Schemathesis

aid: schemathesis
name: Schemathesis
description: Schemathesis is a property-based API testing tool that automatically generates test cases from OpenAPI and GraphQL
  schemas to find bugs and specification violations. It uses the Hypothesis property-based testing framework to generate diverse,
  edge-case-covering test inputs from schema constraints, detecting server crashes, response schema violations, validation
  bypasses, and stateful bugs in multi-step workflows. Used by Netflix, SAP, Red Hat, IBM, and JetBrains.
type: Index
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- API Testing
- Contract Testing
- Fuzzing
- OpenAPI
- Property-Based Testing
- Schemathesis
url: https://raw.githubusercontent.com/api-evangelist/schemathesis/refs/heads/main/apis.yml
created: '2026-03-25'
modified: '2026-05-02'
specificationVersion: '0.19'
apis:
- aid: schemathesis:schemathesis
  name: Schemathesis
  description: Schemathesis is a property-based API testing tool that automatically generates test cases from OpenAPI and
    GraphQL schemas to find bugs and spec violations. It detects server crashes, schema violations, validation bypasses, and
    integration failures with minimal maintenance overhead—tests adapt automatically as schemas evolve.
  humanURL: https://schemathesis.io
  tags:
  - API Testing
  - Contract Testing
  - Fuzzing
  - GraphQL
  - Hypothesis
  - OpenAPI
  - Property-Based Testing
  - Python
  properties:
  - type: Documentation
    url: https://schemathesis.readthedocs.io
  - type: GitHubRepository
    url: https://github.com/schemathesis/schemathesis
  - type: PyPI Package
    url: https://pypi.org/project/schemathesis/
  - type: GettingStarted
    url: https://schemathesis.readthedocs.io/en/stable/getting-started.html
  - type: Docker Image
    url: https://hub.docker.com/r/schemathesis/schemathesis
  - type: GitHub Action
    url: https://github.com/schemathesis/action
  - type: ChangeLog
    url: https://github.com/schemathesis/schemathesis/releases
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/schemathesis/refs/heads/main/json-schema/schemathesis-config-schema.json
  - type: JSONStructure
    url: https://raw.githubusercontent.com/api-evangelist/schemathesis/refs/heads/main/json-structure/schemathesis-config-structure.json
  - type: JSONLD
    url: https://raw.githubusercontent.com/api-evangelist/schemathesis/refs/heads/main/json-ld/schemathesis-context.jsonld
  - url: graphql/schemathesis-graphql.md
    type: GraphQL
common:
- type: DomainSecurity
  url: security/schemathesis-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/schemathesis-io
- type: Website
  url: https://schemathesis.io
- type: Documentation
  url: https://schemathesis.readthedocs.io
- type: GitHubOrganization
  url: https://github.com/schemathesis
- type: PyPI Package
  url: https://pypi.org/project/schemathesis/
- type: Docker Image
  url: https://hub.docker.com/r/schemathesis/schemathesis
- type: Blog
  url: https://schemathesis.io/blog
- type: Research
  url: https://dl.acm.org/doi/10.1145/3510003.3510097
- type: Vocabulary
  url: https://raw.githubusercontent.com/api-evangelist/schemathesis/refs/heads/main/vocabulary/schemathesis-vocabulary.yml
- type: Examples
  url: https://raw.githubusercontent.com/api-evangelist/schemathesis/refs/heads/main/examples/schemathesis-cli-test-example.json
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com