Build anything with Phantom's developer platform
From embedded wallets in mobile apps to AI agents trading on-chain — here's everything developers need to know to get started with Phantom.
The Big Picture
Phantom isn't just a wallet anymore
Most developers know Phantom as the dominant browser extension and mobile wallet for Solana. But the product has grown far beyond that. Today, Phantom supports eight blockchains and offers a full developer platform — giving you the tools to embed wallet functionality directly into your apps, or even hand a wallet to an AI agent.
Whether you're building a DeFi dashboard, a gaming app, or an autonomous trading bot, there's a Phantom integration path designed for your use case.
Multi-chain support isn't an afterthought — it's baked into all of Phantom's SDKs from day one. Your users can switch chains without leaving your app.
Two Paths
Who are you building for?
Phantom's developer platform is organized around a simple question: who's the end user? A human using your app, or an AI agent acting autonomously? The answer determines which integration you reach for.
For human users, you integrate via the Phantom Connect SDKs — React, React Native, or a framework-agnostic Browser SDK. These give you embedded wallets, social login, and native transaction signing right inside your UI.
For AI agents, you use the Phantom MCP Server — a brand-new product that lets any agent with MCP support hold and operate a real Phantom wallet on-chain.
For Human Users
The Phantom Connect SDK suite
Phantom offers three SDKs that cover the full spectrum of web and mobile development. All of them share the same underlying multi-chain architecture — you pick the one that fits your stack.
Hooks-based integration for React web apps. Native transaction support out of the box.
Build mobile wallet experiences for iOS and Android. Same API, native feel.
Framework-agnostic JavaScript. Works with Vue, Svelte, vanilla JS — anything.
Not sure which to use? Phantom provides an SDK comparison guide. As a rule of thumb: reach for the React SDK if you're building a standard web app, React Native if you're targeting mobile, and the Browser SDK if you need flexibility across frameworks.
For AI Agents
The Phantom MCP Server
This is arguably the most exciting thing Phantom has shipped for developers recently. The MCP Server is a first-class Phantom product — think of it as the browser extension, but for AI agents.
What agents can do
📤 Send transactions and sign messages on Solana and EVM chains
💱 Swap tokens — including cross-chain swaps
📊 View balances and rebalance portfolios
🔑 Manage wallet addresses across all supported networks
The MCP Server exposes 13 tools across two capability groups: wallet operations and swaps/portfolio management. Any MCP-compatible agent runtime can connect — including Claude Desktop, Cursor, and Claude Code.
The setup process is straightforward: add the Phantom MCP Server to your agent environment and it handles key management, transaction construction, and chain interactions automatically. Your agent's prompt stays focused on intent, not implementation details.
This opens up genuinely new product categories — autonomous DeFi strategies, AI-assisted portfolio management, or agents that bridge assets across chains on behalf of users.
Getting Started
Resources to hit the ground running
Phantom's docs include a solid set of resources for developers beyond the core SDK and MCP documentation:
Recipes and starter kits give you copy-paste templates for common integration patterns — useful for getting a working prototype running in minutes rather than hours.
The interactive sandbox lets you test your integration live without deploying anything, which is a significant time-saver when you're iterating on transaction flows.
For production support, Phantom has a dedicated developer support request form — notably separate from their general consumer help center, which signals they take the developer experience seriously.
All documentation is available at docs.phantom.com, and there's an llms.txt index at the root for programmatic navigation — handy if you're building tooling on top of the docs.
Bottom Line
What this means for builders
Phantom's developer platform has reached a level of maturity where it's genuinely competitive with any wallet SDK on the market. The multi-chain support, the three-SDK strategy, and especially the MCP Server make it a compelling choice whether you're building a consumer app or an autonomous agent.
The MCP Server in particular is a forward-looking bet that AI agents will increasingly need to interact with on-chain assets — and Phantom is positioning itself as the infrastructure layer for that future. If you're building in the AI x crypto space, it's worth experimenting with now.
Start with the docs, run through the sandbox, and pick the SDK that matches your stack. The path from zero to a working wallet integration is shorter than it's ever been.
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