All your core functionality in one place.
Authenticate your users
Ensure every interaction comes from real users—no bots, no spoofing. Seamlessly connect wallet actions to real users and verify signing authority with confidence.
Sign messages
Prompt users to sign arbitrary messages, which can authorize an in-app action or prove they control a particular address.
Broadcast transactions
Enable your users to interact with smart contracts through your app. Handle key management, call contract functions, and construct transactions dynamically—right out of the box.
/** Stacks.js is the building block that we use all the time to build, broadcast, and sign our transactions. */
Build quickly, build securely.
Protect users with post conditions
Create post conditions, a unique safety feature of Stacks, that set requirements a transaction must meet in order to execute. Those requirements could be a minimum/maximum transfer amount from the sender, what the receiver will send back in return, and more.
Powerful wallet integrations with Stacks Connect
Avoid managing a centralized auth and enable personalized interactions like user rewards, without compromising on privacy and anonymity for your users. Build best in class web3 wallet integrations for your users with Stacks Connect.
An open source foundation
Stacks.js is an open source collection of libraries and is a free resource to enable you to ship more quickly. As with all things onchain, trust, but verify.