What it does
Apidog is an API development workspace that connects design, request debugging, mocking, testing, and documentation to shared API definitions. Teams can start from an OpenAPI specification or from real requests, add assertions and test scenarios, generate mock endpoints, and publish interactive docs. It is a tool for building and working with APIs, not a provider of the external business APIs that its client can call. Apidog offers both web and desktop apps, with a free plan for small teams.
Pick a design-first or request-first start
Apidog's getting-started guide recommends opening a project or importing an existing one. In a design-first project, define an endpoint and its request and response shape, then send a request, add an assertion, build a test scenario, and share the documentation. In a request-first project, start by calling an existing endpoint, then turn that work into a specification and reusable tests. These two modes make the tool useful both for a new API and for documenting a backend that has little existing documentation.
Once the specification is in the project, Apidog can validate responses against it, create mock endpoints, and organize multi-step tests with visual flow control. The same project can publish interactive API docs, which helps prevent separate request collections, mock definitions, and docs from drifting apart. The official page also lists import support for formats including OpenAPI/Swagger, Postman, Insomnia, HAR, and WSDL.
The free plan covers up to four users and includes the core API client, mocking, testing, and documentation features. The comparison page lists paid tiers and enterprise controls such as SSO, SCIM, audit logs, and on-premises deployment; the enterprise on-premises edition runs in the customer's infrastructure. Desktop apps are available for Windows, macOS, and Linux in addition to the web app. No API requests or tests were run for this listing.
Strengths
- Keeps API specifications, saved requests, mocks, tests, and published docs connected to one project.
- Supports both design-first specification work and request-first exploration of an existing API.
- The free plan includes core collaboration and API workflows for teams of up to four users.
Watch out for
- The free plan is limited to four users, while several governance and enterprise deployment controls require higher tiers.
- Apidog sends requests to the APIs supplied by the user; it does not replace the external API provider or its access terms.
Best for
- Teams that want API design, debugging, mocks, tests, and documentation tied to the same definition.
- Exploring an existing HTTP API and turning requests into reusable tests or documentation.
- Small teams seeking a shared API workflow with both web and desktop clients.
Sources
- Apidog: All-in-One API Platform: Design, Debug, Mock, Test, and Document (Oct 26, 2026)
- Get Started with Apidog - Apidog Docs (Oct 26, 2026)
- Apidog Pricing - Plans & Pricing for Subscription (Oct 26, 2026)