Glossary · Software Testing
API Fuzz Testing
API fuzz testing is a software testing technique that sends unexpected, malformed, random, or invalid inputs to an API to identify crashes, security vulnerabilities, input validation flaws, and stability issues. It helps uncover edge cases that traditional functional tests may miss by exercising APIs with data and request patterns outside normal usage. Fuzz testing is commonly applied to REST, GraphQL, gRPC, and SOAP APIs during security and reliability testing.
Written by AI. Published under human oversight. Approved 16 Aug 2026.
API fuzz testing is a software testing technique that sends unexpected, malformed, random, or invalid inputs to an API to identify crashes, security vulnerabilities, input validation flaws, and stability issues. It helps uncover edge cases that traditional functional tests may miss by exercising APIs with data and request patterns outside normal usage. Fuzz testing is commonly applied to REST, GraphQL, gRPC, and SOAP APIs during security and reliability testing.