Feature

API Testing Tooling

Built-in contract, integration, and load testing.

18 providers 76 APIs 12 declared variants

The platform provides or integrates test tooling — contract tests, assertions, synthetic monitors, or load runs — so regressions surface before customers find them.

18 API providers on the APIs.io network offer api testing tooling. The highest-rated are Speakeasy, UiPath, Amazon EC2 Image Builder, Apideck, Artillery.

Providers

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Exemplar 2 Complete, well-documented, and agent-ready
SpeakeasySpeakeasy provides an AI control plane platform that lets enterprises govern, secure, and observe AI agents...1 published contract68.3UiPathUiPath is an enterprise automation platform offering robotic process automation (RPA), AI-powered automatio...6 published contracts66.8
Strong 5 Solid coverage with minor gaps
Amazon EC2 Image BuilderEC2 Image Builder simplifies the building, testing, and deployment of Virtual Machine and container images ...1 published contract60.3ApideckApideck is the leading Unified API that doesn't store sensitive customer data. Build and maintain native in...7 published contracts58.8ArtilleryArtillery is an open source load testing and performance testing platform for APIs, microservices, and web ...1 API57.4ApidogApidog is an all-in-one API development platform that connects the entire API lifecycle: visual API design,...1 published contract56.7SoracomSoracom is a global IoT cellular connectivity and platform provider headquartered in Tokyo, founded in 2014...10 published contracts55.7
Developing 8 Usable, with meaningful gaps to close
AklivityAklivity builds Zilla, a stateless, source-available multi-protocol gateway for event-driven applications a...4 APIs53.2APIContextAPIContext (formerly APImetrics) is a synthetic API testing, monitoring and conformance platform. It calls ...6 published contracts51.6AssertibleAssertible provides a reliable first line of defense against web service failures by providing simple and p...1 published contract48.2ApinizerApinizer is an API management platform that provides API gateway, API portal, API testing, monitoring, and ...1 published contract47.4CerbosCerbos is an open-core, language-agnostic, scalable authorization platform that decouples access control fr...1 published contract44.1ApiaryApiary is an API design and documentation platform, now part of Oracle Cloud Infrastructure. With 486,000+ ...1 published contract43.9Apache JMeterApache JMeter is an open-source Java application designed for load testing functional behavior and measurin...1 published contract41.4Department of Veterans Affairs (VA Lighthouse)VA Lighthouse is the US Department of Veterans Affairs' developer API platform. Published at developer.va.g...24 published contracts40.4
Thin 2 Limited public surface area
AgentQLAgentQL connects LLMs and AI agents to the entire web through a specialized query language, REST API, and P...5 APIs30.3ApiShareApiShare is an API governance platform that provides a unified operational model for API lifecycle manageme...1 API29.4
Emerging 1 Early or largely undocumented
APIGitAPIGit is a Git-native platform for full lifecycle API development that combines version control, API desig...4 APIs25.9

What Providers Actually Declared

This feature is a canonical term. These are the free-text strings providers wrote in their own apis.yml that map onto it.

API TestingAutomated API TestingAutomated TestingHTTP Load TestingJSON Schema ValidationLighthouse OAS contract testing via the public lighthouse-oas-tests repositoryLive API TestingPlaywright IntegrationSchema ValidationSoracom Sandbox API at api-sandbox.soracom.io for safe integration testingSynthetic API TestingTest Automation

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Tools for features

3 MCP tools reach this
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

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