--- title: "Modern Treasury's Stablecoin Sandwich" url: https://daily.dev/posts/modern-treasury-s-stablecoin-sandwich-ehswa5it3 source_url: https://news.alvaroduran.com/p/modern-treasurys-stablecoin-sandwich type: article source: "The PayEng Playbook" published: 2026-02-19T11:14:29.142Z updated: 2026-02-19T11:14:58.903Z tags: ["fintech"] reading_time: 10 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Modern Treasury's Stablecoin Sandwich **[The PayEng Playbook](https://daily.dev/sources/alvaroduran)** · 10 min read · 0 upvotes · 0 comments ## Summary Modern Treasury, after acquiring stablecoin startup Beam, is launching an integrated PSP that unifies fiat and stablecoin payments under a single API. The core concept is the 'Stablecoin Sandwich': fiat enters on one side, gets converted to stablecoins for cross-border transfer, then converted back to fiat on the other end — making crypto rails invisible to end users. This approach lets companies experiment with stablecoins without building separate integrations, using the same endpoints as ACH, FedNow, and Wire. The key trade-off: stablecoins are faster and cheaper than traditional rails but are unforgiving — transactions are irreversible, requiring correctness upfront. The strategy mirrors Stripe's evolution toward a unified payment abstraction, applied now to bridging fiat and crypto. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Thirstday \#1 — Crypto Built the Rails. Where Is the Consumer Layer?](https://daily.dev/posts/thirstday-1-crypto-built-the-rails-where-is-the-consumer-layer--h2uodjz5n) · Coins Bench · 0 upvotes · 0 comments --- Tags: [#fintech](https://daily.dev/tags/fintech) [View this post on daily.dev](https://daily.dev/posts/modern-treasury-s-stablecoin-sandwich-ehswa5it3)