# Phantom Developer Documentation

> Phantom is a leading crypto wallet for Solana, Ethereum, Bitcoin, Base, and Polygon. Monad support has been deprecated, and Sui support will be deprecated on September 24, 2026. This documentation covers two main integration paths: the Phantom MCP server (giving AI agents a wallet) and Phantom Connect SDKs (building apps with embedded wallets and social login).

## Getting Started

Start here to understand what Phantom offers and choose the right integration path.

- [Build with Phantom](https://docs.phantom.com/introduction): Overview of Phantom developer tools — routes to either the MCP server (AI agents) or Connect SDKs (app users)
- [Phantom Connect](https://docs.phantom.com/phantom-connect): Onboard users with embedded wallets using Google or Apple social login, or connect existing Phantom extension wallets
- [SDK Overview](https://docs.phantom.com/wallet-sdks-overview): Compare React, React Native, and Browser SDKs — includes feature matrix and platform guidance

## Phantom MCP server

The Phantom MCP server (`@phantom/mcp-server`) gives AI agents a Phantom wallet. Agents can sign transactions, transfer tokens, swap with no fees, and interact on-chain across Solana, Ethereum, Bitcoin, and Sui. Monad support has been deprecated, and Sui support will be deprecated on September 24, 2026. Do not start new Sui integrations. It's a Phantom wallet product for users who interact through AI agents. Phantom does not charge transaction fees, platform fees, or commission on swaps.

- [Phantom MCP Server Overview](https://docs.phantom.com/phantom-mcp-server): What the MCP server is, quick install, available tools, and supported clients (Claude Desktop, Cursor, Claude Code)
- [Setup and Reference](https://docs.phantom.com/phantom-mcp-server/setup): Full installation guide, prerequisites (Phantom Portal App ID), environment variables, all 25 tools with parameters, supported networks, session management, and troubleshooting

## Quickstarts

Step-by-step guides to get a working Phantom Connect integration running in minutes.

- [Next.js Quickstart](https://docs.phantom.com/recipes/quickstarts/nextjs): Full setup guide for Next.js App Router including provider config, auth callback, and portal setup
- [React (Vite) Quickstart](https://docs.phantom.com/recipes/quickstarts/react): Full setup guide for React with Vite including provider config and routing
- [Vanilla JavaScript Quickstart](https://docs.phantom.com/recipes/quickstarts/vanilla-js): Plain JavaScript integration using the Browser SDK with event listeners and callbacks
- [React Native Quickstart](https://docs.phantom.com/recipes/quickstarts/react-native): Mobile app setup including dependencies, app scheme, polyfills, and wallet screen

## Recipes

Copy-paste code examples for the most common Phantom Connect integration patterns.

### Authentication

- [Social Login (Google, Apple)](https://docs.phantom.com/recipes/auth/social-login): Let users sign in with Google or Apple and automatically receive an embedded wallet — includes React, Browser SDK, and React Native examples
- [Browser Extension Login](https://docs.phantom.com/recipes/auth/extension-login): Connect to existing Phantom browser extension wallets with fallback handling
- [Session Management](https://docs.phantom.com/recipes/auth/session-management): Persist wallet connections across page reloads using the SDK's automatic session persistence
- [Sign-in with Solana (SIWS)](https://docs.phantom.com/recipes/auth/sign-in-with-solana): Wallet-based authentication — user signs a message, backend verifies the signature to prove ownership

### Payments

- [Send SOL](https://docs.phantom.com/recipes/payments/send-sol): Transfer native SOL tokens using SystemProgram transfer instruction
- [Send USDC](https://docs.phantom.com/recipes/payments/send-usdc): Transfer USDC stablecoin payments with automatic recipient token account creation
- [Send any SPL Token](https://docs.phantom.com/recipes/payments/send-spl-token): Transfer any SPL token by mint address and decimals, including token account creation
- [Request Payment](https://docs.phantom.com/recipes/payments/request-payment): Generate payment request links and QR codes using the Solana Pay standard

### Signatures

- [Sign a Message](https://docs.phantom.com/recipes/signatures/sign-message): Request a signature from the connected wallet for authentication or verification
- [Verify a Signature](https://docs.phantom.com/recipes/signatures/verify-signature): Server-side signature verification using tweetnacl and bs58 to prove wallet ownership
- [Sign Typed Data (EIP-712)](https://docs.phantom.com/recipes/signatures/sign-typed-data): Sign structured, human-readable data on Ethereum/EVM chains

### Wallet Operations

- [Check Wallet Balance](https://docs.phantom.com/recipes/wallet-operations/check-balance): Fetch SOL and SPL token balances for a connected wallet using the Solana Connection API
- [Get All Token Accounts](https://docs.phantom.com/recipes/wallet-operations/get-token-accounts): List all SPL token accounts and balances for a wallet to display a portfolio

### Transactions

- [Add Priority Fees](https://docs.phantom.com/recipes/transactions/add-priority-fees): Add ComputeBudgetProgram instructions for faster confirmation during network congestion
- [Check Transaction Status](https://docs.phantom.com/recipes/transactions/check-transaction-status): Poll and monitor transaction confirmation status (pending, confirmed, finalized)

## Phantom Connect SDKs

Build wallet-connected apps with React, React Native, or framework-agnostic JavaScript. All SDKs support social login (Google, Apple), browser extension connection, and multi-chain operations.

### React SDK

- [React SDK](https://docs.phantom.com/sdks/react-sdk): Install `@phantom/react-sdk`, wrap your app in `PhantomProvider`, and use hooks like `useConnect`, `useAccounts`, `useSolana`, and `useEthereum`
- [Connect](https://docs.phantom.com/sdks/react-sdk/connect): Wallet connection methods — Google, Apple, and extension providers with `useConnect` hook
- [Sign Messages](https://docs.phantom.com/sdks/react-sdk/sign-messages): Message signing for authentication using `useSolana` and `useEthereum` hooks
- [Sign and Send Transactions](https://docs.phantom.com/sdks/react-sdk/sign-and-send-transaction): Transaction signing and broadcasting with chain-specific hooks

### React Native SDK

- [React Native SDK](https://docs.phantom.com/sdks/react-native-sdk): Install `@phantom/react-native-sdk` with Expo dependencies, configure app scheme, and add required polyfills
- [Connect](https://docs.phantom.com/sdks/react-native-sdk/connect): Mobile wallet connection with OAuth providers and connection modal UI
- [Sign Messages](https://docs.phantom.com/sdks/react-native-sdk/sign-messages): Message signing on mobile with hardware-backed key security
- [Sign and Send Transactions](https://docs.phantom.com/sdks/react-native-sdk/sign-and-send-transaction): Mobile transaction handling with system browser authentication

### Browser SDK

- [Browser SDK](https://docs.phantom.com/sdks/browser-sdk): Install `@phantom/browser-sdk` and use `createPhantom()` for framework-agnostic wallet integration
- [Connect](https://docs.phantom.com/sdks/browser-sdk/connect): Browser-based wallet connection with `phantom.connect({ provider })` for Google, Apple, or the Phantom browser extension (injected)
- [Sign Messages](https://docs.phantom.com/sdks/browser-sdk/sign-messages): Message signing via `phantom.solana.signMessage()` and `phantom.ethereum.signPersonalMessage()`
- [Sign and Send Transactions](https://docs.phantom.com/sdks/browser-sdk/sign-and-send-transaction): Transaction handling with `phantom.solana.signAndSendTransaction()` and `phantom.ethereum.sendTransaction()`

### Guides

- [Wallet Authentication with JWTs](https://docs.phantom.com/sdks/guides/wallet-authentication-with-jwts): Implement custom JWT-based authentication using wallet signatures for backend verification

## Phantom Portal

Self-service dashboard for registering your app, configuring allowed origins, and managing branding within Phantom.

- [Portal Overview](https://docs.phantom.com/phantom-portal/portal): Dashboard for app configuration, branding, access modes (DISABLED, PRIVATE, PUBLIC), and domain verification
- [Get Started](https://docs.phantom.com/phantom-portal/getting-started): Six-step setup guide from account creation through App ID retrieval
- [Create an Account](https://docs.phantom.com/phantom-portal/create-account): Sign up with Google or Apple
- [Create an App](https://docs.phantom.com/phantom-portal/create-app): Register your application and configure networks
- [Verify Your Domain](https://docs.phantom.com/phantom-portal/verify-domain): DNS-based domain verification required for public listing in Phantom
- [Configure URLs](https://docs.phantom.com/phantom-portal/configure-urls): Set allowed origins and redirect URLs for your SDK integration
- [Add App Information](https://docs.phantom.com/phantom-portal/edit-app-info): Configure icon, cover image, description, and branding metadata
- [Get Your App ID](https://docs.phantom.com/phantom-portal/get-app-id): Obtain the `appId` credential required by all Phantom Connect SDKs

## Browser Extension — Solana

Integrate directly with the Phantom browser extension for Solana using the injected `window.phantom.solana` provider.

- [Get Started with Solana](https://docs.phantom.com/solana/integrating-phantom): Solana integration overview and architecture
- [Detect the Provider](https://docs.phantom.com/solana/detecting-the-provider): Check if Phantom is installed via `window.phantom?.solana?.isPhantom`
- [Establish a Connection](https://docs.phantom.com/solana/establishing-a-connection): Call `provider.connect()` to request the user's public key
- [Send a Legacy Transaction](https://docs.phantom.com/solana/sending-a-transaction): Build and send transactions using `@solana/web3.js` Transaction class
- [Send a Versioned Transaction](https://docs.phantom.com/solana/sending-a-transaction-1): Versioned transactions with Address Lookup Tables for larger account sets
- [Sign a Message](https://docs.phantom.com/solana/signing-a-message): Arbitrary message signing for authentication and verification
- [Error Messages and Codes](https://docs.phantom.com/solana/errors): Solana error codes reference (4001, 4100, etc.)

## Browser extension — EVM networks

Integrate with Phantom on EVM networks using the EIP-1193 standard provider at `window.phantom.ethereum`. This guide covers Ethereum, Base, Polygon, and Robinhood Chain. Robinhood Chain uses chain ID `4663` (`0x1237`) on mainnet and `46630` (`0xb626`) on testnet. Testnet Mode is required for testnets. Monad support has been deprecated.

- [Get Started with EVM](https://docs.phantom.com/ethereum-monad-testnet-base-and-polygon/getting-started): EVM integration overview, network IDs covered by the guide, and Monad deprecation guidance
- [Detect the Provider](https://docs.phantom.com/ethereum-monad-testnet-base-and-polygon/detecting-the-provider): Check for Phantom via `window.phantom?.ethereum?.isPhantom`
- [Establish a Connection](https://docs.phantom.com/ethereum-monad-testnet-base-and-polygon/establishing-a-connection): Request accounts via `eth_requestAccounts` RPC method
- [Send a Transaction](https://docs.phantom.com/ethereum-monad-testnet-base-and-polygon/sending-a-transaction): Send EVM transactions via `eth_sendTransaction`
- [Sign a Message](https://docs.phantom.com/ethereum-monad-testnet-base-and-polygon/signing-a-message): EVM message signing with `personal_sign`
- [Provider API Reference](https://docs.phantom.com/ethereum-monad-testnet-base-and-polygon/provider-api-reference): Complete EVM provider API — properties, events, methods, and error codes

## Browser Extension — Bitcoin (deprecated)

The `window.phantom.bitcoin` injected provider has been deprecated.

- [Get Started with Bitcoin](https://docs.phantom.com/bitcoin/integrating-phantom): Bitcoin integration overview
- [Detect the Provider](https://docs.phantom.com/bitcoin/detecting-the-provider): Check for Phantom via `window.phantom?.bitcoin?.isPhantom`
- [Establish a Connection](https://docs.phantom.com/bitcoin/establishing-a-connection): Call `provider.requestAccounts()` for Bitcoin address
- [Send a Transaction](https://docs.phantom.com/bitcoin/sending-a-transaction): Bitcoin transaction construction and sending
- [Sign a Message](https://docs.phantom.com/bitcoin/signing-a-message): Bitcoin message signing
- [Provider API Reference](https://docs.phantom.com/bitcoin/provider-api-reference): Complete Bitcoin provider API reference

## Browser Extension — Sui (deprecating September 24, 2026)

Sui support through `window.phantom.sui` will be deprecated on September 24, 2026. Do not start new Sui integrations. Existing integrations can continue during the transition.

- [Get Started with Sui](https://docs.phantom.com/sui/getting-started-with-sui): Sui deprecation timeline and transition guidance
- [Detect the Provider](https://docs.phantom.com/sui/detecting-the-provider): Check for Phantom via `window.phantom?.sui?.isPhantom`
- [Establish a Connection](https://docs.phantom.com/sui/establishing-a-connection): Connect to Sui wallet
- [Send a Transaction](https://docs.phantom.com/sui/sending-a-transaction): Sui transaction handling
- [Sign a Message](https://docs.phantom.com/sui/signing-a-message): Sui message signing

## Mobile Deep Links

iOS and Android native apps can interact with Phantom through universal links (`https://phantom.app/ul/v1/<method>`). Currently Solana only.

- [Deep Links Overview](https://docs.phantom.com/phantom-deeplinks/deeplinks-ios-and-android): Protocol format, supported methods, and universal link vs custom scheme comparison
- [Handle Sessions](https://docs.phantom.com/phantom-deeplinks/handling-sessions): Session structure, validation with base58 and cryptographic signatures
- [Specifying Redirects](https://docs.phantom.com/phantom-deeplinks/specifying-redirects): HTTPS URL redirects vs custom scheme URIs for redirect_link parameters
- [Encryption](https://docs.phantom.com/phantom-deeplinks/encryption): Symmetric key encryption and Diffie-Hellman key exchange for secure communications
- [Limitations](https://docs.phantom.com/phantom-deeplinks/limitations): Android 500KB limit, iOS 1MB limit

## Developer Tools

AI tools, testing, and debugging resources for building with Phantom.

- [AI-Assisted Development](https://docs.phantom.com/developer-powertools/ai-tools): Use Phantom's MCP servers and Cursor AI prompts to generate production-ready SDK code
- [Phantom MCP Server Setup](https://docs.phantom.com/phantom-mcp-server/setup): MCP server that gives AI agents direct access to Phantom wallet operations (sign transactions, transfer tokens, view addresses)
- [Phantom Connect SDK MCP Server](https://docs.phantom.com/resources/mcp-server): Model Context Protocol server for AI coding assistants — search Phantom docs from Cursor, Claude Code, or VS Code
- [Cursor AI Prompts](https://docs.phantom.com/resources/cursor-prompts): One-shot prompts for generating React, React Native, and Browser SDK implementations
- [Testnet Mode](https://docs.phantom.com/developer-powertools/testnet-mode): Access supported test networks, including Solana devnet/testnet, Ethereum Sepolia, Polygon Amoy, Base Sepolia, and Robinhood Chain Testnet
- [Mobile Web Debugging](https://docs.phantom.com/developer-powertools/mobile-web-debugging): Debug mobile web dapps using Safari (iOS) and Chrome (Android)
- [Wallet Standard](https://docs.phantom.com/developer-powertools/wallet-standard): Chain-agnostic Wallet Standard interface integration for Solana dapps

## Security and Advanced Features

- [Domain and Transaction Warnings](https://docs.phantom.com/developer-powertools/domain-and-transaction-warnings): Understanding new domain warnings, app identity verification warnings, transaction simulation warnings, and how to resolve them
- [Transaction Validation](https://docs.phantom.com/developer-powertools/lighthouse): Lighthouse assertion instructions for runtime transaction validation
- [Sign-In-With Standards](https://docs.phantom.com/developer-powertools/sign-in-with-standards): SIWS (Solana), SIWE (EIP-4361), and SIWx (CAIP-122) authentication standards
- [Solana Priority Fees](https://docs.phantom.com/developer-powertools/solana-priority-fees): How Phantom auto-calculates priority fees based on compute units and congestion
- [Solana Versioned Transactions](https://docs.phantom.com/developer-powertools/solana-versioned-transactions): Address Lookup Tables enabling up to 256 accounts per transaction
- [Solana Token Extensions (Token22)](https://docs.phantom.com/developer-powertools/solana-token-extensions-token22): Token-2022 program support for interest-bearing, transfer fees, and metadata extensions
- [Solana Actions and Blinks](https://docs.phantom.com/developer-powertools/solana-actions-and-blinks): Blockchain links rendered on Twitter/X for direct transaction execution

## Best Practices

- [Go-Live Checklist](https://docs.phantom.com/best-practices/go-live-checklist): Pre-launch verification covering Portal setup, integration testing, and security checks
- [Display Apps in Dialogs](https://docs.phantom.com/best-practices/display-apps-within-dialogs): How Phantom reads Open Graph tags and favicon for dialog branding
- [Token Display](https://docs.phantom.com/best-practices/tokens): Token metadata, verification, and display for fungibles, NFTs, and semi-fungibles

## Resources

- [FAQ](https://docs.phantom.com/resources/faq): Common questions about Phantom Connect, embedded vs extension wallets, SDK selection, and Robinhood Chain support through the traditional EVM provider
- [Demo Apps](https://docs.phantom.com/resources/sandbox): Multi-chain sandbox on CodeSandbox, Solana-only sandbox, and React Native deep link demo
- [Logos and Assets](https://docs.phantom.com/resources/logos-and-assets): Phantom brand assets for your integration

## Optional

- [Updates](https://docs.phantom.com/updates): Changelog and release notes
- [User Limits](https://docs.phantom.com/user-limits): Access modes (PRIVATE, PUBLIC, DISABLED) and team member limits