground for writing custom API security tests
2023 · its alternatives →
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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 →
- 16IR
Sharing an internal tool that accelerated my development work 10-fold, especially with API debugging. Thought fellow developers here might find it useful. As a developer, I often have trouble reproducing errors at the client end. https://intercept.rest lets me debug and monitor API requests and responses. It is similar to the Network tab in Chrome Developer Tools but works for any API: mobile apps, webhooks, frontend etc. After I shared it with a close circle of friends, they found it incredibly useful and even found new use cases, I never imagined. Been a long time lurker here and…
2018 · its alternatives →
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- 18NW
2021 · github.com · its alternatives →
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Powerful tool for API flow integration, testing, prototyping
2020 · its alternatives →
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A black-box evaluation of how AI-generated tests find functional bugs in live APIs.
Jun 2026 · resources.kusho.ai · its alternatives →
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TestMagic▲53AI-powered API test automation. Save 90% of testing time
2025 · irual.me · its alternatives →
- 24OS
tl;dr we released openapi.security, an online tool that performs a dozen of security tests on any given openapi/swagger-based API, with no signup or email required. You can try it here: https://openapi.security My team at Escape (YC W23) is mainly focused on securing GraphQL APIs. For this, we developed a new approach called Feedback driven API Exploration. Basically, we infer the right security tests cases to run using the specification and a carefully crafted in house graph traversal algorithm. (It's a bit long to describe here but we published a more in depth explanation of…
2023 · openapi.security · 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 →