Introducing Nimiq Pay

Atomic Swap
Everything With OASIS

Nimiq’s Open Asset Swap Interaction Scheme (OASIS) is the blueprint that describes how to make off-chain assets such as USD, EUR, stock certificates, web domains and many more behave as if they were tokens on a blockchain.

  • Who can use Nimiq OASIS

    Nimiq OASIS is an open technology. Everyone can use it and implement it. DEX’s looking to provide an easy way for users to buy and sell crypto for fiat. Developers creating OTC services and applications. DeFi projects interested in creating Crypto-Fiat On/Off Ramps.

  • TEN31 Bank uses OASIS

    The German bank, specialized in the emerging blockchain space, is the first party to integrate OASIS into their regulated banking infrastructure and currently provides an API to their Euro-HTLC implementation

  • HTLC

    Hashed Time-Lock Contracts are special smart contracts. They are executed if a certain condition is met or reverted if a certain time period elapses.

  • Atomic Swaps

    Atomic Swaps connect two HTLCs by making their execution dependent on each other.

Use cases

Crypto to FIAT Atomic Swap

With OASIS, Fiat HTLCs become possible. They enable direct Atomic Swaps between on-chain assets like BTC, ETH and NIM with fiats like EUR and USD. This way, crypto can be bought for fiat – decentralized, without KYC and almost instantanious. This is especially interesting for DEXs, and DeFi projects that want to provide these features for their users with low fees.


Accept crypto while receiving fiat.

OASIS allows merchants to accept crypto, like NIM or BTC while receiving fiat like Euro directly to their bank account.

If a customer wishes to pay in crypto, the merchant requests a payment provider (like Nimiq FAST – coming soon) to set up the Nimiq OASIS Atomic Swap. The customer funds the crypto HTLC, releasing the crypto to the payment provider. The merchant is then able to claim the Euro and sends out the goods.


Facilitate cheap and non-custodial remittances.

Nimiq OASIS is an almost universal concept able to exchange virtually any digital asset. Besides exchanging crypto for fiat, it can leverage and apply the advantages of blockchain technology to fiat/fiat exchanges. Imagine atomic swapping Euro for Dollar, Dollar for Yuan, Yuan for Rupee.

A remittances provider can request fiat HTLCs from two banks that have implemented Nimiq OASIS. Alice funds the HTLC provided by her bank and releases currency to the remittances provider. By doing so, Bob can claim the equivalent value in his currency, using the HTLC provided by his bank and funded by the remittances provider.

Nimiq offers an open API for you to build on

Nimiq OASIS solves a fundamental problem by providing an easy, low-fee way to buy and sell crypto using fiat money, (EUR/USD) without the need to setup accounts on crypto exchanges.

With Nimiq Oasis, a simple bank transfer results in a guaranteed corresponding crypto-delivery, directly into your wallet.

The more OASIS is used, the more NIM is used: Every time someone transacts via OASIS a 1% fee applies for the use of the OASIS API. For at least the first 24 months from its official launch, the collected fees are used to buy NIM off the market, which then are held by the Nimiq Foundation to increase scarcity and for the future benefit of the project.

Integrate it

Resources and documentation

The team put together useful resources and links to guide any implementation and integration. Reach out to us for assistance and other inquiries.

  • OASIS integration

    Get to know the OASIS API and learn how to integrate it.

  • Fastspot integration

    Create you own service with the Fastspot API, a buying and selling solution powered by OASIS.

  • OASIS Sandbox

    Play around with the OASIS API or test your integration in a safe sandbox environment.

  • Coming soon

    OASIS client libraries

    In a combined effort with our amazing community, we'll soon publish the first client libraries for languages like JavaScript, Java or Rust.

Talk to a nimiq expert

Collaborate with NIMIQ and integrate OASIS

Team Nimiq offers dedicated service and support for strategic partners. Get in contact and be one of the first to leverage a new paradigm in value transfer.


None of the statements must be viewed as an endorsement or recommendation for Nimiq, any cryptocurrency, or investment product. Neither the information, nor any opinion contained herein constitutes a solicitation or offer by the creators or participants to buy or sell any securities or other financial instruments or provide any investment advice or service. All statements contained in statements made in Nimiq’s web pages, blogs, social media, press releases, or in any place accessible by the public, and oral statements that may be made by Nimiq or project associates that are not statements of historical fact, constitute “forward-looking statements”. These forward-looking statements involve known and unknown risks, uncertainties, and other factors that may cause the actual future results, performance, or achievements to be materially different from any future results, performance, or achievements expected, expressed, or implied by such forward-looking statements.