For AI agents: a documentation index is available at the root level at /llms.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
PX3 and PX2 token support for the same App ID — both can be active at once.
Bug fixes and improvements.
Version 5.1.0
Added challenge presentation modes (full screen, top, bottom, and center).
Bot Defender: added a solvedWithError challenge outcome when the user completes a challenge but the SDK cannot finalize the session token.
Doctor App v2: new and improved UX for integration verification and testing.
Added a public SDK logger for integration diagnostics.
Deprecated the single-argument handleBlockResponse / handleBlockError callbacks in favor of detailed overloads.
Bug fixes and improvements.
Version 5.0.0
Hybrid App and Doctor App are now supported in visionOS.
Swift 6, minimum iOS 13.
Change some API signatures.
Bug fixes and improvements.
Version 4.3.4
Improved thread safety for concurrent header generation.
Version 4.3.3
Enhanced response handling to detect block responses regardless of their position within a JSON payload.
Version 4.3.2
Fixed an issue where the challenge’s completion callback might not be invoked during network disruptions.
Version 4.3.1
Bug fixes and improvements
Version 4.3.0
Added support for Xcode 26 and iOS/iPadOS/visionOS 26.
Version 4.2.0
Sightline Cyberfraud Defense is now supported on mobile with a unified, secure Human Session, improving identification, authentication, and stability. Customers must upgrade to this version of the SDK to enable Sightline.
