Streamlined Zero-Knowledge Proof Verification
Built for Developers
Kurier is a REST API built by Horizen Labs that makes zero-knowledge proof verification simple, fast, and affordable. Whether you're building a zk-dApp, a verifiable compute layer, or a privacy-preserving application, Kurier handles proof submission and on-chain verification so you don't have to run your own infrastructure.
Proofs are optimistically verified by Kurier and submitted on-chain to zkVerify or the Base network — a decentralized blockchain dedicated to ZK proof verification.
The Kurier API is available on both mainnet and testnet. Read our guide here.
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Why Kurier?
Secure
An immutable foundation for your zk-dApp. Proofs are submitted on-chain via zkVerify, providing a tamper-proof audit trail for every verification.
Fast
Optimistic verification delivers near-instant results, with on-chain finality available for applications requiring full cryptographic guarantees.
Simple
A single REST API endpoint replaces the need to run a zkVerify node, manage crypto payments, or write custom proof-submission logic.
Interoperable
Designed to support multiple zk-proof types on various blockchain networks. See the full list of supported networks.