Swap API
One integration for every DeFi trade
13Networks
Simple integration. Limitless applications.
Comprehensive
One core API for intents, aggregation and cross-chain swaps. Build trading, liquidity management and more.
RWA-ready
Tokenised real-world assets supported as standard. 1inch Swap API already powers trading for Ondo and XStocks tokens.
Built for enterprise
With 99.9% uptime, SSO & multi-user management, and ISO 27001 certified data management.
Get the whole package
Integrate the 1inch Swap API & 15+ more in one scalable subscription
Trusted by the biggest names in DeFi - and beyond
Three swap modes in one API
Aggregator
Harness the new Pathfinder algorithm to access unmatched liquidity with sector-leading gas-efficiency & speed
Intents
Build swap UX with consumer-grade simplicity and institutional-grade reliability — gasless and MEV-protected by default.
Cross-chain
Go cross-chain without the bridge risk: gasless on every network, and orders settle atomically with no MEV exposure.
RWA-ready
Expand into the fastest-growing digital asset class.
Integrate tokenized assets from Ondo, xStocks & more.
Power RWA trading with deep aggregated liquidity.
13+ networks supported
Ethereum
BNB Chain
Polygon
Optimism
Arbitrum
Gnosis
Avalanche
ZKsync
Base
Linea
Unichain
Sonic
Solana
Exceptional performance, as standard
165msAverage 1inch Fusion quote latency
99.6%Transaction success rate
Integrate in minutes with AI
Use the Model Context Protocol to ship faster with AI-native developer tools.
One-prompt implementation
Your built-in 1inch expert has complete access to docs & examples to produce working code on demand.
Agentic trading, ready to go
Empower your agent to run from goal to on-chain swap, with optional automated signing and gasless execution.
Tools that fit your workflow
Works with Claude Code, Cursor, Windsurf, VS Code Copilot, JetBrains AI Assistant, OpenAI Codex, and Gemini CLI: one server URL connects them all.
Build on core DeFi infra
1inch protocols power decentralized trading. Discover the code for yourself.
// Classic Swap — best price across 600+ liquidity sources
const params = new URLSearchParams({
src: "0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE", // ETH
dst: "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48", // USDC
amount: "1000000000000000000",
});
const res = await fetch(
"https://api.1inch.com/swap/v6.1/1/quote?" + params,
{ headers: { Authorization: "Bearer " + API_KEY } },
);
const { dstAmount } = await res.json();
Supported Features
| Supported Features | Classic SWAP | Intent based SWAP | Cross-chain SWAP |
|---|---|---|---|
1inch Business is built for your human-agent team
Optimized for agentic deployment and efficient, human-first DX.
Questions? Answers.
What is a blockchain API?
A blockchain API is an interface that allows developers to interact with a blockchain network, enabling them to read data from the chain, submit transactions, or integrate blockchain functions into applications.
What are common use cases for blockchain APIs?
Typical use cases include building wallets, tracking transactions, accessing token balances, supporting DeFi applications, NFT marketplaces, payment solutions, and analytics dashboards.
Is KYC required to access developer APIs?
At 1inch, we're constantly working to improve platform security and build a compliant reputation within the overarching Web3 ecosystem. In line with this commitment, when creating a brand new 1inch Business account, all users must pass a standard Know Your Customer (KYC) verification process. This is a prerequisite for accessing and building with all 1inch APIs.
What onboarding and support do enterprise customers receive?
Every enterprise customer is assigned a dedicated relationship manager who guides them through the entire enterprise lifecycle. The onboarding and support process is fully tailored to a customer’s specific needs, ensuring personalized assistance and long-term partnership.
How do I get an API key ?
Sign up or log in to 1inch Business, complete a KYC/KYB procedure, create a project, and your API key will be available under the application details page in the project details.
Does 1inch have a free tier or trial for APIs?
Yes, every new account on the 1inch Business plan is automatically placed into the Dev plan, which is free of charge and offers 100,000 monthly API calls with a limit of 60 requests per minute.
Do you provide SDKs or example apps for a quick start?
Yes, 1inch offers SDKs, an interactive Swagger, and example guides to help developers integrate smoothly. For more details, explore the 1inch Business API docs.
How are overage charges handled if I exceed plan limits?
1inch does not apply automatic overage charges. Instead, you can top up your plan at any time if you need to increase your consumption within the current month.
What is 1inch’s role in Real-World Assets (RWA) integration?
1inch acts as a non-custodial aggregation and execution layer, enabling access to RWA tokens via the Swap API. 1inch does not issue, custody, or manage the underlying real-world assets.
Does 1inch custody or control RWA?
No. 1inch never takes custody of RWAs or user funds. All swaps are executed non-custodially on-chain.
Is 1inch the issuer or guarantor of RWA?
No. RWAs are issued, managed, and legally structured by third-party issuers. 1inch provides routing, pricing, and execution only.