Tempo’s development team opened the project’s public testnet to anyone willing to build on it, marking the first milestone since the payments-focused L1 chain was unveiled earlier this year.

According to the team’s blog post, the release offers a working preview of a blockchain designed specifically for stablecoin settlement, rather than a general-purpose system stretched to handle financial transactions. Tempo is built around a fairly blunt observation: most blockchains still struggle with predictable fees, fast settlement, and the kind of determinism payment processors consider nonnegotiable.

The network aims to score better on all three fronts by delivering sub-second finality, low stablecoin-denominated fees, and a dedicated payments lane engineered to avoid traffic jams from unrelated activity like non-fungible token “(NFT) mints, liquidations, or high-frequency contract calls.”

The release on Tuesday explains that the public testnet stitches together the core pieces of that vision — instant settlement, one-tenth-of-a-cent fee targets, and support for USD-denominated stablecoins without requiring a volatile gas token. Developers can also experiment with protocol-level memo fields, batch transfers, scheduled payments, and a built-in exchange that converts fees across supported stablecoins.

Tempo’s origins trace back to Stripe’s incubation of the project, and the blockchain project now operates fairly independently now after raising a sizable $500 million Series A in October 2025 at a $5 billion valuation. Its compatibility with Solidity tools is deliberate, meant to lower the barrier for developers who already know their way around Ethereum’s infrastructure.

The company has recruited a wide roster of design partners to test real-world payment workloads — a mix that includes financial institutions, fintechs, and enterprise operators. The testnet also ships with an early version of Tempo’s decentralized future: an open-source client under the Apache license and a permissionless environment where anyone may deploy contracts or run a node.

“Since our announcement, we’ve expanded the Tempo ecosystem with an additional 40 infrastructure partners who span developer tools, on- and off-ramps, DeFi applications, and more. They each enable critical services to help businesses and users interact with Tempo,” the team detailed on Tuesday.

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Despite its ambitions, the project remains in its early innings. The current testnet relies on a rotating set of four validators operated internally, though Tempo plans to expand this group as it moves toward mainnet. Its roadmap centers on improving reliability, scaling throughput, introducing new developer tools, and stress-testing real payment volumes.

Tempo’s broader pitch is straightforward — whether it can make onchain payments behave like the internet’s existing payment channels but with modern settlement guarantees. Now that the testnet is open, developers will be the ones to decide whether the network’s theory holds up under practical scrutiny.

The project isn’t entering an empty room — it’s stepping into a crowd of L1 and L2 contenders with similar stablecoin ambitions, from Coinbase’s Base to Circle’s Arc, Tether’s Stable L1, and a handful of others eager to chase the same prize.

• What is Tempo?
  Tempo is a Layer 1 blockchain built for high-scale stablecoin payments with low fees and fast settlement.
• Why is the testnet launch notable?
  It provides the first public environment for developers to test Tempo’s payments-oriented features.
• Does Tempo use a native gas token?
  No — fees are paid in supported USD stablecoins, avoiding reliance on volatile assets.
• When will Tempo move to mainnet?
  A timeline has not been announced, as the project plans to expand validators and refine performance before launch.

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