Industry Guide Updated: August 2026

Does the Cyber Resilience Act Apply to APIs?

Learn if the EU CRA applies to APIs, what the core compliance requirements are, and how to start preparing your engineering teams automatically.

Core Definition

It Depends. Software you supply to customers (downloaded, installed, on-premise or as a mobile/desktop client) is a product with digital elements (Article 3(1)), together with the remote data processing it needs to perform its functions (Article 3(2)). A service provided only as hosted software (SaaS) is not in scope on its own: Recital 12 notes that Directive (EU) 2022/2555 (NIS2) applies to cloud services such as SaaS. An SDK or client library you distribute for your API is in scope; the API itself, operated as a hosted service, falls within the CRA only where it is the remote data processing solution of a product you place on the market. Confirm which parts of your offering are placed on the EU market as products, and whether a sector-specific exclusion applies, before assuming the CRA's requirements do or do not apply.

Key Compliance Steps for APIs

  1. Determine Classification: Check if your APIs falls under the default category, an important class (Annex III, class I or II) or the critical list (Annex IV), which dictate stricter conformity assessment paths.
  2. Perform Risk Assessment: Map out the attack surface for your software and document the mitigations for the "secure by design" requirement.
  3. Implement Vulnerability Reporting: Provide a 24-hour reporting mechanism to ENISA for actively exploited vulnerabilities.
  4. Generate an SBOM: Ensure all dependencies used in your APIs are documented in a machine-readable Software Bill of Materials.
  5. Avoid the Common Pitfall: API security gets reduced to 'we use API keys' without addressing the access-control granularity and logging the CRA expects.

How This Plays Out in Practice

An SDK or client library you distribute for your API is in scope; the API itself, operated as a hosted service, falls within the CRA only where it is the remote data processing solution of a product you place on the market.

What to Watch For

API security gets reduced to 'we use API keys' without addressing the access-control granularity and logging the CRA expects.

Assess Your CRA Readiness

Evaluate your product's Cyber Resilience Act readiness using our interactive tool. Find exactly which of the 22 security requirements apply directly to APIs.

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