Unclaimed SOL MCP

The first Vibe Claiming MCP server — let your AI agent scan and reclaim dormant SOL on Solana.

Unclaimed SOL MCP — the first Vibe Claiming MCP server. One server, six reclaim categories: dormant token accounts (incl. Token-2022), spam NFTs, program buffers, deactivated stakes, DeFi rewards, and excess lamports. Read-only scanning with zero config; claiming with dry-run previews, 60-second single-use execution tokens, and local signing. Your keypair never leaves your machine. No seed phrases, ever.

MCP server for UnclaimedSOL — works with AI agents and assistants (Claude, Cursor, Windsurf, Codex CLI, and any Model Context Protocol client).

See also:

• Security model
• Changelog
• npm package
• UnclaimedSOL website

Why agents use this

• Earn, don't just spend — Solana agents pay network fees, but wallets can also hold reclaimable SOL in old accounts, buffers, stakes, and rewards.
• Safe by default — read-only scan mode works with zero config; claiming requires a dry run and a 60-second single-use execution token.
• Local signing — no seed phrases, program allowlist validation, and fee caps before transactions are signed.
• Agent-ready — works in Claude Desktop/Code, Cursor, Windsurf, Codex CLI, and other MCP clients.

Coverage

Coverage as of July 2026:

What it does

Solana wallets accumulate rent-locked SOL in dormant token accounts (including Token-2022), spam NFTs, program buffer accounts, deactivated stakes, DeFi rewards, and excess lamports. This MCP server lets AI agents and assistants:

• Scan any wallet to check for reclaimable SOL in dormant token accounts and program buffers.
• Claim (Vibe Claiming) — burn worthless token balances, close dormant accounts, and reclaim the rent SOL. Signs and broadcasts transactions locally via the UnclaimedSOL on-chain program. Token cleanup lets users keep up to 0.002 SOL per closed account; buffers use a 5% fee.
• Claim rewards — claim uncollected DeFi rewards (cashback, creator fees, etc.). Pump/PumpSwap are 3% capped at 1 SOL or 100 USDC; other rewards are 15%.
• Claim stakes — claim SOL from deactivated stake accounts. 3% fee.

Fees

No funds pass through the MCP server.

Tools

scan_claimable_sol

Annotation title: Scan Wallet for Claimable SOL

Scan a wallet for SOL locked in dormant token accounts (incl. Token-2022) and program buffer accounts. Read-only — no transactions, no keypair needed. DeFi rewards and deactivated stakes are discovered through the claim_rewards and claim_stakes dry runs.

Input: wallet_address (base58 public key; optional in claim-enabled mode, defaults to configured keypair wallet)

claim_sol

Annotation title: Claim Dormant SOL (Vibe Claiming)

Claim reclaimable SOL. Requires a configured keypair. Uses a two-step flow:

1. Dry run (default) — shows a breakdown of reclaimable accounts, estimated SOL, fee, and transaction count. Returns a one-time execution_token valid for 60 seconds.
2. Execute — call again with dry_run: false and the execution_token to sign and broadcast.

Inputs: wallet_address (optional in claim-enabled mode, defaults to configured keypair wallet), dry_run (default true), execution_token, max_transactions (default 10), exclude (optional token symbols/names to skip on execute)

This action is irreversible — closed accounts cannot be recovered.

claim_rewards

Annotation title: Claim DeFi Rewards

Claim uncollected DeFi rewards (cashback, creator fees, and more). Requires a configured keypair. Uses the same two-step dry-run/execute flow as claim_sol. Pump/PumpSwap are 3% capped at 1 SOL or 100 USDC; other rewards are 15%.

Inputs: wallet_address (optional in claim-enabled mode, defaults to configured keypair wallet), dry_run (default true), execution_token

claim_stakes

Annotation title: Claim Deactivated Stakes

Claim SOL from deactivated stake accounts. Requires a configured keypair. Uses the same two-step dry-run/execute flow. Optionally pass specific stake account addresses to claim.

Inputs: wallet_address (optional in claim-enabled mode, defaults to configured keypair wallet), dry_run (default true), execution_token, stake_accounts (optional array)

Example prompts

• "Scan my wallet for reclaimable SOL"
• "How much SOL can I reclaim?"
• "Do a dry run to see what I can claim"
• "Claim my dormant token accounts"
• "Claim rewards for my wallet"
• "Claim my deactivated stakes"
• "How much SOL can I reclaim from <wallet_address>?"
• "Scan <wallet_address> for reclaimable SOL"
• "Every morning, scan my wallet and tell me if there's more than 0.05 SOL to reclaim"
• "Dry-run a full claim and show me the fee breakdown before executing"
• "Claim everything except my BONK accounts"

Setup

Prerequisites

• Node.js 18+
• npm

Quick install (recommended)

No clone/build required if your MCP client supports package commands:

npx -y @unclaimed-sol/mcp

Install and build (alternative)

git clone https://github.com/unclaimed-sol/unclaimed-sol-mcp.git && cd unclaimed-sol-mcp
npm install
npm run build

Configuration

Vibe Claiming mode (recommended)

All tools are exposed (scan_claimable_sol, claim_sol, claim_rewards, claim_stakes). Transactions are signed locally with your keypair and broadcast to the Solana network.

For Claude Desktop / Cursor / Windsurf

Using npm package (recommended):

{
  "mcpServers": {
    "unclaimed-sol": {
      "command": "npx",
      "args": ["-y", "@unclaimed-sol/mcp"],
      "env": {
        "SOLANA_KEYPAIR_PATH": "~/.config/solana/id.json",
        "SOLANA_RPC_URL": "https://your-rpc-provider.com"
      }
    }
  }
}

Using local build:

{
  "mcpServers": {
    "unclaimed-sol": {
      "command": "node",
      "args": ["/absolute/path/to/unclaimed-sol-mcp/dist/index.js"],
      "env": {
        "SOLANA_KEYPAIR_PATH": "~/.config/solana/id.json",
        "SOLANA_RPC_URL": "https://your-rpc-provider.com"
      }
    }
  }
}

For Claude Code

Using npm package (recommended):

claude mcp add unclaimed-sol \
  -e SOLANA_KEYPAIR_PATH=~/.config/solana/id.json \
  -e SOLANA_RPC_URL=https://your-rpc-provider.com \
  -- npx -y @unclaimed-sol/mcp

Using local build:

claude mcp add unclaimed-sol \
  -e SOLANA_KEYPAIR_PATH=~/.config/solana/id.json \
  -e SOLANA_RPC_URL=https://your-rpc-provider.com \
  -- node /absolute/path/to/unclaimed-sol-mcp/dist/index.js

For Codex CLI

Using npm package (recommended):

codex mcp add unclaimed-sol \
  --env SOLANA_KEYPAIR_PATH=~/.config/solana/id.json \
  --env SOLANA_RPC_URL=https://your-rpc-provider.com \
  -- npx -y @unclaimed-sol/mcp

Using local build:

codex mcp add unclaimed-sol \
  --env SOLANA_KEYPAIR_PATH=~/.config/solana/id.json \
  --env SOLANA_RPC_URL=https://your-rpc-provider.com \
  -- node /absolute/path/to/unclaimed-sol-mcp/dist/index.js

Optional scan-only mode (no keypair)

Only the scan_claimable_sol tool is exposed. No transactions are signed or sent.

Using npm package:

{
  "mcpServers": {
    "unclaimed-sol": {
      "command": "npx",
      "args": ["-y", "@unclaimed-sol/mcp"]
    }
  }
}

Using local build:

{
  "mcpServers": {
    "unclaimed-sol": {
      "command": "node",
      "args": ["/absolute/path/to/unclaimed-sol-mcp/dist/index.js"]
    }
  }
}

Verify installation

• Claude Code: claude mcp list and confirm unclaimed-sol is present.
• Codex CLI: codex mcp list and confirm unclaimed-sol is present.
• Smoke test: ask your assistant to run scan wallet <your_wallet> and confirm scan_claimable_sol executes.

Troubleshooting

• If tools do not appear, restart your MCP client after config changes.
• If using local build, ensure dist/index.js exists (npm run build) and path is absolute.
• If claim tools are missing, confirm SOLANA_KEYPAIR_PATH (or SOLANA_PRIVATE_KEY) is set.

Environment variables

Security

• HTTPS enforced — Claim mode requires HTTPS for the API URL (HTTP only allowed for localhost).
• API URL allowlist — Claim mode only connects to unclaimedsol.com, localhost, or 127.0.0.1.
• Pre-sign validation — Every transaction is validated before signing: program allowlist, exact instruction account layouts pinned to locally-derived PDAs, fee cap enforcement, and per-transaction claim requirement. For stakes, fee caps are derived from proven on-chain withdraw amounts. For rewards, fee caps are cross-checked against an independent scan (see trust model below).
• Execution tokens — Claims require a dry run first. Tokens are single-use, single-wallet, and expire in 60 seconds.
• Keypair stays local — Your private key never leaves your machine. Transactions are signed locally.
• Safety filtering — Token accounts are filtered server-side (maxClaimMode: false) to exclude valuable tokens and NFTs. Frozen accounts are skipped.
• Request timeouts — All API calls have a 15-second timeout.

How claiming works

Token/buffer claims (claim_sol)

1. The MCP server calls the UnclaimedSOL backend to fetch reclaimable token and buffer accounts.
2. Instructions are built using the @unclaimedsol/spl-burn-close-sdk — token balances are burned and accounts are closed via the UnclaimedSOL on-chain program.
3. Transactions are signed locally with your keypair and broadcast to the Solana network.
4. The on-chain program collects recovered token-account rent above 0.002 SOL per successfully closed account, plus 5% for buffers. No funds pass through the MCP server.

Rewards claims (claim_rewards)

1. The backend builds unsigned transactions containing DeFi reward claim instructions and a fee transfer.
2. The MCP validates every instruction: exact account layouts, discriminators, and locally-derived PDAs. Fee is capped at 15% of an independently-scanned reward total, while Pump/PumpSwap pricing is expected to be lower.
3. Transactions are signed locally and broadcast.

Stake claims (claim_stakes)

1. The backend builds unsigned transactions containing Stake Withdraw instructions and a fee transfer.
2. The MCP validates every instruction: withdraw-only, exact account counts, and fee capped at 3% of proven withdraw amounts extracted from instruction data.
3. Transactions are signed locally and broadcast.

Validator trust model

The pre-sign validator (validateTransactionPrograms) provides different levels of protection depending on the claim type:

• claim_sol — Instructions are built locally using the SDK. The validator checks program IDs and fee vault presence.
• claim_stakes — Full value-level safety. Withdraw amounts are proven from Stake instruction data. The fee cap is locally derived and does not depend on any backend-reported value.
• claim_rewards — Structural safety. DeFi reward claim amounts are determined on-chain at execution time and are not encoded in instruction data. The fee cap is cross-checked against an independent /scan call, which protects against accidental drift between backend endpoints but not against a fully compromised backend.

In all cases: instruction shapes are pinned exactly (every account position verified against locally-derived PDAs, exact account counts, known discriminators only).

Project structure

src/
  index.ts              MCP server entry point (stdio transport)
  constants.ts          Program IDs, fee vault, fee caps, batching limits
  config.ts             Environment variable loading and validation
  validation.ts         Wallet address validation
  formatter.ts          SOL display formatting
  cache.ts              In-memory scan cache (60s TTL)
  execution-token-store.ts  Generic two-step dry-run/execute token management
  tools/
    scan.ts             scan_claimable_sol tool handler
    claim.ts            claim_sol tool handler (tokens + buffers)
    claim-rewards.ts    claim_rewards tool handler (DeFi rewards)
    claim-stakes.ts     claim_stakes tool handler (deactivated stakes)
  services/
    scanner.ts          Backend API client (scan, tokens, buffers, rewards, stakes)
    transaction.ts      Transaction building + pre-sign validation
    signer.ts           Batch sign, send, confirm with retry

License

MIT