CHANGELOG · RELEASE NOTES

Changelog

Track every update to the Prynt platform. New features, improvements, bug fixes, and breaking changes — all in one place.

v4.1.0 February 10, 2026

NEW .NET Server SDK (beta) — full support for C# and F# with async/await patterns, dependency injection, and NuGet packaging.

NEW Rule Backtesting via API — test rules against historical data before deploying to production. Available at POST /v1/rules/{id}/backtest.

IMPROVED Reduced P99 latency from 180ms to 142ms across all regions through optimized signal collection and edge caching.

IMPROVED Enhanced bot detection for headless Chrome v120+ with new canvas and WebGL fingerprinting heuristics.

FIX Fixed false positives in VPN detection for corporate networks using split-tunnel configurations.

v4.0.2 January 28, 2026

FIX Fixed webhook retry logic for 429 responses — retries now respect the Retry-After header with exponential backoff.

FIX Resolved race condition in visitor deduplication that could cause duplicate visitorId assignments under high concurrency.

IMPROVED Better error messages for invalid API keys — responses now include the key prefix and specific reason for rejection.

v4.0.1 January 15, 2026

FIX Fixed iOS SDK crash on iOS 16.x when Privacy Manifest validation triggered during background identification.

FIX Fixed React SDK hydration mismatch in SSR — useVisitor() hook now defers identification to client-side useEffect.

IMPROVED Updated Android SDK to target API 34 (Android 14) with updated permission handling and predictive back gesture support.

v4.0.0 January 5, 2026 MAJOR RELEASE

BREAKING Removed deprecated v3 identification endpoint (/v3/identify). All integrations must migrate to /v1/events. See migration guide.

BREAKING Minimum Node.js version now 18+. Dropped support for Node.js 14 and 16 which have reached end-of-life.

NEW Smart Signals v2 with 8 new signal types including developer tools detection, clipboard access, screen recording, and remote desktop.

NEW ML-powered risk scoring engine — real-time abuse, ATO, bot, and suspect scores powered by ensemble models trained on 12B+ identifications.

NEW Rules engine with real-time evaluation — create no-code fraud policies that return allow/challenge/block verdicts per identification.

NEW Lists API for managing blocklists and allowlists — add visitor IDs, IPs, or custom identifiers with TTL support.

IMPROVED 40% faster fingerprint generation through WebAssembly-accelerated signal collection and parallel processing.

IMPROVED New dashboard with real-time analytics, live event stream, and interactive rule builder with visual testing.

v3.8.0 December 12, 2025

NEW Flutter SDK (beta) — cross-platform device identification for iOS and Android with a single Dart package.

NEW React Native SDK — native module with JavaScript bridge for seamless integration with React Native 0.72+.

IMPROVED Enhanced canvas fingerprinting accuracy with new rendering pipeline that captures sub-pixel differences across GPU drivers.

FIX Fixed timezone mismatch in VPN detection that caused false positives for users traveling across time zones.

v3.7.2 November 28, 2025

FIX Fixed memory leak in JavaScript SDK caused by unreleased event listeners on single-page application route changes.

IMPROVED Reduced SDK bundle size by 18% (from 14.6KB to 12KB gzipped) through tree-shaking and removal of legacy polyfills.

IMPROVED Better handling of browser extensions that modify canvas and WebGL contexts — fingerprints now remain stable despite extensions.

v3.7.0 November 10, 2025

NEW Webhook signature verification — all webhook payloads now include an HMAC-SHA256 signature in the X-Prynt-Signature header.

NEW Sealed results for tamper-proof responses — encrypted identification results that can only be decrypted by your server.

IMPROVED Go SDK now supports context cancellation and deadline propagation for all API calls.

FIX Fixed Python SDK async session handling — aiohttp sessions are now properly closed on client disposal.

v3.6.0 October 20, 2025

NEW Velocity metrics for login and signup patterns — track logins_per_device_24h, signups_per_ip_1h, and 12 other velocity signals.

NEW Device age tracking — know when a device was first seen and how many days it has been active on your platform.

IMPROVED 25% accuracy improvement for incognito detection through new entropy analysis of storage API behavior.

FIX Fixed Ruby SDK connection pooling issue that caused Errno::EMFILE (too many open files) under sustained load.