A powerful, simple, promise-based postMessage library
Iframe-side SDK for Sovereign Workspace third-party apps — call workspace IPC, notifications, system info, and fetch the scoped app token over a validated postMessage bridge.
Framework-agnostic JavaScript SDK for controlling Vectreal embedded 3D scene previews via postMessage.
A powerful, simple, promise-based postMessage library
a middleware based RPC library over postMessage can work with both web worker and iframe
Generic, type-safe RPC communication layer for bidirectional postMessage communication
JSON-RPC 2.0 client and server that communicate via postMessage
A small (dependency-free) library for 2-way iframe communication.
Switchboard is a library to make it easier to communicate across browser windows using the MessageChannel API
Keep same and cross domain iFrames sized to their content with support for window/content resizing, and multiple iFrames.
Tiny RPC over window.postMessage library
Framework-agnostic browser SDK for Verse8 rewarded and interstitial ads
React hooks and iframe transport for Civitai App Blocks. Pairs with @civitai/app-sdk/blocks.
postmate-plus
CRM SDK — embed third-party apps inside the CRM, or embed the CRM inside your own SaaS (proxy-free, signed-assertion or API-key auth)
Apps Platform host adapter + capability validator + sandbox shell. The iframe runtime shared across all 5 surfaces (Embed, Block, Account, Checkout, Admin).
MicroLocalStore is a lightweight, easy-to-use JavaScript library that provides a shared local storage solution across different origins. It creates an isolated local storage for each instance, allowing you to store and retrieve data seamlessly. It's perfe
A BroadcastChannel that works in New Browsers, Old Browsers, WebWorkers and NodeJs and iframes
LearnCard Partner Connect SDK - Promise-based cross-origin messaging for partner apps
SDK for Localé Mini-Apps - Bridge between Mini-Apps and the Localé Kernel
Type-safe RPC for Workers, threads, and beyond — zero deps, local-feel calls.
Angular security helpers for preventing ReDoS and other security vulnerabilities
Allows a page to communicate over postMessage with multiple iframes.
Spec-first TypeScript definition of the Mythwork host <-> inner-app postMessage protocol: envelope types, handshake constants, the full method map, the event map, and the pure data types they reference. Runtime code is constants only.