The eBook explains that API specifications such as OpenAPI help teams document what endpoints exist and how they should behave, enabling faster adoption, testing, and security validation, but also creating risk if specs are published in predictable locations where attackers can find and weaponize them. It describes how reconnaissance tools can automatically discover spec files and endpoints, then shift from discovery to targeted exploitation by iterating parameters and extracting data, turning developer-oriented scanners into attacker tooling. It recommends best practices: publish a spec for internal use, store it securely (and generate a separate public version if needed), use the spec to audit for nonconforming transactions and new API drift, change default locations and settings that le

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