Testing is one of the API Evangelist areas on the APIs.io network — a focused corner of the API landscape. The full area lives at testing.apievangelist.com.
30 providers on the network work in this area, including Postman, Checkly, BrowserStack, UiPath, Tricentis, TempMailGrab API, and 24 more — each links out to that provider’s APIs, schemas, and governance artifacts.
Related areas: AI Automation, Developer Experience, Documentation, and Monitoring. Browse every area at areas.apis.io.
About this area
A curated index of services, tooling, and open source solutions for API testing, mocking, load testing, contract testing, and quality assurance. This collection covers functional…
Related providers (137)
Top 30 of 137 network providers tagged for this area — search the full set on apis.io.
| Provider | Description | APIs | Rating |
|---|---|---|---|
| Postman | Postman is the world's leading API platform, used by 35+ million developers to design, build, test, document, mock, monitor, and govern APIs across the entire API lifecycle. The... | 21 | exemplar |
| Checkly | Checkly is a code-first reliability platform for synthetic monitoring, uptime monitoring, alerting and AI-assisted incident investigation. Engineering teams define monitors as v... | 1 | exemplar |
| BrowserStack | BrowserStack provides instant access to 3,500+ real desktop browsers and 30,000+ real mobile device units for manual and automated software testing. Its products span cross-brow... | 1 | strong |
| UiPath | UiPath is an enterprise automation platform offering robotic process automation (RPA), AI-powered automation, and agentic automation capabilities. The platform includes Orchestr... | 6 | strong |
| Tricentis | Tricentis is an enterprise continuous testing and quality engineering company, founded in Austria in 2007 and headquartered in Vienna with US operations in Austin, Texas. Its pl... | 8 | strong |
| TempMailGrab API | Privacy-first disposable/temporary email service with private 24-hour inboxes, real-time WebSocket delivery, automatic OTP and verification-link extraction, attachments, webhook... | 1 | strong |
| Stack Moxie | Stack Moxie is a revenue-observability platform that provides continuous testing and monitoring for AI, marketing, and RevOps technology stacks. It watches integrated SaaS platf... | 2 | strong |
| Gradle | Gradle Inc. (Gradle Technologies) is the company behind the open-source Gradle Build Tool, downloaded more than 25 million times a month across the Java, JVM, Android, Kotlin, C... | 1 | strong |
| Treblle | Treblle helps engineering and product teams build, ship and understand their REST APIs in one single place. Empowering API producers by showing actionable data in real-time wher... | 1 | strong |
| Signadot | Signadot is a Kubernetes-native platform for validating microservices and AI-generated code changes against real dependencies before merge. Its core is environment virtualizatio... | 1 | strong |
| Artillery | Artillery is an open source load testing and performance testing platform for APIs, microservices, and web applications. Built with Node.js and available as an npm package, Arti... | 1 | strong |
| Speakeasy | The platform to Build APIs your users love. Best in class API tooling for robust SDKs, API docs, Terraform providers and end-to-end testing. | 1 | developing |
| Amazon CodeBuild | AWS CodeBuild is a fully managed continuous integration service that compiles source code, runs tests, and produces ready-to-deploy software packages. CodeBuild scales continuou... | 2 | developing |
| Scorecard | Scorecard is a simulation and evaluation platform for building, testing, and deploying frontier AI agents. Teams run their agents through thousands of realistic scenarios, judge... | 1 | developing |
| TestFairy | TestFairy is a mobile app testing and distribution platform, now part of Sauce Labs, that lets teams upload iOS and Android builds, distribute them to beta testers, and record v... | 1 | developing |
| Coval | Coval is the deployment-readiness platform for voice and chat AI agents. Teams simulate thousands of realistic conversation scenarios before launch, monitor real production call... | 20 | developing |
| APIContext | APIContext (formerly APImetrics) is a synthetic API testing, monitoring and conformance platform. It calls the APIs you depend on from cloud locations around the world on a sche... | 2 | developing |
| Kubeshop | Kubeshop is the company behind Testkube, an open-core, Kubernetes-native test orchestration platform. Testkube runs agents inside Kubernetes clusters under a central control pla... | 3 | developing |
| Opkey | Opkey (Smart Software Testing Solutions, Inc.) is a US-headquartered Cloud Application Lifecycle Management and AI-powered test automation vendor for enterprise packaged applica... | 1 | developing |
| Rainforest QA | Rainforest QA is a no-code software testing platform that combines AI-powered test creation, crowdsourced manual QA, and automated browser testing in one place. Its REST API and... | 1 | developing |
| Assertible | Assertible provides a reliable first line of defense against web service failures by providing simple and powerful assertions to test and monitor APIs. It enables automated API ... | 1 | developing |
| Automation Preflight API | A self-serve REST API by TinyOps Studio LLC that inspects a public URL and returns deterministic, bounded JSON integration-readiness evidence across reachability, integration su... | 2 | developing |
| Sauce Labs | Sauce Labs is a cloud-based cross-browser and mobile app testing platform trusted by over 100,000 customers worldwide. It provides a comprehensive set of REST APIs for managing ... | 2 | developing |
| Panaya | Panaya is an enterprise change-intelligence and agentic-testing platform for business applications, helping organizations de-risk changes to SAP (including S/4HANA migrations an... | 1 | developing |
| Azure DevTest Labs | Azure DevTest Labs enables developers to efficiently self-manage virtual machines and PaaS resources without waiting for approvals. DevTest Labs creates labs consisting of pre-c... | 1 | developing |
| Parea AI | Parea AI is an LLM evaluation, testing, and observability platform designed for AI engineering teams building production-ready LLM applications. The platform provides a REST API... | 1 | developing |
| LambdaTest | LambdaTest (rebranding as TestMu AI) is a cloud-based AI-powered test execution platform that enables developers and QA teams to run Selenium, Cypress, Playwright, and Appium au... | 2 | developing |
| accessiBe | accessiBe is a web accessibility technology company whose products help organizations make websites and web applications usable by people with disabilities and compliant with WC... | 1 | developing |
| Emerge Tools | Emerge Tools is a mobile developer-tools platform used by teams at DoorDash, Square, and Duolingo to ship faster, smaller, better-performing iOS and Android apps. Its products i... | 1 | developing |
| Confident Cannabis | Confident Cannabis (CC Software LLC, operating as Confident LIMS) is a cloud-based Laboratory Information Management System for analytical testing labs and their clients across ... | 3 | developing |
Related areas
AI Automation (3 shared)
Developer Experience (2 shared)
Documentation (2 shared)
Monitoring (2 shared)
Webhooks (1 shared)
API Evangelist Discovery (1 shared)
Cohort brief
Auto-generatedThe 30 providers in the APIs.io catalog working in Testing, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
Providers
30
all scored
Mean Kin Score
53.7
+29.9 vs catalog 23.8
Mean Agent Readiness
31.9
+20.3 vs catalog 11.6
Spread
43.6–72.5
median 52.4 · σ 7.9
How the 30 split by band
Exemplar 2Strong 9Developing 19Thin 0Emerging 0Minimal 0
Facet averages, against the whole catalog
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Contract Quality | 57.1 | 19.8 | +37.3 | 30 |
| Developer Ergonomics | 59.7 | 23.3 | +36.4 | 30 |
| Access Clarity | 60.1 | 26.3 | +33.8 | 30 |
| Operational Transparency | 41.6 | 13.9 | +27.7 | 30 |
| Discoverability | 73.6 | 61 | +12.6 | 30 |
| Contract Governance | 16.1 | 6.3 | +9.8 | 30 |
A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.
What this cohort publishes
| Artifact | This cohort | Catalog | Difference |
|---|---|---|---|
| MCP server (any) | 43% | 10% | +33 |
| MCP server (first-party) | 37% | 9% | +28 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 20% | 11% | +9 |
| Security | 100% | 97% | +3 |
| Arazzo workflows | 13% | 2% | +11 |
| Governance rules | 30% | 14% | +16 |
mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.
Top by Kin Score
- 1 Postman 72.5
- 2 Checkly 71.1
- 3 BrowserStack 66.1
- 4 UiPath 66.1
- 5 Tricentis 64.7
- 6 TempMailGrab API 62.6
- 7 Stack Moxie 58.6
- 8 Gradle 55.8
- 9 Treblle 55.8
- 10 Signadot 55
Top by Agent Readiness
- 1 APIContext 54.9
- 2 Checkly 54.8
- 3 Kubeshop 50
- 4 Tricentis 44.6
- 5 accessiBe 44.1
- 6 Coval 43.6
- 7 Scorecard 41.2
- 8 Postman 39.1
- 9 BrowserStack 38.9
- 10 Assertible 34.7
All 30 members of this roster resolve to a scored provider in
the catalog.Generated from the catalog build of
9 September 2026, across 27528
providers, using the same computation served by the
APIs.io cohort API. Briefs are published for rosters of
5 or more scored providers; below that a distribution is not meaningful.
Work with this as data
Every area here is available over the APIs.io API and to AI agents over MCP.