Swap Providers

Introduction

The Notus API /swap/quote endpoint provides a real-time quote for token swap operations. The API queries multiple liquidity providers, automatically selects the best route considering price, fees, slippage, and liquidity availability, and returns an execution-ready quote. Each provider's fees are accounted for during routing, so the final price returned already reflects any embedded costs.

By aggregating several providers, the Notus API delivers better pricing and deeper liquidity, supporting both same-chain swaps and cross-chain swaps when applicable.

Integrated Providers

Enso

• Name: Enso
• Description: DeFi aggregator/router that integrates multiple liquidity sources to find efficient swap routes. Operates across several EVM networks (e.g., Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche) and is known for advanced routing strategies and multicall compositions.
• Differential: Provides faster quote responses
• Fee: No fees are directly charged by Enso.
• Audit link: https://github.com/EnsoBuild/enso-audits

LI.FI

• Name: LI.FI
• Description: Cross-chain aggregator that combines bridges and DEXs to execute swaps and transfers across multiple blockchains (EVM and non‑EVM). Supports networks such as Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Base, among others, selecting routes based on cost and settlement time.
• Differential: Known for better stability
• Fee: 0.25% service fee on each transaction. Integrators can add their own fee percentage and integrator string during setup. Volume-based commercial discounts available.
• Fee Documentation: https://docs.li.fi/guides/fees-monetization/faq#does-li-fi-charge-a-fee-on-every-swap-or-bridge-transaction
• Security: In‑house security team; each release is independently audited by a qualified third‑party; periodic API penetration tests; smart contract monitoring. See: https://docs.li.fi/introduction/learn-more/security-and-audits#security-and-audits
• Audit link: https://li.fi/knowledge-hub/li-fi-is-audited-twice-over/
• Audit notes: Public audits referenced are from 2022.

Odos

• Name: Odos
• Description: Order router that optimizes swaps by splitting volume and using multi‑step paths across liquidity pools. Serves popular EVM networks (e.g., Ethereum, Arbitrum, Polygon, BNB Chain, Avalanche, Base) with a focus on best effective price and low slippage.
• Differential: Often yields better destination amount output
• Fee: Market Orders - 15 bps (0.15%) on volatile/custom assets, 3 bps (0.03%) on stablecoin swaps
• Fee Documentation: https://docs.odos.xyz/build/fees
• Audit link: https://docs.odos.xyz/build/audits

ParaSwap (also known as Velora)

• Name: ParaSwap
• Description: DEX aggregator focused on price efficiency and MEV protection, operating across several EVM networks (Ethereum, Polygon, BNB Chain, Avalanche, Fantom, Arbitrum, Optimism, Base). Offers route optimizations and reliable execution for both small and large order sizes.
• Fee: No fees are directly charged by ParaSwap
• Audit link: https://developers.velora.xyz/security

Rango

• Name: Rango
• Description: Cross‑chain aggregator that combines bridges and DEXs across different ecosystems (including EVM and non‑EVM networks) to find the best route between assets and chains. Suited for flows that require portability across networks.
• Fee: Rango charges 15bps (0.5%) per swap.
• Audit link: https://docs.rango.exchange/smart-contracts/audit-reports

Relay

• Name: Relay
• Description: Bridging/routing infrastructure used especially for flows that involve Bitcoin, in addition to inter‑chain routes. Focuses on integration simplicity and automated selection of paths with sufficient liquidity.
• Differential: Supports Bitcoin bridging
• Audit link: https://github.com/relayprotocol/relay-depository/tree/main/audit-reports

XY Finance

• Name: XY Finance
• Description: Cross‑chain aggregator connecting DEXs and bridges to offer inter‑chain swaps with good liquidity depth. Supports multiple blockchains and prioritizes routes with the best total cost and completion time.
• Differential: Often yields better output on cross‑chain swaps
• Fee: No fees are directly charged by XY Finance.
• Audit link: https://docs.xy.finance/smart-contract/security