Everything
in one place.

claude mcp add --transport http unrent https://unrent.xyz/mcp

{
  "mcpServers": {
    "unrent": { "type": "http", "url": "https://unrent.xyz/mcp" }
  }
}

Tools

get_rent_status

Read-only

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 Older accounts keep their higher deposit until it is withdrawn; each step makes more SOL reclaimable.

scan_wallet

Read-only

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.

build_reclaim

Prepares, sends nothing

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.

submit_reclaim

Sends transactions

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.

curl -s https://unrent.xyz/mcp \
  -H 'content-type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call",
       "params":{"name":"scan_wallet","arguments":{"wallet":"<address>"}}}'

GET/rent-status

Live lamports_per_byte and the five SIMD-0437 steps.

free

POST/scan

Reclaimable SOL of one wallet: excess, empty accounts, mint excess, fee, net, forecast, burn candidates, signUrl.

$0.002

POST/portfolio

Up to 25 wallets in one request: reclaimable, fee and net SOL per wallet and in total.

$0.02

POST/reclaim/build

Unsigned, simulated reclaim transactions (base64) and a claimId.

free

POST/reclaim/submit

Checks the signed transactions against the build and sends them.

free

curl -s https://unrent.xyz/api/v1/rent-status

# Without payment: 402 with the price (MPP and x402 offers)
curl -i -X POST https://unrent.xyz/api/v1/scan \
  -H 'content-type: application/json' -d '{"wallet":"<address>"}'

# With the pay CLI (https://pay.sh): pays the 402 in USDC and repeats the request
pay curl -X POST https://unrent.xyz/api/v1/scan \
  -H 'content-type: application/json' -d '{"wallet":"<address>"}'

curl -s -X POST https://unrent.xyz/api/v1/reclaim/build \
  -H 'content-type: application/json' -d '{"wallet":"<address>"}'
# → { "claimId": "…", "transactions": ["<base64>", …], "summary": { … } }

curl -s -X POST https://unrent.xyz/api/v1/reclaim/submit \
  -H 'content-type: application/json' \
  -d '{"claimId":"…","signed":["<signed base64>", …]}'
# → { "status": "confirmed", "transactions": [{ "signature": "…", "explorer": "…" }] }

Rate limits are per IP and minute, shared with the site and MCP; a 429 says when to retry. Inputs are checked before payment, and a full scan queue answers 503, so nobody pays for an error.

import {
  getBase64EncodedWireTransaction, getBase64Encoder,
  getTransactionDecoder, signTransaction
} from '@solana/kit';

const signed = await Promise.all(
  built.transactions.map(async (b64) => {
    const tx = getTransactionDecoder().decode(getBase64Encoder().encode(b64));
    return getBase64EncodedWireTransaction(await signTransaction([signer.keyPair], tx));
  })
);

import { VersionedTransaction } from '@solana/web3.js';

const signed = built.transactions.map((b64) => {
  const tx = VersionedTransaction.deserialize(Buffer.from(b64, 'base64'));
  tx.sign([keypair]);
  return Buffer.from(tx.serialize()).toString('base64');
});

A browser wallet signs the same bytes through Wallet Standard solana:signTransaction (sign only, not sign-and-send).