# Fystack > Stablecoin wallets & treasury automation Fystack is a custody technology provider for stablecoin payments. It lets fintechs and payment teams run MPC wallets, automated sweeps, and approval policies through one API, either managed or self-hosted. Fystack is a custody technology provider that builds wallet infrastructure for stablecoin payments and treasury management. It lets businesses create wallets, accept deposits, and send payouts across multiple blockchains through one API. It is aimed at fintechs, payment processors, and digital asset platforms that want to run their own stablecoin rails without a dedicated blockchain team. Each private key is split into shares held on independent nodes, so transactions are signed without the full key ever being assembled. Policies, approval groups, and spending limits control who can move funds, and automated sweeps consolidate customer deposits into treasury wallets. Gas sponsorship and balance alerts reduce routine operations work. Fystack runs as a managed cloud service or as a self-hosted deployment on the customer's own infrastructure. It also maintains Mpcium, an open-source MPC engine that teams can run on their own node cluster. Payment processors, fintechs, and digital asset platforms use Fystack to move stablecoins. - Type: Company - Sector: Custody and Wallets - Status: Active - Founded: 2025-07-01 - Profile: https://thegrid.id/profiles/fystack_io ## Products - [Fystack](https://thegrid.id/profiles/fystack_io): Fystack is a custody technology platform that lets businesses create and operate MPC wallets for stablecoin deposits, payouts, and treasury management. Each private key is split into shares held on independent nodes, so transactions are signed without the full key ever being assembled. Teams use one API across multiple blockchains, with automated sweeps, gas sponsorship, and approval policies, on the managed cloud or on their own infrastructure. (Custody Technology Provider, Live, Main Product) - [Mpcium](https://thegrid.id/profiles/fystack_io): An open-source MPC engine that lets teams run their own secure node cluster for distributed key management and transaction signing. Private keys are never stored or reconstructed in one place, with a threshold signing scheme requiring consensus across nodes before any operation executes. (Custody Technology Provider, Live) ## Links - [Main](https://fystack.io) - [Documentation](https://docs.fystack.io) - [Blog](https://fystack.io/blog) - [Privacy policy](https://fystack.io/privacy) - [Terms of Service](https://fystack.io/terms) - [Twitter / X](https://x.com/fystack) - [GitHub](https://github.com/fystack) - [LinkedIn](https://www.linkedin.com/company/fystack) - [YouTube](https://www.youtube.com/@Fystack) - [Telegram](https://t.me/+9AtC0z8sS79iZjFl) ## Legal This data is provided under two licensing models. Model 1 - open data. The open data core is licensed under the Open Database License (ODbL) — a copyleft/share-alike license allowing free use, modification, and sharing for any purpose. Attribution is required: include "Powered by The Grid" linking to https://thegrid.id wherever the data is used. Derivative databases must be shared under ODbL terms. Trademarks, logos, and brand names (marked "Special TPIP") are not covered by the ODbL. 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