Quack AI: launches mainnet payment rails - 20 Jul 2026

Quack AI announced that Q402 MCP is now live on mainnet, bringing "Gasless stablecoin rails for AI agents" across 12 chains.The release moves Quack AI's core payment product from development into production. That changes the project from describing a planned system to offering an available multi-chain rail that AI agents can use without the extra steps highlighted in the announcement, such as gas fees, approval prompts, and manual invoicing.For Q, the practical relevance is that the product is now usable rather than theoretical. That can support a measured reassessment of the project because the underlying service is available on mainnet. A limit is that launch status alone does not show sustained adoption, payment volume, or whether usage translates into token value capture.Every agent payment still runs on rails built for humans.Gas fees. Approval popups. Manual invoices.So we rewrote them.Gasless stablecoin rails for AI agents. Live on 12 chains, 200K+ settlements, under a second.npm i @quackai/q402-mcp