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Tempo Opens Public Testnet for Stablecoin Payments With Mastercard and UBS as Partners

Developers, banks, card networks, and fintechs now have live access to test stablecoin payments with predictable sub‑cent fees.

Overview

  • Tempo, incubated by Stripe and Paradigm, launched a public testnet that lets any company run nodes and build stablecoin payment applications.
  • Payments-specific features now live include dedicated lanes that reserve blockspace for transactions, stablecoin‑native gas with fees around 0.1 cent, and targets for sub‑second finality on an EVM‑compatible chain.
  • New design partners—Mastercard, UBS, Klarna, and Kalshi—join earlier participants such as Visa, Deutsche Bank, Shopify, OpenAI, Nubank, Revolut, DoorDash, Standard Chartered, Anthropic, and Coupang.
  • Tempo confirmed integration with Chainlink CCIP for interoperability and reported onboarding 40+ ecosystem partners across wallets, custody, compliance, analytics, and developer tooling.
  • The testnet currently runs with four team‑operated validators, with plans to add independent and partner validators before moving to permissionless participation; the mainnet timeline is undecided as pilots progress, including Klarna’s planned stablecoin rollout in 2026.