API Testing
Providers using this tag (49)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Exemplar 1 Complete, well-documented, and agent-ready
Developing 11 Usable, with meaningful gaps to close
Thin 12 Limited public surface area
Emerging 19 Early or largely undocumented
Minimal 3 Almost no public developer surface
APIs with this tag (32)
Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →
Exemplar 1 Complete, well-documented, and agent-ready
Strong 1 Solid coverage with minor gaps
Developing 9 Usable, with meaningful gaps to close
PactFlowPactFlow is SmartBear's contract testing platform that ensures API changes do not break consumer applicatio...ReadyAPIReadyAPI is SmartBear's API quality platform for functional, security, and performance testing. It supports...Spec Scoring APIPublic, no-auth REST API for scoring OpenAPI documents. GET /api/review/checks returns the full set of chec...Bruno API ClientThe core open-source, git-native desktop API client (a lightweight Postman/Insomnia alternative). Compose a...Bruno API ClientBruno is an open-source API client for exploring and testing REST, GraphQL, and gRPC APIs. Collections are ...Bruno CLI (bru)The @usebruno/cli command-line runner (invoked as bru, installed via npm install -g @usebruno/cli) executes...Testkit (YAML API Testing DSL)MIT-licensed Rust testing tool by the APItoolkit/Monoscope team that uses a simplified YAML DSL for definin...Fiddler EverywhereFiddler Everywhere is a cross-platform web debugging proxy for macOS, Windows, and Linux. It captures HTTP ...Assertible APIAssertible's public programmatic surface, used to drive test runs from a CI/CD pipeline. It consists of two...
Thin 5 Limited public surface area
Traceable API Security PlatformTraceable provides an intelligent API security platform offering API discovery, threat detection and protec...Speedscale PlatformSpeedscale captures production API traffic and replays it in lower environments for load testing, regressio...HoppscotchHoppscotch is a lightweight open-source browser-based API client supporting REST, GraphQL, WebSockets, SSE,...REST AssuredREST Assured is a Java DSL library for testing and validating RESTful APIs using a fluent, BDD-style syntax...Arga APIPublic REST API for Arga's testing infrastructure — provision digital twins, deploy branches/PRs into sandb...
Emerging 16 Early or largely undocumented
GoReplayGoReplay captures live HTTP traffic with libpcap and replays it against a test target, letting teams valida...SchemathesisSchemathesis is a property-based API testing tool that automatically generates test cases from OpenAPI and ...REST ClientREST Client is a Visual Studio Code extension for sending HTTP requests and viewing responses directly with...Thunder ClientThunder Client is the flagship VS Code REST API client extension offering a lightweight GUI for sending HTT...Thunder Client CLIThe Thunder Client CLI (@thunderclient/cli) is a Node.js command-line tool for running Thunder Client reque...RestfoxRestfox is a lightweight, offline-first web HTTP client for testing REST APIs, similar to Postman but brows...Broadcom BlazeMeterContinuous testing platform for API, web, mobile, and performance testing. Exposes a REST API for orchestra...cURL Command Line ToolThe curl command-line tool transfers data to or from a server using URL syntax, supporting protocols includ...Runscope API Monitoring APIREST API for the Runscope (now BlazeMeter API Monitoring) platform. Manages buckets, API tests, environment...SuperTestSuperTest is a Node.js library for testing HTTP servers by providing a high-level abstraction for HTTP asse...DreddDredd is a language-agnostic command-line tool for validating an API description document against a backend...Step CIStep CI is an open source API Quality Assurance framework that is language-agnostic and configured using YA...Noname Active TestingNoname Active Testing enables organizations to test APIs for vulnerabilities and misconfigurations before t...Noname API Security PlatformThe Noname API Security Platform provides comprehensive API security through discovery, posture management,...Mitmproxymitmproxy is a free and open source interactive HTTPS proxy for intercepting, inspecting, modifying, and re...PawPaw (now RapidAPI for Mac) is a full-featured HTTP client that lets you test and describe the APIs you buil...
Companies reaching this through an API (4)
These companies publish an API, specification or operation carrying “API Testing” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.
Score breakdown
Frequency
51.3
log-scaled weighted occurrences
Breadth
1.2
spread across providers
Quality lift
32.8
mean composite of providers using it
Cohesion
9.8
strength of nearest seed neighbor
Where this tag sits
Related tags
API Client 8 co-occurrences
API Design 10 co-occurrences
Performance Testing 7 co-occurrences
API Monitoring 6 co-occurrences
Contract Testing 6 co-occurrences
HTTP Client 7 co-occurrences
Functional Testing 5 co-occurrences
CI/CD 17 co-occurrences
Where this tag comes from
Provider tag51
Api tag32
Work with this as data
Every tag here is available over the APIs.io API and to AI agents over MCP.