What is Atum?

Atum is the first open payments network — a multi-sided network that connects payment initiators, settlement operators, and payment rails under a single coordination layer for tokenized currency payments. You submit a signed payment request; Atum selects a settlement operator’s price quote, the operator delivers the funds on the destination rail, and Atum verifies the delivery — without you managing correspondent relationships, liquidity, or rail infrastructure.

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The big idea

Most payment infrastructure bundles coordination, liquidity, and rail access into one opaque system. When something breaks or costs too much, you have no leverage — you’re locked in. Atum separates these concerns into four distinct layers. Each layer has a clear owner and a clear responsibility. You integrate once at the top; everything below is Atum’s problem to coordinate.

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What Atum does

When you submit a signed payment request, Atum checks it, collects price quotes from independent settlement operators and selects one. The selected operator delivers the payment, and Atum verifies the delivery before the operator is paid. See Atum payment lifecycle.

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Who can initiate a payment

Atum accepts payment requests from any application layer:

• Traditional apps — server-side services, payment backends, PSP integrations
• AI agents — autonomous workflows that call Atum
• Merchant endpoints — checkout flows and B2B invoice acceptance

The integration is the same regardless of who initiates — one API call, one receipt.

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Where Atum fits

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Who owns what

You own your customers, your app and your signing keys. Atum checks requests, selects quotes and verifies delivery. Settlement operators move the funds. The full split: Who owns what.

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What you can build

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What Atum is not

Atum is the coordination layer. By design, Atum does not:

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Next steps