Learn Understand Overview How it works Use cases Why XChain Look things up FAQ Glossary Try it Get started The wallet The explorer

Developers For developers The SDK Example contracts Actions Components Testing White paper GitHub

Run

Platform Main site Wallet Explorer Documentation Encoder status Bootstraps & sync Validator hub MCP for agents

Outside-world data

ATTEST

Ask the web or an AI. Get the answer on-chain.

How it works Spec & fields

Live today onBitcoin·Litecoin·Dogecoin·more chains coming

ATTEST is how a contract reaches the outside world: it poses a question (an HTTPS fetch or an AI prompt), validators each answer independently, agree, and write the verified result on-chain.

What you can do with it

Settle prediction markets from official data sources.
Run AI-judged contests, content moderation, or sentiment-driven flows.
React automatically to real-world events: weather, sports, prices.

Often combined with: EXECUTE · DEPLOY · PRICE

← All actions