7 Ways Businesses Are Using Crypto Swap APIs

For many wallets, fintech applications, and cross-chain platforms, embedded swap infrastructure has become a way to expand asset coverage, improve execution, and generate new revenue streams without taking on the complexity of operating an exchange.

Instead of building liquidity systems from scratch, companies increasingly rely on crypto swap APIs (Application Programming Interface) that connect users to multiple liquidity sources while preserving existing user experiences.

Real-world deployments show how the best crypto APIs can streamline user flows, strengthen retention, and support scalable growth through embedded swaps.

Here are seven ways companies are putting the infrastructure to work.

1. Cross-Chain aggregators

Rubic, a cross-chain aggregation platform launched in 2020, routes trades across more than 340 decentralized exchanges, bridges, and intent protocols spanning 70-plus networks.

Its coverage across Ethereum Virtual Machine (EVM)-compatible chains was strong, but major ecosystems such as Bitcoin (BTC), Monero (XMR), and Cardano (ADA) operate on fundamentally different architectures, requiring custom bridges, dedicated nodes, and separate liquidity pipelines to support natively.

To address that challenge, Rubic integrated the ChangeNOW Crypto Exchange API as an external execution layer for non-EVM assets, adding instant swaps for BTC, XMR, and ADA through a single integration point.

New-chain deployment became faster, swap success rates on cross-chain routes improved, and transaction volume rose on high-demand pairs tied to the new asset support.

“Exchange speeds are excellent, and the range of supported networks is broad,” the Rubic team said, noting that a dedicated account manager meant issues were resolved without the delays typical of support queues.

The cross-chain coverage problem shows up differently for AI-native products.

Warden, an AI trading interface that lets users manage and swap assets through a chat interface, hit routing bottlenecks early after launch, RPC limits threatened reliability, and liquidity was initially limited to the Solana ecosystem.

By integrating the Uniswap Trading API, Warden scaled to more than 650,000 swaps across 14 chains in three weeks and went live in under 72 hours, with 500,000-plus users supported.

2. Exchange aggregators

An anonymous hybrid exchange aggregator routing across hundreds of venues observed its users dropped off at the wallet-connection step, before pricing or coverage ever became a factor.

In DeFi-native flows, the connect-wallet step serves as an exit point for a share of users, particularly those holding larger balances, who weigh smart contract permissions and phishing risk before linking a wallet to an unfamiliar platform.

The aggregator replaced the wallet connections requirement with a simple deposit-and-receive flow using the ChangeNOW Exchange API, allowing users to send assets to a generated address and receive the swapped tokens in their chosen wallet without granting permissions or giving up custody.

The reported result was lower abandonment at first interaction and access to a security-conscious segment that avoids wallet connectivity by default.

“Definitely move ahead and integrate,” a brand representative said, noting the team found the customer support strong and the integration process smooth.

3. Protocols and payments

Tonbankcard, an open financial protocol on the TON blockchain that structures accounts as NFTs, hit a wall at the moment of first use.

Users arrived holding assets on other chains, but funding a Tonbankcard account required assets native to the TON ecosystem.

Resolving that mismatch previously meant leaving the product, finding an external exchange or bridge, completing the swap manually, and returning, with each additional step raising the probability of abandonment.

Tonbankcard integrated the ChangeNOW Exchange Widget into its interface, reducing the number of steps required to fund an account by 50%, according to the company.

The integration also enabled on-ramp and cross-chain swap functionality for fiat and crypto users.

Businesses evaluating payment infrastructure for similar use cases can find fiat on- and off-ramp options built into ChangeNOW’s API offering, available on request.

4. Monetizing swap flows

The same Tonbankcard integration produced a second outcome, establishing a revenue share at 0.4% of transaction volume, adding a predictable income stream from in-app swap activity.

As users exchanged assets to fund accounts, the protocol earned commissions on each transaction through a revenue-sharing model, supporting earlier self-sustainability without introducing a centralized structure or additional custody obligations.

ChangeNOW’s partner program, like similar arrangements offered elsewhere in the industry, starts at 0.4% of transaction volume and allows commissions to vary by asset, pair, or swap size.

Interface, a social network and block explorer for the Ethereum ecosystem, took a similar path using the open-source DEX aggregation infrastructure layer 0x Protocol’s Swap API.

The team integrated 0x v2, the protocol’s next-generation trading engine with built-in monetization controls and enhanced trade routing, in under a month and went from zero to $3.5 million in social trading volume in 70 days, with daily volume reaching $500,000 by the end of that period.

The revenue came directly from swap fees built into the integration using 0x’s built-in monetization controls, with no separate billing infrastructure required.

5. Super Apps

xPortal, an all-in-one crypto super app, routes every swap through an automated engine that evaluates multiple liquidity providers and picks the best execution on each pair.

ChangeNOW was integrated directly into that engine and selected automatically whenever it offered superior rates, with the full integration only taking one week.

During a zero-deposit-fee promotional period, ChangeNOW routes won frequently across supported pairs, including on EGLD, the native token of the MultiversX blockchain.

Users received improved pricing without any change to their experience, and xPortal reported higher conversion and increased swap activity.

“Integrating partners deeply into existing systems, instead of adding surface-level options, leads to better results,” former CEO Sergiu Biriș said.

Digital asset platform Anchorage Digital took a similar approach for its institutional self-custody wallet, Porto.

The team integrated the Uniswap Trading API, giving institutional clients direct access to decentralized liquidity across more than 14 blockchains without building the routing infrastructure themselves.

6. Wallets under scale

Bitcoin.com Wallet’s in-app swaps gained traction after their 2021 launch, but rising demand exposed limitations in its single swap provider, resulting in slower execution and delayed support for trending tokens.

Building a proprietary exchange system carried licensing complexity, liquidity management overhead, and engineering risk to the core wallet product, so the team adopted a multi-partner model, starting with ChangeNOW as a complementary provider.

The company reported a 10% improvement in service stability, a 15% to 18% increase in processing speeds, and a 40% reduction in the time required to add in-demand assets.

That asset velocity drove a 20% to 25% increase in user activity and overall traffic.

“It has been critical for us to work with a partner who does not simply process exchanges but helps us remain fast, stable, and relevant for our users,” the Bitcoin.com Wallet team said.

7. Self-custody products

Zelcore, a multi-chain non-custodial wallet covering more than 70 blockchains, built its product around user control of private keys and a zero-knowledge stance on user data.

As the wallet expanded, users could store assets in Zelcore but had to leave the platform to swap them, interrupting the experience and exposing them to custodial environments.

Building an in-house liquidity layer would have pulled the product into KYC, AML, and licensing obligations, a direct conflict with the wallet’s custody model.

Zelcore then integrated the ChangeNOW Exchange API in 2021 and brought swaps inside the wallet without staffing a separate exchange team or changing the custody architecture.

Five years on, after migrating to an aggregated backend that routes across multiple providers spanning CeFi and DeFi, ChangeNOW is the most-used route in the system.

“The partnership held through a full crypto market cycle and Zelcore’s transition to backend aggregation, a transition that displaces many providers, but that ChangeNOW navigated alongside us,” the Zelcore team said.

The same challenge led crypto wallet Ledger to integrate the Uniswap Trading API into Ledger Wallet, allowing users to access decentralized swap functionality without leaving the app.

The integration provided access to permissionless on-chain liquidity while preserving Ledger’s hardware-backed security model.

For early-stage wallets, the harder problem often starts after launch.

A product may already work, and users may already be testing it, yet revenue can still depend on whether swaps are available inside the interface from day one.

Recognizing this challenge, ChangeNOW’s Fast-Track Program provides a limited number of selected wallet teams with free direct support to integrate its exchange API, activate revenue sharing, and get launch visibility.

Once approved, partners can activate in-app swaps, turn on revenue attribution, and start from a 0.4% share of exchange volume.

The platform also supports approved projects with PR, social media exposure, conference visibility, and hands-on launch guidance.

Conclusion

Crypto swap infrastructure works best when it matches the product’s actual need, whether that be coverage, custody, execution, onboarding, or revenue. The lesson is to start from the end goal and work backwards in order to determine what the best crypto swap API is to meet those requirements.