API Security Standards & Frameworks: A Complete Guide

APIs connect applications, cloud platforms, SaaS services, users, partners and machine identities. As these connections expand, organizations need more than individual technical controls such as authentication, encryption or rate limiting. They also need consistent requirements for how APIs are discovered, developed, tested, monitored, governed and retired.

That is where API security standards and frameworks become important.

Different frameworks address different parts of the problem. The OWASP API Security Project focuses on API-specific security risks. NIST provides detailed guidance for API protection and Zero Trust architecture. ISO/IEC 27001 provides requirements for an information security management system, while PCI DSS establishes technical and operational security requirements for environments involving payment account data.

These frameworks should not be treated as interchangeable. A mature API security program uses the guidance relevant to its risks, architecture, regulatory obligations and business environment.

Just as importantly, organizations must govern the identities and permissions behind API access.

This guide explains the major API security standards, API security frameworks, governance requirements and practical controls organizations can use to build a structured security program.

What Are API Security Standards and Frameworks?

API security standards and frameworks are structured requirements, principles and guidance organizations use to define, implement, assess and improve controls protecting APIs, data and the identities that access them.

The terms standard, framework and guidance are often used together, but they are not identical.

API Security Standards

A security standard establishes defined requirements or expectations that an organization can adopt or, in some cases, may be required to follow.

ISO describes standards as internationally agreed specifications or approaches created by experts, while ISO/IEC 27001 defines requirements that an information security management system must meet.

PCI DSS is another example. It provides baseline technical and operational requirements specifically intended to protect payment account data.

API Security Frameworks

An API security framework provides an organized way to structure security activities, risks, controls and responsibilities.

Frameworks help organizations answer questions such as:

• What should be protected?
• What risks need to be considered?
• Which controls should be implemented?
• Who is accountable?
• How should security effectiveness be assessed?
• How should the program improve over time?

A framework may incorporate requirements from several standards or guidance documents.

API Security Guidance

Security guidance provides recommended practices without necessarily creating a certification or compliance requirement.

The OWASP API Security Top 10, for example, is an awareness resource focused on important API-specific security risks. NIST SP 800-228 provides guidelines for API protection in cloud-native systems, including risk analysis and recommended controls across pre-runtime and runtime stages.

Organizations often use standards, frameworks and guidance together.

Why Do API Security Standards Matter?

API security becomes difficult to manage when every development team makes security decisions independently.

One application may enforce strong authorization while another relies on broad roles. One API may undergo regular testing while another is deployed without a defined assessment process. Machine credentials may be rotated in one environment but remain active indefinitely elsewhere.

Security standards help reduce that inconsistency.

A structured API security framework can establish common expectations around:

• API discovery
• Authentication
• Authorization
• Encryption
• Secure development
• Security testing
• Monitoring
• Identity and access governance
• Incident handling
• API retirement

Standards also improve accountability.

If every critical API must have an owner, teams know who is responsible for remediation. If access must be reviewed periodically, organizations can determine whether excessive permissions remain active. If testing evidence must be retained, security assessments become easier to audit.

ISO/IEC 27001 emphasizes establishing, implementing, maintaining and continually improving an information security management system rather than treating security as a one-time technical exercise.

NIST SP 800-228 similarly takes a lifecycle-oriented approach, addressing API risks and recommended protection controls during both development and runtime stages.

The important principle is:

API security requirements create value only when they become operational controls, responsibilities and repeatable processes.

Documentation alone does not secure an API.

Major API Security Standards and Frameworks

Four sources are particularly useful when developing an enterprise API security program:

• OWASP API Security
• NIST
• ISO/IEC 27001
• PCI DSS

They serve different purposes.

Framework or Standard	Primary Purpose	API Relevance	Technical Focus	Governance Focus	Best Use Case
OWASP API Security	API-specific risk awareness	High	High	Moderate	API design, testing and risk assessment
NIST	Cybersecurity architecture and controls	High	High	High	Enterprise and cloud security
ISO/IEC 27001	Information security management	Indirect but important	Moderate	Very high	Organization-wide governance
PCI DSS	Payment account data security	Scope-dependent	High	High	APIs within payment-data environments

The comparison is conceptual rather than an official mapping between the frameworks.

Each can contribute a different layer to API security.

OWASP API Security

The OWASP API Security Project focuses specifically on security risks affecting APIs and maintains the API Security Top 10. The current published API-specific edition remains the 2023 list.

OWASP is particularly useful for understanding where API implementations commonly fail.

Authorization Risks

Several OWASP API risks concern authorization:

• API1: Broken Object Level Authorization
• API3: Broken Object Property Level Authorization
• API5: Broken Function Level Authorization

Together, these risks show why authenticated users should not automatically receive broad access to objects, properties or privileged functions.

Authentication Risks

API2: Broken Authentication focuses on weaknesses that can allow attackers to compromise authentication mechanisms or impersonate legitimate identities.

Authentication therefore needs secure credential handling, token validation, resistance to automated attacks and appropriate protection for both human and machine identities.

Resource and Business Logic Risks

API4: Unrestricted Resource Consumption focuses on excessive use of resources, while API6: Unrestricted Access to Sensitive Business Flows addresses harmful automation or misuse of legitimate business functionality.

These categories are particularly relevant to runtime security, rate limiting and behavioral monitoring.

Infrastructure and Ecosystem Risks

The remaining categories broaden the security model:

• SSRF
• Security misconfiguration
• Improper inventory management
• Unsafe consumption of third-party APIs

These risks reinforce that API security depends on infrastructure, visibility and external trust relationships as well as application code.

When OWASP Should Be Used

OWASP API Security guidance is particularly useful during:

• API design
• Threat modeling
• Development
• Security testing
• Penetration testing
• Risk assessment
• Developer education
• Security-review planning

It should be used as a risk-awareness and security-testing foundation rather than treated as a certification standard.

For a detailed risk-by-risk breakdown, see [Internal Link: OWASP API Security].

NIST API Security Guidance

NIST provides more formal technical guidance for protecting APIs, particularly in cloud-native environments.

NIST SP 800-228 and API Protection

NIST SP 800-228, Guidelines for API Protection for Cloud-Native Systems, was originally published in June 2025 and received an update in March 2026 adding appendices covering API risk categories and recommended security controls by API lifecycle stage.

The publication addresses three broad areas:

• Identification and analysis of API risks
• Recommended controls during pre-runtime and runtime stages
• Evaluation of implementation options for those controls

NIST describes the approach as incremental and risk-based.

This makes SP 800-228 highly relevant to organizations designing formal API security requirements for cloud-native systems.

NIST Zero Trust and APIs

NIST SP 800-207 defines Zero Trust Architecture around moving security away from implicit trust based on static network boundaries and toward users, assets and resources.

Applied to API security, that creates a useful relationship:

Identity → Authentication → Authorization → Resource → Policy

A request should not be trusted simply because it originates from an internal network.

Instead, organizations should evaluate the identity, resource, policy and context surrounding the request.

NIST’s later cloud-native access-control work further emphasizes removing implicit trust based solely on network location, affiliation or ownership.

When NIST Is Useful

NIST guidance is particularly valuable for:

• Enterprise API security architecture
• Cloud-native environments
• Zero Trust programs
• Runtime API protection
• Formal access-control architecture
• Risk-based security design
• Large distributed systems

Organizations can use NIST alongside OWASP: OWASP highlights common API risk categories, while NIST provides deeper architectural and control-oriented guidance.

ISO 27001 and API Security

ISO/IEC 27001 is not an API-specific security standard.

It defines requirements for establishing, implementing, maintaining and continually improving an Information Security Management System (ISMS).

That distinction is important.

ISO 27001 will not tell development teams how to fix BOLA or how to configure an API gateway. Instead, it provides a management system within which API risks can be identified, controlled, governed and reviewed.

API Assets and Risk Management

APIs should be considered within the organization’s wider information-security risk-management processes.

Relevant questions include:

• Which APIs support critical processes?
• Which handle sensitive information?
• Which APIs have high external exposure?
• Which systems depend on them?
• Who owns the associated risk?

API discovery and inventory therefore support broader asset and risk governance.

API Access Control

Organizations need consistent rules governing who can access systems and information.

For APIs, that means connecting technical authorization with:

• User access
• Application access
• Machine identities
• Privileged roles
• Least privilege
• Access lifecycle processes

Secure Development

API security requirements should be integrated into design and development rather than added only after deployment.

This can include secure architecture, authorization design, testing and remediation processes.

Logging and Monitoring

API security events should be monitored according to organizational risk.

Relevant events can include authentication failures, authorization failures, privileged actions and abnormal resource access.

Supplier and Third-Party Security

APIs frequently connect organizations to vendors and SaaS services.

Third-party API dependencies should therefore be incorporated into supplier and information-security risk processes.

Evidence and Continuous Improvement

ISO/IEC 27001 emphasizes ongoing improvement of the ISMS.

For API security, this means policies, testing evidence, incidents, access reviews and audit findings should feed back into better controls rather than becoming static compliance artifacts.

PCI DSS and API Security

PCI DSS becomes relevant to APIs when those APIs are within, connected to, or affect the security of an environment involving payment account data.

PCI DSS was developed to enhance payment account data security and provides baseline technical and operational requirements for protecting that information.

The current active standard is PCI DSS v4.0.1. PCI SSC stated that PCI DSS v4.0 retired on December 31, 2024, after which v4.0.1 became the only active supported version.

API Access to Payment Data

Organizations should first establish scope.

An API that processes payment information, retrieves cardholder data or connects systems within the cardholder data environment may require controls aligned with applicable PCI DSS requirements.

Authentication and Access Controls

Access to payment-related systems should be restricted according to legitimate business need.

API identities, administrative users and machine accounts should receive only appropriate access.

Encryption and Data Protection

Payment information transmitted through APIs needs appropriate protection based on PCI scope and data-handling requirements.

Testing and Vulnerability Management

APIs within scope should be incorporated into relevant vulnerability-management and security-testing processes.

Monitoring and Evidence

Security activities need supporting evidence.

Logs, vulnerability results, access records and remediation evidence may all be relevant depending on PCI DSS scope and assessment requirements.

PCI DSS should not be applied indiscriminately to every API. Applicability depends on how the API relates to payment account data and the organization’s assessed scope.

OWASP vs NIST vs ISO 27001 vs PCI DSS

The frameworks complement one another because they answer different questions.

Area	OWASP	NIST	ISO/IEC 27001	PCI DSS
Main purpose	API risk awareness	Cybersecurity guidance	ISMS governance	Payment-data security
API-specific	High	High/increasing	Indirect	Context-dependent
Technical focus	High	High	Moderate	High
Governance focus	Moderate	High	Very high	High
Certification	No	No	Certification possible through accredited bodies	Compliance validation
Best use	API risk and testing	Architecture and controls	Governance	Payment environments

OWASP’s current API project focuses directly on API weaknesses, NIST SP 800-228 focuses specifically on cloud-native API protection, ISO 27001 defines ISMS requirements, and PCI DSS defines payment-account-data security requirements.

The important takeaway is:

Organizations do not necessarily need to choose one framework. They need to understand which frameworks apply and how their requirements reinforce one another.

How to Define API Security Requirements

Standards become operational only when organizations translate them into explicit API requirements.

API Inventory Requirements

Define requirements for:

• API discovery
• Inventory ownership
• Version tracking
• Environment classification
• Sensitive-data identification
• Deprecated API retirement

Authentication Requirements

Specify:

• Which endpoints require authentication
• Approved authentication mechanisms
• Token validation
• Credential lifecycle expectations
• Machine authentication requirements
• Higher assurance for privileged functions

Authorization Requirements

Define controls for:

• Object-level access
• Property-level access
• Function-level access
• Privileged operations
• Least privilege
• Role and entitlement boundaries

Data Protection Requirements

Establish expectations around:

• TLS
• Sensitive-data minimization
• Data classification
• Logging
• Error handling
• Secrets management

API Testing Requirements

Define:

• Testing frequency
• Authorization testing
• Vulnerability scanning
• Penetration testing
• Remediation timelines
• Retesting after fixes

Monitoring Requirements

Specify which API security events must be:

• Logged
• Monitored
• Alerted
• Investigated
• Retained

API Lifecycle Requirements

Security responsibilities should apply across:

Design → Development → Testing → Deployment → Operation → Deprecation → Retirement

Access Governance Requirements

Define how API-related access is:

• Requested
• Approved
• Reviewed
• Certified
• Remediated
• Removed

This is where technical API security connects directly to identity governance.

How to Build an API Security Framework

A practical API security framework can follow:

Discover → Classify → Control → Test → Monitor → Govern → Improve

Discover and Inventory APIs

Identify known, unknown, public, internal and legacy APIs.

Classify API Risk

Classify APIs based on:

• External exposure
• Sensitive data
• Business criticality
• Privileged functionality
• Regulatory relevance

Define Security Requirements

Translate the selected standards and risk profile into clear technical and operational requirements.

Establish Identity and Access Policies

Define who and what can access:

• APIs
• Applications
• Sensitive resources
• Privileged functionality

Include human and machine identities.

Integrate Security Testing

Test authentication, authorization, configuration and business logic throughout development.

Establish Runtime Monitoring

Monitor APIs for misuse, abnormal activity and security events after deployment.

Define Remediation Processes

Set ownership and expected response for vulnerabilities, excessive permissions and policy exceptions.

Review Access and Controls

Periodically verify whether users, applications and service accounts still require their existing permissions.

Measure and Improve

Use:

• Security findings
• Access-review results
• Incidents
• Audit evidence
• Control failures

to improve the program continuously.

What Is API Security Governance?

API security governance is the system of ownership, policies, risk decisions, access controls, oversight and lifecycle processes used to ensure APIs are secured consistently across an organization.

Technical controls answer how an API is protected.

Governance answers who is responsible and how security decisions are maintained over time.

API Ownership

Every critical API should have a clear owner responsible for:

• Security decisions
• Risk acceptance
• Remediation
• Lifecycle decisions

Security Policies

Policies should establish minimum API security requirements.

Risk Classification

Higher-risk APIs may require stronger:

• Authentication
• Monitoring
• Testing
• Approval
• Access governance

Exception Management

When teams cannot meet a security requirement, exceptions should be:

• Documented
• Risk-assessed
• Approved
• Time-limited where appropriate
• Revisited

Access Governance

Organizations need visibility into:

• Who has access
• What permissions they have
• Why they need them
• Whether access remains appropriate

API Lifecycle Governance

Governance should follow an API from creation through retirement.

The fundamental questions are:

Who owns the API? Who can access it? What can they do? How is that access reviewed? When is it removed?

Building an API Governance Framework

A practical API governance framework should cover multiple operational areas.

Ownership

Assign business and technical responsibility.

Security Standards

Define mandatory API security requirements.

Risk Classification

Establish a consistent method for determining API criticality.

Identity and Access

Govern both human and non-human access.

Secure Development

Embed API security requirements into engineering workflows.

Operations and Monitoring

Establish security visibility after deployment.

Compliance

Map applicable requirements to the organization’s API environment.

Lifecycle Management

Define processes for:

• Versioning
• Deprecation
• Retirement

Metrics

Useful measures can include:

• Percentage of APIs with owners
• Percentage of APIs inventoried
• Outstanding critical vulnerabilities
• Deprecated APIs still active
• Overdue access reviews
• Excessive entitlements awaiting remediation

Metrics should show control effectiveness, not merely activity volume.

API Security Compliance: From Framework to Evidence

Security and compliance are related but different.

Security asks whether risk is effectively controlled.

Compliance asks whether required controls can be demonstrated against an applicable obligation or framework.

A compliant control can still be weak in practice if it is implemented poorly. Conversely, a strong security practice may not satisfy a specific compliance requirement if the necessary evidence is missing.

What Evidence Should Organizations Maintain?

Depending on applicable requirements, useful evidence can include:

• API inventory
• Ownership records
• Risk assessments
• Access policies
• Authentication requirements
• Authorization design
• Security assessments
• Vulnerability reports
• Remediation records
• Testing results
• Monitoring evidence
• Access-review records
• Access certifications
• Exceptions and approvals
• Retirement records

SecurEnds’ user-access-review capabilities support recurring review and certification processes and are designed to provide visibility into who has access to systems and applications.

Why Continuous Compliance Matters

API environments do not remain static.

New endpoints appear. Users change roles. Service accounts accumulate permissions. Third-party integrations change. Old API versions remain online.

As a result, evidence and controls need continuous reassessment.

For a deeper framework, see [Internal Link: API Security Compliance].

API Security Controls Across Major Frameworks

The following table is a conceptual comparison only. It is not an official compliance mapping or control crosswalk issued by OWASP, NIST, ISO or PCI SSC.

API Security Control	OWASP	NIST	ISO 27001	PCI DSS
API inventory	Strong relevance	Strong relevance	Asset/risk governance	Scope-dependent
Authentication	Strong relevance	Strong relevance	Access-control governance	Strong relevance
Authorization	Strong relevance	Strong relevance	Access governance	Strong relevance
Encryption	Relevant	Strong relevance	Information protection	Strong relevance
Secure configuration	Strong relevance	Strong relevance	Governance/control management	Strong relevance
Security testing	Strong relevance	Strong relevance	Risk/control assurance	Strong relevance
Logging and monitoring	Relevant	Strong relevance	Security operations	Strong relevance
Access governance	Indirect/supporting	Strong relevance	Strong relevance	Strong relevance
Third-party risk	API10 relevance	Supply-chain/risk context	Supplier governance	Scope-dependent
Lifecycle management	API9 relevance	Strong relevance	Governance	Relevant

OWASP focuses most directly on API-specific vulnerability patterns, NIST provides lifecycle-oriented API protection guidance, ISO 27001 structures organization-wide information-security management, and PCI DSS applies technical and operational controls to payment environments.

API Identity and Access Governance

API security often asks:

Should this API request be allowed?

Identity governance asks a broader question:

Should the identity have the access that makes the request possible in the first place?

The relationship can be represented as:

Identity → Role → Entitlement → API Authorization → Resource

This distinction becomes increasingly important as APIs are used by human and non-human identities.

User Access

Employees and contractors can accumulate application access as roles change.

Permissions that were once legitimate may become stale.

Application Access

Applications can receive long-lived permissions to connected systems.

Those permissions should have ownership and a valid business purpose.

Service Accounts

Service accounts frequently operate continuously and can retain privileged access for years.

Machine Identities

Modern environments also include:

• Workloads
• Bots
• Automation
• Application identities
• AI agents

SecurEnds currently positions its platform around governance across human, non-human and AI identities.

Privileged Access

Highly privileged access requires stronger oversight because compromise can create disproportionate impact.

Entitlement Visibility

Teams need to understand what each identity can access.

SecurEnds’ Identity MindMap provides a user-centric view across associated accounts, applications and permissions.

Access Certification

Periodic certification helps organizations determine whether existing access remains appropriate.

Least Privilege

Access should reflect current business requirements rather than historical accumulation.

Access Remediation

When reviews identify unnecessary access, permissions should be removed or adjusted.

The central relationship is:

API authorization controls what a request can do. Identity governance controls whether the identity should continue to possess the permissions behind that request.

API Security Standards Checklist

Use this checklist when translating standards into operational controls.

Governance

• API owners are assigned.
• APIs are risk-classified.
• Security policies are documented.
• Policy exceptions are approved and tracked.
• API responsibilities are clearly assigned.

Identity

• Protected APIs require appropriate authentication.
• Authorization is enforced.
• Least privilege is applied.
• Privileged access is controlled.
• User access is periodically reviewed.
• Machine-identity access is governed.

Protection

• API traffic is appropriately encrypted.
• Secure configurations are defined.
• Inputs are validated.
• Resource controls are implemented.
• Secrets are protected.

Testing

• APIs receive security testing.
• OWASP API risks are considered.
• Authorization is specifically tested.
• Vulnerabilities are prioritized.
• Remediation is tracked.
• Fixes are retested.

Operations

• Authentication activity is logged.
• Authorization failures are visible.
• Security-relevant API activity is monitored.
• Incident-response responsibilities are defined.

Lifecycle

• API inventory is current.
• Versions are tracked.
• Deprecated APIs are identified.
• Retirement is formally completed.
• Associated credentials are removed.

Compliance

• Applicable frameworks are identified.
• Required evidence is maintained.
• Security controls are periodically reviewed.
• Access-review evidence is retained.
• Exceptions and remediation are documented.

Common API Security Framework Mistakes

Framework adoption can create false confidence when organizations focus on documentation rather than actual security outcomes.

Treating OWASP as a Compliance Standard

The OWASP API Security Top 10 is an awareness and risk resource, not a certification program.

Use it to improve API design, testing and risk assessment rather than claiming “OWASP compliance” without defining what that means.

Assuming ISO 27001 Automatically Secures APIs

ISO/IEC 27001 establishes ISMS requirements.

Certification does not automatically prove that every API implements secure object-level authorization or correct rate limits.

API-specific controls still need to be designed and tested.

Applying PCI DSS Without Considering Scope

PCI DSS protects payment account data.

Organizations should determine whether an API is actually in or affects the relevant payment environment before applying PCI requirements.

Creating Policies Without Enforcement

A policy stating that every API must use least privilege creates little value if nobody verifies permissions.

Focusing Only on Technical Controls

Authentication, encryption and scanning do not address ownership, review, accountability or stale access by themselves.

Ignoring Identity and Entitlements

A technically valid API request can still be risky if the identity has excessive access.

Treating Compliance as a One-Time Exercise

APIs, permissions and integrations change continuously.

Compliance evidence can therefore become stale.

Ignoring Machine Identities

Service accounts and other non-human identities can hold extensive application access even though no employee signs in through them interactively.

How Identity Governance Strengthens API Security Governance

Security frameworks commonly require or support principles around:

• Access control
• Accountability
• Least privilege
• Periodic review
• Access removal
• Lifecycle management
• Evidence

Identity governance helps operationalize these requirements.

Understand Who Has Access

Teams need visibility across users, applications and non-human identities.

Identify Excessive Entitlements

Access can accumulate through role changes, temporary projects and integrations.

Identity governance helps identify permissions that no longer align with current need.

Review and Certify Access

Periodic certification enables managers, application owners and other reviewers to determine whether access remains appropriate.

SecurEnds describes user access reviews as a structured recurring process for verifying that users retain the minimum necessary access based on their current role.

Remove Unnecessary Access

The value of access review depends on remediation.

Permissions that are no longer justified should be revoked or adjusted.

Govern Privileged Access

Administrative permissions require stronger oversight and clear ownership.

SecurEnds’ Application Access Request capability includes workflows for privileged access and emphasizes least-privilege provisioning.

Manage Identity Lifecycle

Access should change when users, applications or machine identities change purpose or leave the environment.

Maintain Evidence

Review results, approvals and access changes provide useful governance and audit evidence.

The core principle is:

API security controls determine whether an API request should be allowed. Identity governance helps ensure the identities behind those requests have appropriate access in the first place.

How SecurEnds Supports API Access Governance

SecurEnds supports the identity and access-governance layer that complements technical API security controls.

Its platform currently focuses on governing human, non-human and AI identities, including automated user access reviews and least-privilege initiatives.

Relevant capabilities include:

• User access reviews
• Access certification
• Entitlement visibility
• Identity analytics
• Application access workflows
• Least-privilege access
• Access remediation
• Identity lifecycle governance
• Non-human identity governance

SecurEnds’ Identity MindMap provides visibility into users, applications and associated permissions, while its application-access workflows track requests, approvals and access changes.

Its access-review capabilities also support recurring reviews designed to verify whether access remains appropriate.

The relationship is straightforward:

API security technology + identity governance = stronger control over both API activity and the identities behind that access.

[Internal Link: SecurEnds Identity Governance]
[Internal Link: SecurEnds User Access Reviews]
[Internal Link: SecurEnds Non-Human Identity Management]

How to Build a Standards-Aligned API Security Program

A practical standards-aligned program can follow:

Scope → Assess → Define → Implement → Verify → Govern → Improve

Step 1 — Identify Applicable Standards

Determine which guidance and requirements apply.

This may include:

• OWASP API Security
• NIST
• ISO/IEC 27001
• PCI DSS
• Other industry or regulatory obligations

Step 2 — Discover and Classify APIs

Identify APIs and classify them according to:

• Exposure
• Data sensitivity
• Business importance
• Regulatory scope
• Ownership

Step 3 — Assess API Risks

Evaluate:

• Authentication
• Authorization
• Resource controls
• Configuration
• Business logic
• Third-party dependencies
• Identity access

Step 4 — Translate Standards Into Requirements

Turn high-level guidance into measurable controls.

For example:

“Apply least privilege” becomes:

• Define permitted roles
• Review entitlements periodically
• Remove unnecessary privileges
• Record exceptions

Step 5 — Implement Security Controls

Deploy the required:

• Authentication
• Authorization
• Encryption
• Input validation
• Testing
• Monitoring
• Runtime protections

Step 6 — Establish Access Governance

Govern:

• Users
• Applications
• Service accounts
• Machine identities
• Privileged access

Step 7 — Collect Evidence

Maintain evidence demonstrating:

• Control implementation
• Security testing
• Access review
• Remediation
• Monitoring
• Exception management

Step 8 — Continuously Monitor and Reassess

Reevaluate controls as:

• APIs change
• Identities change
• Permissions change
• Integrations change
• Standards evolve

A standards-aligned program should become an operating model, not a documentation project.

Build API Security Around the Right Combination of Frameworks

No single security framework completely solves API security.

A mature organization can use each source for what it does best:

OWASP → Understand API-specific risks.

NIST → Design security architecture and protection controls.

ISO/IEC 27001 → Govern information security through an ISMS.

PCI DSS → Protect payment account data where APIs fall within applicable scope.

The stronger approach is to translate these sources into real API requirements covering discovery, authentication, authorization, data protection, testing, monitoring, lifecycle management and governance.

Strong API security also requires visibility and control over the identities behind API access.

A secure endpoint can still create risk when users, applications or service accounts retain permissions they no longer need.

Protect the API, govern the identity, review the entitlement and continuously verify the control.

For broader API security fundamentals, see the [Internal Link: Complete API Security Guide].

Frequently Asked Questions

What are API security standards?

API security standards are structured requirements or security expectations organizations use to protect APIs, data and access consistently.

Depending on the environment, organizations may draw requirements from API-specific guidance such as OWASP, technical guidance such as NIST, management-system standards such as ISO/IEC 27001 or sector-specific requirements such as PCI DSS.

Which security frameworks apply to APIs?

Several frameworks can apply depending on context.

OWASP API Security provides API-specific risk guidance. NIST SP 800-228 provides cloud-native API protection guidance. ISO/IEC 27001 provides an information-security management framework, while PCI DSS becomes relevant when APIs are within or affect payment-data environments.

Is OWASP API Security a standard?

The OWASP API Security Top 10 is primarily an awareness and risk-guidance resource, not a certification standard.

It helps developers, architects and security teams understand common API-specific security weaknesses and improve design and testing practices.

How does NIST apply to API security?

NIST SP 800-228 provides guidance specifically for protecting APIs in cloud-native systems.

It covers API risk identification and recommended controls during development and runtime, using an incremental risk-based approach. NIST Zero Trust guidance also supports resource-focused identity and access decisions rather than implicit trust based on network location.

Does ISO 27001 cover API security?

ISO/IEC 27001 is not an API-specific standard.

It establishes requirements for an information security management system, within which organizations can govern API assets, access controls, development practices, monitoring, supplier risk and continual security improvement.

Does PCI DSS apply to APIs?

PCI DSS may apply when APIs store, process, transmit or affect the security of payment account data within the organization’s assessed PCI scope.

It should not automatically be assumed to apply to every API. PCI DSS v4.0.1 is the current active version supported by PCI SSC.

What is an API security governance framework?

An API security governance framework defines ownership, policies, risk classification, access requirements, security responsibilities, lifecycle controls and oversight for APIs across an organization.

It connects technical API controls with accountability, evidence, identity governance and continuous improvement.

How does identity governance support API security?

Identity governance helps organizations understand who has access, what entitlements they hold, why access exists and whether it should continue.

Capabilities such as access reviews, certification, entitlement visibility, lifecycle management and remediation support least privilege and reduce stale or excessive permissions behind API access. SecurEnds currently provides these capabilities across human and non-human identities.