Castle Finance - Power DeFi Solana

Castle Finance — Solana DeFi Agent Execute DeFi operations on Solana directly through AI agents.

CommunityOnlineNo sign-inGlobalFreeCan modify data

What it can do

  • Ping: Free – health check
  • Info: Free – server metadata
  • Swap: Swap via Jupiter DEX. 0.001 USDC/call.

What data it sees

Do you need an account

No: the server works without sign-in

Castle Finance — Solana DeFi Agent

Execute DeFi operations on Solana directly through AI agents. Swap, portfolio, yield, and real-time pool data — all pay-per-use via x402.

Features

🆓 Free (data)

  • scan-pools — Search DEX pools by token (Raydium, Orca, Meteora)
  • pool-data — Detailed pool data (TVL, volume, liquidity)
  • top-pools — Top pools by TVL with DEX filter
  • slippage-check — Slippage estimation via Jupiter

💰 Paid (0.001 USDC/call via x402)

  • swap — Token swaps via Jupiter Aggregator
  • portfolio-balance — Any Solana wallet balances
  • yield-optimize — Yield optimization across Meteora vaults

Payment (x402)

No subscription. No token. Pay per call:

  1. Call the tool → receive a challenge
  2. Send 0.001 USDC to the Castle Finance treasury wallet
  3. Sign the challenge with your Solana wallet
  4. Retry with the proof — execution is released

Network: Solana
Currency: USDC (EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v)
Price: 0.001 USDC per paid tool call

Data Sources

Pool data via DexScreener (real-time, no API key required).
Quotes and routes via Jupiter API.
Execution via Jupiter + Meteora (Cloudflare Worker).

Audience

  • Automated trading agents
  • DAO treasury management
  • Yield farming bots
  • Personal DeFi assistants
  • Agent-to-agent payments

How to connect

How to connect Castle Finance - Power DeFi Solana to Claude

The server address to paste into Claude settings:

https://castlefinance-defi.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect Castle Finance - Power DeFi Solana to ChatGPT

The server address to paste into ChatGPT settings:

https://castlefinance-defi.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect Castle Finance - Power DeFi Solana to Cursor

The server address to paste into Cursor settings:

https://castlefinance-defi.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (9)

Raw names from tools/list. Only developers need these.

pingFree – health check
infoFree – server metadata
swapSwap via Jupiter DEX. 0.001 USDC/call.
yield-optimizeYield optimization. 0.001 USDC/call.
portfolio-balanceWallet balances. 0.001 USDC/call.
scan-poolsFree – search Solana DEX pools by token name, symbol, or address.
pool-dataFree – get detailed data for a specific pool address.
top-poolsFree – top Solana DEX pools by TVL.
slippage-checkFree – estimate slippage for a swap route.