UNRENT

Official4 tools

by unrent

Reclaim overpaid rent from Solana token accounts (SIMD-0437). Non-custodial, no API key.

xyz.unrent/unrent (MCP Server)

xyz.unrent/unrent is an MCP server for reclaiming overpaid rent from Solana token accounts, referenced as SIMD-0437. It operates in a non-custodial manner and does not require an API key. The server is designed to support automated workflows related to rent reclamation on Solana.

🛠️ Key Features

Reclaim overpaid rent from Solana token accounts
Non-custodial operation
No API key required
Project reference: SIMD-0437

🚀 Use Cases

Recover rent costs tied to Solana token accounts after overpayment
Integrate rent-reclamation steps into developer workflows via MCP

⚡ Developer Benefits

No API key integration needed
Non-custodial approach for rent reclamation tasks

Captured live from the server via tools/list.

get_rent_status

Where Solana's rent reduction (SIMD-0437) stands: the live lamports_per_byte, which of the five steps are live, and when the next is expected. Older accounts keep their higher deposit until it is withdrawn; each step makes more SOL reclaimable.

Parameters

No parameters.

Raw schema

{
  "type": "object",
  "properties": {},
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

scan_wallet

Reads the token accounts and mints of a Solana wallet and returns the SOL that can be reclaimed now: excess rent (WithdrawExcessLamports, accounts stay open), empty token accounts (CloseAccount) and mint excess, the UNRENT service fee, the net amount, a forecast for the remaining rent steps, and tokens that may optionally be burned and closed (dust). Read-only, needs no signature. Amounts are in SOL. Also returns signUrl: a link to finish the reclaim on unrent.xyz with a browser wallet (Phantom, Solflare, Backpack…), for when you cannot sign for the wallet yourself.

Parameters2

wallet	string	required	Solana wallet address (base58).
ref	string	optional	Optional UNRENT referral code. The referrer gets a share of the service fee; the wallet pays the same.

Raw schema

{
  "type": "object",
  "properties": {
    "wallet": {
      "type": "string",
      "description": "Solana wallet address (base58)."
    },
    "ref": {
      "description": "Optional UNRENT referral code. The referrer gets a share of the service fee; the wallet pays the same.",
      "type": "string",
      "maxLength": 32
    }
  },
  "required": [
    "wallet"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

build_reclaim

Re-scans the wallet on the chain and builds the reclaim as unsigned, simulated Solana transactions (base64, versioned). They withdraw excess rent, close empty accounts and pay the service fee as the last instruction; nothing else leaves the wallet. Tokens are only burned for accounts listed in `burn`. The wallet's owner signs every transaction unchanged (the fee payer is the wallet, compute budget instructions may be added) and passes them to submit_reclaim within about 60 seconds, before the blockhash expires. Do not send them yourself.

Parameters5

wallet	string	required	Solana wallet address (base58).
accounts	array	optional	Only these account addresses (from a scan). Default: everything reclaimable.
burn	array	optional	Token accounts to burn and close (from the scan's burn.candidates). Only when the wallet owner explicitly asked for it.
burnMaxUsd	number	optional	Highest USD value per account that may be burned (capped by burn.cleanupMaxUsd). Dust is burned regardless.
ref	string	optional	Optional UNRENT referral code. The referrer gets a share of the service fee; the wallet pays the same.

Raw schema

{
  "type": "object",
  "properties": {
    "wallet": {
      "type": "string",
      "description": "Solana wallet address (base58)."
    },
    "accounts": {
      "description": "Only these account addresses (from a scan). Default: everything reclaimable.",
      "maxItems": 2000,
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "burn": {
      "description": "Token accounts to burn and close (from the scan's burn.candidates). Only when the wallet owner explicitly asked for it.",
      "maxItems": 2000,
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "burnMaxUsd": {
      "description": "Highest USD value per account that may be burned (capped by burn.cleanupMaxUsd). Dust is burned regardless.",
      "type": "number",
      "minimum": 0,
      "maximum": 1000
    },
    "ref": {
      "description": "Optional UNRENT referral code. The referrer gets a share of the service fee; the wallet pays the same.",
      "type": "string",
      "maxLength": 32
    }
  },
  "required": [
    "wallet"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

submit_reclaim

Checks the signed transactions against the ones build_reclaim made (same instructions, same fee, signed by the wallet) and sends them to Solana. Returns the signature and status of every transaction. A claim can be submitted once; after an expired blockhash, build again.

Parameters2

claimId	string	required	claimId from the build.
signed	array	required	The signed transactions, base64, in the order the build returned them.

Raw schema

{
  "type": "object",
  "properties": {
    "claimId": {
      "type": "string",
      "minLength": 10,
      "maxLength": 32,
      "description": "claimId from the build."
    },
    "signed": {
      "minItems": 1,
      "maxItems": 100,
      "type": "array",
      "items": {
        "type": "string",
        "maxLength": 4000
      },
      "description": "The signed transactions, base64, in the order the build returned them."
    }
  },
  "required": [
    "claimId",
    "signed"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

Install

Tools (4)

get_rent_statusscan_walletbuild_reclaimsubmit_reclaim

Remote endpoint

Streamable HTTP

Hosted server - connect over the network, no local install.

url

https://unrent.xyz/mcp

Add to VS Code Add to Cursor

claude_desktop_config.json

json

{
  "mcpServers": {
    "unrent": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://unrent.xyz/mcp"
      ]
    }
  }
}

Desktop config is stdio-only; this bridges via mcp-remote. Native remote: Settings > Connectors.

xyz.unrent/unrent (MCP Server)

🛠️ Key Features

🚀 Use Cases

⚡ Developer Benefits

get_rent_status

scan_wallet

build_reclaim

submit_reclaim

Install

Remote endpoint

Related servers