Give your AI agent eyes on Solana. Rigel is an open-source MCP server that connects Claude Desktop, Claude Code, Cursor, and any stdio MCP client to the Solana blockchain and the pump.fun ecosystem.

Read-only by design. No private keys, no signing, no custody — the only configuration is which RPC to read from.

Tools

Tool	Input	Returns
`rigel_get_wallet_balance`	`walletAddress`	SOL balance + major SPL token holdings
`rigel_inspect_token_data`	`tokenAddress`	Metadata, supply, bonding-curve SOL, curve completion %
`rigel_analyze_rug_risk`	`tokenAddress`	Mint/freeze authority status, top-holder concentration, risk rating
`rigel_check_first_buyers`	`tokenAddress`	Bundle detection: fresh-wallet holders, shared funding wallets, supply concentration
`rigel_deployer_history`	`tokenAddress`	Deployer rap sheet: who launched it, wallet age, activity, remaining bag
`rigel_market_snapshot`	`tokenAddress`	Live price, market cap, liquidity, volume, buys/sells flow, momentum read
`rigel_full_audit`	`tokenAddress`	The whole battery in one call, with a combined verdict and top reasons

Quick start (Claude Desktop)

Paste into claude_desktop_config.json and restart Claude:

{
  "mcpServers": {
    "rigel-solana": {
      "command": "npx",
      "args": ["-y", "@rigel-protocol/solana-mcp"],
      "env": { "SOLANA_RPC_URL": "https://api.mainnet-beta.solana.com" }
    }
  }
}

Then ask your agent things like:

"What's in this wallet? FC5i…"
"Inspect this pump.fun token: 7xKq…"
"Is this token a rug?"

Build from source

npm install
npm run build
node dist/index.js   # speaks MCP over stdio

Configuration

Env var	Default	Purpose
`SOLANA_RPC_URL`	`https://api.mainnet-beta.solana.com`	Any Solana RPC — public, Helius, Triton, or your own node

The public mainnet RPC rate-limits aggressively; a free Helius key is recommended for heavy use.

Security posture

No private keys, seed phrases, or signing code anywhere in this codebase.
Local stdio transport — queries go from your machine to your RPC, nothing in between.
Logs go to stderr; stdout is reserved for MCP protocol traffic.
Zod-validated inputs; friendly errors for invalid public keys and RPC failures.

Disclaimer

Rigel reports on-chain facts. The rug-risk rating is a heuristic over public data (authority status, holder concentration) — it cannot detect every risk, and nothing it outputs is financial advice.