1
Same kind of online tool · open source · free
An open-source HTTP mock server and validation proxy based on API specifications such as OpenAPI.
Alternatives
The Best APIs Guru Alternatives in 2026
6 alternatives1 free · 3 open source
Looking for something like APIs Guru? Here are 6 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 1 are free or have a free plan and 3 are open source.
REST API specifications in OpenAPI 3.0 format are indexed by APIs.guru.
Top picks at a glance
First suggestionStoplight PrismAn open-source HTTP mock server and validation proxy based…Another optionloopwork-ai/emceeA tool that provides a Model Context Protocol (MCP) server…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | Stoplight Prism | Free | Yes | — |
| 2 | loopwork-ai/emcee | — | Yes | macOS |
| 3 | Beeceptor | — | Not stated | Web |
| 4 | Insomnia | — | Not stated | macOS, Web, Windows |
| 5 | Mockend | Free trial | Not stated | Web |
| 6 | lanyard | — | Yes | — |
All APIs Guru alternatives
2
Also covers api · open source
A tool that provides a Model Context Protocol (MCP) server for any web application with an OpenAPI specification.
3
Beeceptor
beeceptor.comAlso covers api · same kind of online tool
Beeceptor creates REST and SOAP mock APIs with responses generated from prompts or traffic.
4
Insomnia
insomnia.restAlso covers api · same kind of online tool
REST, GraphQL, gRPC, SOAP, and WebSocket APIs can be developed and tested with Insomnia.
5
Also covers api · same kind of online tool
Mockend creates mock REST and GraphQL APIs from a file in a repository.
6
Also covers api · open source
Expose Discord presence and activity through REST and WebSocket APIs with Lanyard.
No alternatives match this filter.
Alternatives to similar tools
Stoplight Prism5 alternativesloopwork-ai/emcee24 alternativeslanyard24 alternativesInsomnia8 alternativesBeeceptor6 alternativesMockend5 alternatives
TopicAPIs & Databases · 93 sites Best-of listBest Free API Testing Tools for Individual Developers ListingAPIs Guru details
What is the best alternative to APIs Guru?
Based on features, tags and platforms, the closest alternatives to APIs Guru are Stoplight Prism, loopwork-ai/emcee, and Beeceptor.
Is there a free alternative to APIs Guru?
Yes. Stoplight Prism is free or offer a free plan.
Are there open-source alternatives to APIs Guru?
Yes: Stoplight Prism, loopwork-ai/emcee, and lanyard.
Alternatives are suggested from the purpose and features described in our listings. Different pages for the same product appear once. Read each description to check whether it fits your task. How we choose alternatives · Suggest an alternative