
vlayer is a cryptographic protocol that connects the offchain web with onchain trust. It transforms private data from web, email, and on-chain sources into verifiable proofs using Zero Knowledge Proofs (ZKPs) and Multi-Party Computation (MPC). Developers can securely verify and integrate data into Ethereum smart contracts without exposing sensitive information, powering applications in identity, reputation, finance, and data verification.
vouch, built on vlayer, uses Web Proofs (zkTLS) to verify user-owned data directly from trusted online platforms without ever accessing or storing sensitive information. Users generate cryptographic attestations locally on their devices through the vouch Chrome extension or mobile app (iOS and Android), ensuring every verification is private, tamper-proof, and transparent.
Build with vlayer to create applications that bring real-world data on-chain - privately, securely, and verifiably.
Build the next generation of privacy-preserving applications using vlayerâs ZK Prover Server - a REST API that compresses Web Proofs into zero-knowledge proofs (ZKPs). Prove the validity of real-world web data without revealing its contents. Think: privacy-preserving verification for the internet đ
đĄ Example Use Cases:
This application has it all - a great idea and a best-in-class implementation. To qualify, the project must use vlayerâs Web Prover Server (POST /compress-web-proof and POST /verify-zk-proof), and incorporate both Prover and Verifier smart contracts. Developers must also provide proof of RISC Zero contract deployment.
Build something awesome using vlayerâs Web Prover Server - a REST API for generating and verifying cryptographic web proofs with the TLSNotary (TLSN) protocol. With just a few lines of code, you can prove that data came from any public endpoint or OAuth call (like Reddit, GitHub, Twitter, or an exchange API) - without exposing your private information. Turn any HTTPS response into a trustless proof verifiable by anyone đ€Ż
đĄ Example Use Cases:
The application must generate Web Proofs using vlayerâs Web Prover Server for server-side proof generation and verification (POST /prove and POST /verify).
vouch enables applications to verify user-owned data from internet platforms without accessing or storing sensitive information. Using vouchâs existing data sources - or a new one you create - integrate vouch Web Proofs into your application to unlock privacy-preserving credentials and verification.
đĄ Example Use Cases:
The application must use vlayerâs client-side proving service (vouch) to generate Web Proofs. Developers may use existing data sources or create new ones.
Push the boundaries of what vouch can do by creating a brand new data source for the vouch catalog. This track rewards builders who go beyond integration - extending the protocol itself with new verified data types, APIs, or attestation logic that others can reuse across the ecosystem.
đĄ Example Use Cases:
Must create a new vouch data source in the vouch catalog that demonstrates a new use case and/or improves the protocol.