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, Keploy, SmartBear, Apidog, Bruno, Assertible, and 24 more — each links out to that provider’s APIs, schemas, and governance artifacts.
Related areas: Documentation, Design, Monitoring, and AI Automation. 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 (178)
Top 30 of 178 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... | 22 | exemplar |
| Keploy | Open-source, AI-native testing platform that captures real production API traffic with eBPF and replays it in CI as deterministic tests, auto-generated mocks, and production-lik... | 2 | strong |
| SmartBear | SmartBear is a software company that provides AI-powered tools for API lifecycle management including design, testing, documentation, and governance. Their product portfolio inc... | 1 | strong |
| Apidog | Apidog is an all-in-one API development platform that connects the entire API lifecycle: visual API design, multi-protocol debugging (HTTP, REST, GraphQL, gRPC, WebSocket, SOAP,... | 1 | developing |
| Bruno | Bruno is an open-source (MIT), git-native API client - a lightweight, offline-first alternative to Postman and Insomnia for exploring and testing APIs. It is a developer TOOL, n... | 3 | 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 |
| Testim | Testim is an AI-powered functional test automation platform for web and mobile applications, using machine learning to author, run, and self-heal UI tests. Acquired by Tricentis... | 2 | developing |
| REST Assured | REST Assured is a Java library for simplifying the testing and validation of RESTful APIs. It provides a fluent domain-specific language (DSL) built on the given-when-then BDD p... | 1 | thin |
| SuperTest | SuperTest is a Node.js library for testing HTTP servers by providing a high-level abstraction for HTTP assertions with a fluent API built on SuperAgent. Maintained by the Forwar... | 1 | emerging |
| Step CI | Step CI is an open source API testing and monitoring framework that uses YAML-based workflows to define and run automated API test scenarios. It supports REST, GraphQL, gRPC, tR... | 1 | emerging |
| Muuktest | MuukTest (MuukLabs) is an AI-powered test automation and managed QA services company founded in 2019 that helps software teams reach high end-to-end test coverage in weeks rathe... | 0 | emerging |
| 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... | 2 | exemplar |
| 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... | 9 | 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 |
| Speakeasy | Speakeasy provides an AI control plane platform that lets enterprises govern, secure, and observe AI agents, MCP servers, and Skills. The platform integrates with existing ident... | 2 | 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 |
| 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 |
| Routebase | API lifecycle platform covering Design (visual OpenAPI editor), Mock (spec-driven mock servers), Test (suites, assertions, OWASP security scanning), Document (published docs por... | 2 | 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... | 4 | 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 |
| 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 | strong |
| 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 | 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... | 2 | 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 |
| 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 |
| 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 | strong |
| 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 | strong |
| 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... | 5 | developing |
| Insomnia | Insomnia is an open-source, cross-platform API development platform by Kong for designing, debugging, and testing HTTP, REST, GraphQL, gRPC, SOAP, WebSockets, SSE, and Socket.IO... | 1 | 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... | 2 | developing |
Related areas
Documentation (6 shared)
Design (5 shared)
Monitoring (4 shared)
AI Automation (2 shared)
Command Line Interface (2 shared)
Developer Experience (2 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
52.2
+29.3 vs catalog 22.9
Mean Agent Readiness
31.2
+19.2 vs catalog 12
Spread
12.1–74
median 53.4 · σ 14.7
How the 30 split by band
Exemplar 5Strong 9Developing 12Thin 1Emerging 3Minimal 0
Facet averages, against the whole catalog
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Developer Ergonomics | 58.9 | 23.1 | +35.8 | 30 |
| Access Clarity | 57.1 | 26.4 | +30.7 | 30 |
| Operational Transparency | 43.7 | 13.6 | +30.1 | 30 |
| Contract Quality | 45.5 | 17.6 | +27.9 | 30 |
| Discoverability | 69.6 | 58.2 | +11.4 | 30 |
| Contract Governance | 14.9 | 6.3 | +8.6 | 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) | 60% | 15% | +45 |
| MCP server (first-party) | 50% | 12% | +38 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 17% | 11% | +6 |
| Security | 97% | 98% | -1 |
| Arazzo workflows | 17% | 2% | +15 |
| Governance rules | 30% | 13% | +17 |
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 Checkly 74
- 2 Postman 73.7
- 3 Tricentis 68.5
- 4 BrowserStack 67.8
- 5 UiPath 66.8
- 6 Stack Moxie 64.5
- 7 Routebase 64.3
- 8 TempMailGrab API 62.4
- 9 Artillery 57.4
- 10 Gradle 57
Top by Agent Readiness
- 1 APIContext 60.1
- 2 Checkly 60
- 3 Coval 59.8
- 4 Postman 57.2
- 5 Routebase 52.9
- 6 Scorecard 48.7
- 7 Kubeshop 47.7
- 8 Elva 44.8
- 9 Tricentis 44.6
- 10 BrowserStack 44.1
All 30 members of this roster resolve to a scored provider in
the catalog.
Coverage caveat. 19 of 30 scored members had under half their catalog-attributable points satisfied at all (catalog_earned / catalog_max < 0.5). They are INCLUDED in the mean above. A large share here means the cohort mean is partly a measurement of how far our enrichment reached, not only of how these providers publish.Generated from the catalog build of 3 October 2026, across 28834 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.
Coverage caveat. 19 of 30 scored members had under half their catalog-attributable points satisfied at all (catalog_earned / catalog_max < 0.5). They are INCLUDED in the mean above. A large share here means the cohort mean is partly a measurement of how far our enrichment reached, not only of how these providers publish.Generated from the catalog build of 3 October 2026, across 28834 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.
