Innovation doesn’t always start from scratch—it can begin with an API. By empowering developers worldwide, OKX Web3 Wallet is redefining how decentralized applications are built and scaled.
Driven by a deep-rooted innovation ethos, OKX Web3 Wallet continuously refines its product internally while actively expanding external collaborations. A key pillar of this strategy is the dual focus on open-source development and robust API infrastructure. These efforts are more than technical upgrades—they’re foundational to the evolution of the Web3 ecosystem.
By embracing open APIs and transparent codebases, OKX lowers barriers to entry, fosters global developer collaboration, and accelerates the pace of innovation in blockchain infrastructure. While these components may remain “invisible” to end users, they form the backbone of seamless, secure, and scalable Web3 experiences.
This article dives deep into one such invisible foundation: the OKX Web3 Wallet API. As the first installment in the Invisible Infrastructure series—and the debut of our OKX Web3 API Deep Dive series—we aim to illuminate the powerful tools available to developers today. Whether you're building a wallet, DApp, DeFi protocol, or NFT marketplace, understanding these APIs is key to turning ideas into reality.
Understanding the OKX Web3 Wallet API Framework
An API (Application Programming Interface) acts as a bridge between software systems, enabling them to communicate, share data, and leverage existing functionalities without rebuilding from scratch. In the world of Web3, APIs are essential for accelerating development, ensuring interoperability across chains, and enhancing security through standardized protocols.
OKX Web3 offers OnchainOS, a comprehensive multi-chain Web3 development engine designed to streamline integration across blockchains and services. OnchainOS standardizes access to critical components like wallets, DEX aggregators, marketplaces, and DeFi protocols—along with liquidity routing and on-chain data solutions—drastically reducing development time and operational costs.
For developers seeking to build their own Web3 applications, adopting OnchainOS means faster time-to-market and reduced technical overhead. The platform provides detailed, well-documented, and visually supported API references that guide integration step by step.
👉 Discover how easy it is to integrate advanced Web3 features using OKX’s developer tools.
With support for over 100 public blockchains, OKX Web3 Wallet delivers a unified experience across mobile apps, browser extensions, and web platforms. It encompasses five core modules:
- Non-custodial wallet services
- DEX Aggregator
- NFT & Runes Marketplace
- DeFi Aggregation
- DApp Explorer
Additionally, it supports cutting-edge capabilities like Bitcoin Ordinals and Runes trading, positioning itself at the forefront of next-generation blockchain innovation.
Let’s explore how each major module leverages APIs to empower developers.
Wallet API: Build Multi-Chain Wallets in Minutes
At the heart of OKX Web3’s offering is its Wallet API, which provides the underlying infrastructure for non-custodial wallet solutions. This enables developers to quickly launch products such as multi-chain wallets, embedded DApp wallets, or even exchange-integrated wallet systems.
Key Features:
- Multi-chain address aggregation with asset tracking across millions of addresses
- Support for 60+ networks, including EVM-compatible chains (Ethereum, Polygon), Solana, TRON, and BTC-based protocols (including Ordinals)
- High availability and stability, backed by real-time monitoring and failover systems
Integration takes just three steps, allowing developers to securely onboard users across major ecosystems like Ethereum, Solana, Bitcoin, and beyond.
The Wallet API includes several functional modules:
1. Account Management
Unlike basic single-address queries, this API supports structured multi-address subscriptions under a single account—ideal for managing cross-chain portfolios.
Two account types are available:
- Wallet Account: Requires message signing for authentication; supports custom tokens and transaction execution
- Observer Account: No signing needed; displays all tokens indexed by OKX; read-only access
Developers can use APIs to create accounts, manage associated addresses, update settings, delete accounts, and retrieve historical data.
2. Asset Management
Easily track balances across multiple assets. Developers can:
- Add or remove subscribed tokens
- Fetch real-time balance data
- View total portfolio value
Note: Only wallet accounts support custom token additions; observer accounts pull data from OKX’s pre-indexed list.
3. Transaction Management
Full lifecycle control over transactions:
- Retrieve gas price, gas limit, nonce
- Validate addresses
- Broadcast signed transactions
- Query transaction history by account or hash
- Support for both EVM (account model) and UTXO (Bitcoin model) networks
4. Additional Utilities
- Chain-specific data queries (e.g., UTXO details)
- Webhook integration for real-time event subscription (blocks, transactions)
- Batch up to 20 subscriptions per request
This flexibility makes the Wallet API ideal for building institutional-grade custody solutions, portfolio trackers, or embedded finance products.
DEX Aggregator API: Smarter Swaps Across Chains
OKX DEX Aggregator is a one-stop multi-chain and cross-chain swap solution, integrating over 25 cross-chain bridges, 40+ public chains, and 400+ decentralized exchanges.
Powered by X Routing, its intelligent routing engine splits trades across multiple DEXs to deliver optimal pricing with zero platform fees. It also includes features like limit orders and KYT (Know Your Transaction) security checks.
Core Capabilities:
- Sub-100ms response time
- Free access to optimized quote paths
Support for complex routing:
- Single-chain swap
- Bridge-only transfer
- Multi-leg: Swap → Bridge → Swap
At the core lies XBridge, OKX’s proprietary smart contract system enabling seamless cross-chain transfers between EVM chains, heterogeneous chains (like Bitcoin), and hybrid combinations.
Developers can integrate the DEX Aggregator API into wallets, trading bots, or DeFi dashboards.
1. Swap API
Aggregates liquidity from top DEXs like Uniswap, Curve, and Balancer. The system evaluates:
- Price depth
- Slippage
- Transaction cost
Using smart order splitting and PMM (Professional Market Maker) comparisons, it delivers better rates across three dimensions: higher liquidity, lower slippage, superior pricing.
API endpoints allow querying supported chains, token lists, liquidity pools, approval data, and swap quotes.
2. Cross-Chain API
Integrates leading bridges including Circle CCTP, Stargate, Wormhole, Across, and SWFT. The algorithm compares:
- Bridge fees
- Slippage
- Final received amount
It intelligently routes transactions—e.g., swap on source chain → bridge → swap on destination—to maximize output.
Developers can fetch bridge options, path details, initiate transfers, and track status via API.
3. Limit Order API
Allows users to set target prices for buying or selling tokens. Orders execute automatically when market conditions match.
Key benefits:
- Zero slippage for creators
- Partial fills supported
- Orders are filled by takers within the aggregator’s liquidity pool
API functions include creating orders, querying active/past orders, fetching supported chains/tokens, and managing approvals.
👉 Start building smarter trading experiences with powerful DEX aggregation tools.
Marketplace API: Unified NFT & Runes Trading
OKX Marketplace supports 26 major blockchains, including Bitcoin and Ethereum, across four key segments: EVM NFTs, Runes, Ordinals (BRC-20), and issuance platforms.
1. NFT Marketplace API
A decentralized aggregator pulling listings from OpenSea, Magic Eden, LooksRare, and others. Offers:
- Multi-marketplace listing in one click
- Lower fees and higher liquidity
- Real-time on-chain data feeds
APIs enable:
- Fetching NFT details and collection metadata
- Querying listings, bids, purchases
- Getting network and marketplace availability
Ideal for building analytics dashboards or automated bidding bots.
2. Runes Market API
As the first app-native platform supporting Runes trading, OKX enables batch purchases ("copping") and etching with no platform fees.
API access includes:
- Collection info & trending lists
- Transaction history
- Wallet asset lookup
- Order submission
Perfect for developers building Runes indexers or trading tools.
3. Ordinals Market API
The largest marketplace for BRC-20 tokens and BTC NFTs, fully decentralized with no service fees.
APIs support:
- Creating and submitting inscriptions listings
- Fetching铭文 asset lists and collections
- Retrieving order books and trade histories
Enables creation of Bitcoin-native financial tools and explorers.
DeFi API: One Gateway to 80+ Protocols
OKX Web3 DeFi is a leading DeFi aggregation platform, connecting over 80 protocols—including Aave, Compound, Curve, Yearn, and Uniswap—across 15+ networks like Arbitrum, Ethereum, and Polygon.
The DeFi Open API standardizes interactions across yield-generating products.
Key Functions:
- Information Queries: Protocol list, token list, product details, network support
- Estimation Calculations: Projected returns for deposits or withdrawals
- Transaction Data Generation: Approval calls, deposit/redeem/claim reward payloads
- User Data Access: Holdings, balances, redemption requests
By integrating this API, developers can embed full DeFi functionality into apps—allowing users to earn yield seamlessly across protocols.
Innovation at Scale: Partnering with Global Developers
Open APIs aren’t just technical tools—they’re catalysts for ecosystem growth. By opening its infrastructure, OKX Web3 Wallet fosters transparency, interoperability, and community-driven innovation.
Developers gain:
- Standardized access to powerful Web3 primitives
- Faster prototyping and deployment cycles
- Trust through auditable documentation
This openness builds confidence among users and invites broader participation in shaping the future of decentralized finance.
As more projects integrate with OKX’s APIs, we move closer to a truly interconnected blockchain ecosystem—one where innovation thrives not in isolation, but through collaboration.
“What we’re building today lays the foundation for tomorrow’s breakthroughs.”
Frequently Asked Questions
Q: What is OKX Web3 Wallet API used for?
A: It enables developers to integrate wallet services, DEX swaps, NFT trading, Runes/Ordinals support, and DeFi yield strategies into their applications using standardized interfaces.
Q: Is there a cost to use OKX Web3 APIs?
A: Most APIs are free to use with rate limits appropriate for development and production environments. Enterprise-tier access may offer enhanced throughput.
Q: Which blockchains are supported?
A: Over 100 chains including Ethereum, Solana, TRON, Bitcoin (for Ordinals/Runes/BRC-20), Arbitrum, Polygon, BSC, Optimism, Avalanche, and more.
Q: Can I build a cross-chain DApp using these APIs?
A: Yes. With Wallet API for account management and DEX Aggregator API for bridging/swaps, you can create fully functional cross-chain applications.
Q: How do I get started with integration?
A: Visit the official documentation portal for detailed guides, code samples, and testnet environments to begin development immediately.
Q: Are there webhook or real-time data options?
A: Yes. The Wallet API supports webhooks for real-time monitoring of blocks and transactions—batching up to 20 subscriptions per call.
Core Keywords:
OKX Web3 Wallet API, Web3 development, DEX aggregator, NFT marketplace API, DeFi integration, multi-chain wallet, Runes trading, Ordinals API
👉 Unlock the full potential of Web3 development—start integrating now.