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Api security posture assessment

As explained in Secure APIs

An API security audit is a systematic examination of an organization’s API security controls, practices, and risk posture.

An API security posture assessment systematically evaluates how well an organization can prevent, identify, respond to, and recover from API threats. It should begin before a breach, investment review, or regulatory audit. section 2.1

Use the assessment to check whether these areas are mature and continuously maintained:

  • Data inventory and sensitive endpoints section 2.1
  • Exposed endpoints, API versions, and unknown attack surface section 2.1
  • Authentication, authorization, access controls, and secure implementation section 2.1
  • Security testing, risk analysis, incident detection, and response planning section 2.1

A practical maturity check

Ask whether the attack surface is completely mapped and current, whether controls are continuously updated, and whether malicious activity can be detected automatically. Record mature or not mature, then address gaps such as undocumented APIs or technical debt. section 2.1 section 2.7

Table 2.1 API security posture evaluation questionnaire1
Mature
Not mature
Data inventory
Is your data inventory up to date and continuously updated?
Yes
No
Attack surface
Is your attack surface completely mapped and always up to date?
Yes
No
Authentication and authorization
Do you follow best practices and standards for authentication and authorization?
Yes
No
Access controls
Do you have secure and strict access controls, and are they continuously updated?
Yes
No
Secure implementation
Do you use secure design and implementation patterns?
Yes
No
Security testing
Do you continuously test your APIs for security?
Yes
No
Risk analysis
Have you mapped out your API business risks, and are they continuously updated?
Yes
No
Incident detection
Do you have proper API observability and automated detection of malicious activity?
Yes
No
Incident response plan
Do you have a detailed response plan for security breaches, and is it continuously updated?
Yes
No
Training and awareness
Do you continuously train your staff on API security?
Yes
No
1Answer yes only when you’re 100% into a category. If you’ve mapped 95% of your attack surface, for example, that’s still no, and if your data inventory is updated regularly but not continuously on every change, that’s still no.

Use the API security posture evaluation questionnaire as a compact checklist for comparing maturity across control areas. section 2.1

How Secure APIs covers it

How deep it goes
Breaks assessment into control categories and maturity questions, but stops short of prescribing detailed implementation steps.
Examples
Uses a maturity questionnaire covering mapped attack surfaces, updated controls, continuous testing, detection, and response planning.
What you can do after
Evaluate API security maturity, identify technical debt, and prioritize foundational improvements such as attack-surface mapping and standard authentication.
How it connects
Connects data inventory, attack surface, authentication and authorization, access controls, security testing, risk analysis, and incident response.

Related concepts

This explainer was generated by Manning's knowledge graph from the text of Secure APIs. The section links point to the parts of the book it draws on.