Webhooks for Web3
Smart contracts have always been silent. Vitruveo gives them a voice.
Web3 has been a one-way street. Transactions bring data in, smart contracts execute, but nothing goes back out. Web2 apps must index, poll, and react asynchronously. Vitruveo changes this. HOST (HTTP Outbound Service Trigger) lets contracts speak HTTP during transaction execution—calling your webhooks directly, signed by the validator, provably authentic. Web2 → Web3 → Web2. Complete.
The Silent Problem
Web2 runs on webhooks—Stripe, Shopify, Slack, GitHub. All Web3 offers is unreliable event logs. Execute. Wait. The silence is deafening. Result: low Web2 developer adoption.
The Voice
HOST gives smart contracts a voice. The first protocol-level outbound trigger in any EVM chain. Contract sends data to your webhook during transaction. Signed by the validator. Provably authentic.
Technology
EVM Compatible
Your Solidity skills transfer directly
Protocol Extensions
Capabilities built into the node, not bolted on
Decentralized Validators
No central authority for HOST requests
Xibit is actively leveraging Vitruveo's new Protocol Smart Contract capabilities to introduce powerful AI features into its platform. By integrating with HOST, Xibit will enable smart contracts to trigger AI-driven workflows—from intelligent art curation and recommendation engines to automated licensing and royalty distribution powered by on-chain logic and off-chain intelligence.
Real-World Scenarios
Concrete examples of what Protocol Smart Contracts enable
HOSTDAO → AI Agent Execution
Governance vote passes, HOST triggers Claude to analyze treasury and execute approved rebalancing strategy.
HOSTNFT → Physical Fulfillment
Collector buys art NFT, HOST calls Shopify API with shipping address, physical print ships automatically.
HOSTPayment → Smart Lock Access
Rental deposit confirmed on-chain, HOST triggers August API, guest's phone can unlock the door.
PasskeyFace ID Transaction Signing
User approves swap with fingerprint. No seed phrase, no extension popup—just biometric confirmation via WebAuthn.
RNGProvably Fair Loot Drops
Player defeats boss, RNG determines drop rarity. Result is verifiable on-chain—no rigged odds, no trust required.
RNGOn-Chain Raffle Selection
10,000 entries, one winner. RNG picks index 7,429. Anyone can verify the selection was random and untampered.
CompoundInterestPrecise DeFi Yield Calculation
Staking contract calculates exact APY to 18 decimals. No rounding errors, no approximations—mathematically correct interest.
MerkleProofGas-Efficient Airdrop Claims
50,000 eligible addresses, but only a 32-byte root stored on-chain. Users prove eligibility with their Merkle path.
MerkleProofNFT Mint Whitelist
Exclusive mint for 2,000 early supporters. Contract verifies membership in one cheap operation instead of checking a massive list.
Featured Apps
Pretrend: Prediction marketplace for trends
Coming Soon
AppVinci: Multi-application hub for Vitruveo
Coming SoonFrequently Asked Questions
What is Vitruveo?
Webhooks for Web3. The first EVM chain where smart contracts speak HTTP. Your contracts call webhooks directly during transaction execution—no indexers, no polling, no middleware.
How is it different from Ethereum?
100% EVM compatible—your Solidity works unchanged. The difference: HOST lets contracts talk back to Web2. Plus 11 other Protocol Smart Contracts for passkeys, randomness, and more.
What are Protocol Smart Contracts?
Precompiled contracts built into Vitruveo's node software. They provide capabilities too expensive or impossible in pure Solidity—like outbound HTTP calls.
What is HOST?
HTTP Outbound Service Trigger. Smart contracts that speak HTTP. Your contract sends data to your webhook during transaction. Signed by the validator. Provably authentic.
Is it secure?
Every outbound call is signed by the validator. Your webhook can verify it came from the blockchain. Chain of custody, extended off-chain.
What's the gas cost?
4 gwei base price with 5-second blocks. Fast enough for AI agent workflows. PSC operations range from 500 gas (RNG) to 200,000+ gas (IBC).