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Developer ToolsAlternative to DreddAlternative to Postman Automated TestsAlternative to Restler

Schemathesis

Modern property-based testing tool for web APIs using OpenAPI and GraphQL schemas.

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LicenseMIT
GitHub stars2.8k
Last commit1 weeks ago
Tags6 topics
Property Based TestingApi FuzzingOpenapi TestsContract TestingDeveloper ToolsPython
Overview

Why consider Schemathesis?

Schemathesis is a property-based contract testing tool for web APIs written in Python by Dmitry Dygalo. It reads OpenAPI, Swagger, or GraphQL specifications, generating thousands of negative and edge-case test payloads automatically to find 500 server crashes and schema violations.

Guided learning

Learn Schemathesis by building

Practical setup notes, real use cases, and copy-ready examples in one focused guide.

1 min read 2 sections
In this guide2 sections

Overview of Schemathesis

Schemathesis discovers unhandled server exceptions and API spec non-compliance without writing manual tests.

Quickstart

bash
1pip install schemathesis
2st run https://example.com/openapi.json

Schemathesis is licensed under the permissive MIT License.

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Schemathesis FAQs

Schemathesis is listed as a Developer Tools tool on TiloBox. Review the overview, features, and official documentation on this page to decide whether it solves your specific workflow.

Start with the project's GitHub repository and official website for supported installation and deployment instructions. Test the setup with representative data or a small project before rolling it out more widely.

Schemathesis is listed under the MIT license. Read the complete license text and the project's notices before using, modifying, or distributing the software.

Production readiness depends on your requirements. Review maintenance activity, security practices, documentation, backup and upgrade procedures, and compatibility with your stack; then validate it in a non-production environment.

Schemathesis is listed as an alternative to Dredd. Compare the core workflow, deployment model, integrations, and licensing against your must-have requirements before switching.