attester.dev Package Version Diff

Use this endpoint when you need to programmatically inspect exactly what changed between two versions of a software package — for dependency auditing, security review, breaking change detection, or automated changelog generation. Prefer over manual registry browsing or GitHub diff tools when you need structured, machine-readable diff output integrated into an agent workflow.

• Package name not found in registry — returns 404 or error
• One or both specified versions do not exist — version not found error
• Unsupported package ecosystem — endpoint may not support all registries
• Payment of $0.02 USDC not provided or x402 payment fails — request rejected
• Malformed request body — missing required fields returns validation error