Swap APIs: $214B Volume, 30% Revenue for Hardware Wallet Maker

The integration of swap APIs into crypto products accelerated sharply in 2025. 1inch processed $214 billion in total swap volume that year, up 39% from 2024. The platform completed 114 million swaps, more than double the prior year's activity. THORChain handled $4.02 billion in Q4 2025 alone across 1.22 million swaps. LI.FI's monthly volume hit $8 billion by October 2025, a 595% year-over-year increase.

For more on the broader trend, see our crypto market analysis.

These numbers reflect a structural shift. Swap APIs have turned what was once a custom engineering project into a plug-and-play integration. Five years ago, a wallet wanting to offer token swaps had to build a proprietary exchange engine or redirect users to an external platform. Both approaches introduced friction. Building an exchange engine required deep liquidity aggregation and routing optimization across multiple blockchain networks. Redirecting users created drop-off points and fragmented the user experience.

Swap APIs from providers such as 0x, 1inch, Uniswap, and ChangeNOW now abstract that complexity. A development team can integrate cross-chain swapping capabilities with minimal engineering overhead. The xPortal team completed their ChangeNOW API integration in approximately one week. Products that would have required months of specialized engineering can now launch swap features in days.

The NGRAVE case study illustrates the revenue potential. NGRAVE, a hardware wallet manufacturer, integrated Changelly's exchange API into its mobile app in August 2024. Within three months, completed swap transactions surged 400%. Swap transactions now contribute 30% of NGRAVE's total company revenue. User activity increased 30%. The bounce rate dropped 15%. This is a hardware company whose core product is physical security devices. An embedded swap feature became a primary revenue stream.

The 0x Swap API, available on the QuickNode Marketplace, includes built-in fee support that lets developers earn fees on every swap. LetsExchange offers partners revenue-sharing options of up to 50% on swaps. These models create alignment between API providers and integrating platforms. Both parties benefit from increased volume.

The industry's commitment to self-custody introduces specific technical requirements. Users must retain control of their private keys throughout the swap process. This rules out models where the API provider takes temporary custody of assets. Ledger's integration with the Uniswap API demonstrates how this constraint can be addressed. Users access onchain liquidity while staying within Ledger's secure signing environment. The API handles routing and execution, the user retains final approval authority through the hardware device. Exodus and MetaMask partnered to bring XO Swap's bridge functionality to MetaMask users. XO Swap aggregates multiple third-party swap APIs while maintaining non-custodial execution.

The technical challenge is non-trivial. APIs must support secure transaction construction and accurate gas estimation, with reliable execution across multiple networks. They never take control of user funds. Providers that solve this problem effectively gain a structural advantage.

Cross-chain transaction volumes surged to $56.1 billion in July 2025. Users do not want to manage separate wallets or interfaces for each blockchain. They expect their primary wallet or application to handle cross-chain transactions transparently. LI.FI now aggregates liquidity from DEX aggregators, bridges, and intent-based systems, providing routing across multiple chains through a single API. Rango Exchange surpassed $6 billion in lifetime routed volume, connecting to 55 DEXes and 31 active bridges. 1inch processed approximately $697 million in cross-chain swaps during 2025. Nearly 48,000 users utilized cross-chain functionality.

The xPortal case study highlights an important dynamic: improvements to swap infrastructure are most effective when they remain invisible to users. xPortal integrated ChangeNOW into its existing swap routing engine without introducing new interface elements or user decisions. The system automatically selected ChangeNOW routes when they offered better execution. Users experienced faster swaps and better rates without knowing why. Adding provider selection interfaces or advanced settings increases cognitive load and can reduce conversion rates. The goal is to reduce friction, not add options.

The API model is not without challenges. Liquidity fragmentation remains a structural issue. Assets are spread across centralized exchanges, decentralized exchanges, and separate blockchain networks. No single API can guarantee optimal execution across all pairs and all market conditions.

Reliability is another concern. The 0x Swap API maintains 99.9% uptime with a median response time under 250ms. Not all providers meet these standards. For production applications, API downtime translates directly to lost revenue and user frustration.

Security is a separate challenge. APIs must handle token approvals securely and support modern standards such as Permit2 and AllowanceHolder. Protection against MEV attacks is a separate requirement. The 1inch Swap API includes MEV protection against frontrunning and sandwich attacks.

For businesses operating in this sector, the question is no longer whether to integrate swap functionality. The question is how to optimize the integration for revenue generation and user retention. The NGRAVE case study demonstrates that swaps can become a primary revenue stream even for products not traditionally associated with trading. The xPortal case study shows that infrastructure improvements can deliver measurable user benefits without interface changes.

The data from 2025 shows sustained demand for programmatic swap execution. 1inch processed $214 billion in volume. THORChain handled $4.02 billion in Q4. LI.FI's monthly volume reached $8 billion. API-driven swap execution is a core function of the crypto market.