QDay
QDay is a post-quantum, EVM-compatible blockchain built for the agentic era. Combining NIST-standardized post-quantum cryptography with high-performance infrastructure, QDay delivers sub-second settlement at scale for decentralized applications, real-world payments, and agent-driven commerce. Natively integrated with the x402 standard, QDay is the foundational payment chain for a world where humans, applications, and autonomous agents transact together.
Visit QDay.ioKey Advantages
Post-Quantum Security
Built on NIST-standardized post-quantum cryptography, QDay is engineered to withstand the threats quantum computing poses to today's blockchain networks — securing assets and transactions for the long term.
Sub-Second Settlement, Built for Agents
QDay settles transactions in sub-second time at low cost, with native x402 support — making it fast and affordable enough for micropayments, machine-to-machine transactions, and high-frequency agentic commerce, not just traditional human payments.
Open to Every Builder — Human or Agent
QDay is designed for the full spectrum of onchain participants — developers, AI agents, start-ups, and enterprises — to build decentralized applications, run agentic commerce, and move payments on a single, shared chain.
EVM Compatibility
Fully compatible with the Ethereum Virtual Machine, QDay lets developers deploy existing Ethereum smart contracts with minimal changes, backed by SDKs, APIs, and full chain infrastructure support — reducing migration costs and the learning curve for builders.
Build for Agents
QDay is natively integrated with the x402 standard, giving AI agents a fast, low-cost payment rail for autonomous, machine-to-machine transactions — from micropayments to high-frequency agentic commerce, with no human in the loop required.
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