Claude Code Plugin

Install the official Helius plugin for Claude Code — the Helius MCP server plus expert Solana skills, giving Claude live blockchain access in one step.

Helius is the first, and currently the only, crypto company with an official Claude Code plugin listed in Anthropic’s plugin directory. The plugin bundles everything you need to build on Solana in one install — the Helius MCP server for live blockchain access, expert skills that guide Claude’s behavior, and deep reference files for every Helius product.

Helius MCP Server

Auto-starts helius-mcp — 10 routed tools for querying the blockchain, sending transactions, managing webhooks, and more

Expert Skills

All skills, in one place, making Claude a Solana expert running on Solana’s fastest infrastructure provider

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Install

Inside Claude Code, add the Helius marketplace:

/plugin marketplace add helius-labs/core-ai

Then install the plugin:

/plugin install helius@helius-labs

Run these as two separate commands — /plugin marketplace add prompts for the marketplace source on its own, so pasting both lines at once will fail.

The same steps work from your shell with claude plugin marketplace add helius-labs/core-ai followed by claude plugin install helius@helius-labs.

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Local Testing

git clone https://github.com/helius-labs/core-ai.git
claude --plugin-dir ./core-ai/helius-plugin

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What’s Included

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MCP Server

The plugin auto-starts one MCP server when Claude Code launches:

Server	Transport	What It Provides
Helius (helius-mcp@3.0.0)	stdio	10 routed tools (heliusAccount, heliusWallet, heliusAsset, heliusTransaction, heliusChain, heliusStreaming, heliusKnowledge, heliusWrite, heliusCompression, expandResult) covering DAS API, RPC, webhooks, streaming, wallet analysis, onboarding, Solana knowledge, and docs

The plugin doesn’t include DFlow’s MCP server. The DFlow skill works without it. To add it, see the DFlow skill’s prerequisites.

The plugin pins helius-mcp to an exact version, currently 3.0.0, rather than @latest. A new plugin release advances the pin. A standalone setup with npx helius-mcp@latest always runs the latest version.

See Helius MCP for the full tool catalog.

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Skills

Skill	Invoke	What It Does
Build	/helius:build	Makes Claude an expert Solana developer. Routes to the right tools and reference files for DAS, Sender, WebSockets, LaserStream, Webhooks, Wallet API, and more.
Phantom	/helius:phantom	Makes Claude an expert at building frontend dApps. Covers Phantom Connect SDK (React, React Native, browser), token gating, NFT minting, payments, and secure frontend architecture.
Jupiter	/helius:jupiter	Makes Claude an expert at building DeFi apps. Combines Jupiter APIs (swaps, lending, limit orders, DCA) with Helius infrastructure.
DFlow	/helius:dflow	Makes Claude an expert at building trading apps. Combines DFlow APIs (spot swaps, prediction markets, streaming, KYC) with Helius infrastructure.
OKX	/helius:okx	Makes Claude an expert at building trading and intelligence apps. Composes OKX DEX aggregation, smart money signals, and meme analysis with Helius infrastructure.
SVM	/helius:svm	Solana protocol expert. Explains architecture, consensus, execution engine, account model, and validator economics using live sources.

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Reference Files

Deep documentation bundled with each skill that Claude reads before writing code — covering DAS API, Sender, Priority Fees, Webhooks, WebSockets, LaserStream, Wallet API, Enhanced Transactions, Onboarding, Phantom Connect SDK (React, React Native, browser), token gating, NFT minting, payments, frontend security, Jupiter (Swap V2, Lend, Trigger, Recurring, Perps, Predictions, tokens/prices, Plugin), DFlow spot trading and prediction markets, OKX DEX aggregation and intelligence, and integration patterns.

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API Key Setup

The plugin auto-starts the MCP server, but you still need a Helius API key. On first use, Claude guides you through one of these paths:

Existing Key

If you already have a key from dashboard.helius.dev, have Claude call the setHeliusApiKey action on heliusAccount:

Just tell Claude: “Set my Helius API key to YOUR_API_KEY”

Signup

Create a new account from Claude Code via a hosted payment link or autopay. Each step is an action on heliusAccount:

1. Claude calls heliusAccount with action: "generateKeypair" — creates a Solana wallet
2. Claude calls heliusAccount with action: "signup" and mode: "link" — returns a payment URL you open in a browser to pay with any wallet (or mode: "autopay" to pay USDC from the local keypair automatically)
3. After paying via link, Claude calls heliusAccount with action: "signup" and mode: "resume" — finalizes provisioning and configures the API key automatically

Every new signup, including the Agent plan, requires your email, first name, and last name. The wallet is only used to pay.

CLI

Use the Helius CLI from the terminal:

npx helius-cli@latest keygen
npx helius-cli@latest signup --plan agent --email [e-mail] --first-name Jane --last-name Doe   # Print hosted payment link
# (pay in browser, then:)
npx helius-cli@latest signup --resume         # Finalize account
# Or autopay from the local keypair:
npx helius-cli@latest signup --plan agent --pay --email [e-mail] --first-name Jane --last-name Doe

DFlow API key: REST dev endpoints work without a key (rate-limited). For production or WebSocket access, get a key from pond.dflow.net/build/api-key.

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Usage

Once installed, ask questions in plain English. Claude picks the right tools and reads the right reference files automatically:

• “Build a swap interface using DFlow and Helius Sender”
• “What NFTs does this wallet own?”
• “Set up webhooks to monitor my wallet for incoming transfers”
• “Parse this transaction: 5abc...”
• “Build a portfolio viewer that shows tokens after connecting Phantom”
• “Send 1 SOL to Gh9ZwEm...”
• “Create a prediction market trading UI”

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Plugin Structure

The plugin contains a manifest, an MCP config, and a skills/ directory:

Path	Purpose
.claude-plugin/plugin.json	Plugin manifest (name: "helius")
.mcp.json	Auto-start config for the Helius MCP server
skills/build/	/helius:build — SKILL.md + 9 Helius product reference files
skills/phantom/	/helius:phantom — SKILL.md + 16 reference files (Phantom + Helius)
skills/jupiter/	/helius:jupiter — SKILL.md + 16 reference files (Jupiter + Helius)
skills/dflow/	/helius:dflow — SKILL.md + 12 reference files (DFlow + Helius)
skills/okx/	/helius:okx — SKILL.md + integration patterns (OKX + Helius)
skills/svm/	/helius:svm — SKILL.md + 10 architecture reference files

Browse the full source on GitHub.

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Learn More

Helius MCP

Full tool catalog and standalone MCP setup

Build Skill

Core Solana development skill details

DFlow Skill

Trading skill details and composite workflows

GitHub

Source code and issue tracking