HiddenSwap MCP

Connect Claude, Cursor, VS Code and other AI assistants to HiddenSwap, a crypto-to-crypto swap site with no account, no email and no KYC. The assistant can look up coins, get live swap estimates (Monero, Zcash, Bitcoin, Ethereum, USDT and 1,000+ other coins and networks), check whether a pair can be swapped, and follow an order by its ID.

The server is read-only. It never creates a swap, never asks for a wallet address, and needs no API key or account. When someone wants to swap, it returns a link to the swap page on hiddenswap.com, where the person starts the swap themselves.

• Remote endpoint (Streamable HTTP): https://hiddenswap.com/mcp

• Registry name: com.hiddenswap/swap

• More of our open-source work: hiddenswap.com/open-source

Tools

Estimates are not guaranteed: with a floating rate, the final amount is set when the network confirms the deposit.

Related MCP server: CryptoQuant MCP Server

Connect

Most clients connect to the remote endpoint directly. Nothing to install.

Claude Code

claude mcp add --transport http hiddenswap https://hiddenswap.com/mcp

Claude Desktop and claude.ai: Settings, then Connectors, then Add custom connector, with the URL https://hiddenswap.com/mcp.

Cursor (~/.cursor/mcp.json)

{ "mcpServers": { "hiddenswap": { "url": "https://hiddenswap.com/mcp" } } }

VS Code (.vscode/mcp.json)

{ "servers": { "hiddenswap": { "type": "http", "url": "https://hiddenswap.com/mcp" } } }

Clients that only run local (stdio) servers can use the bridge in this repository, which passes every message on to the remote endpoint:

{ "mcpServers": { "hiddenswap": { "command": "npx", "args": ["-y", "github:hiddenswap/hiddenswap-mcp"] } } }

More examples are in examples/.

Docker: docker build -t hiddenswap-mcp . then docker run -i --rm hiddenswap-mcp runs the same stdio bridge.

Command line

The same package works as a small command-line tool (Node.js 18 or later):

npx -y github:hiddenswap/hiddenswap-mcp quote btc xmr 0.1
# 0.1 BTC -> about 13.75 XMR (floating rate, after fees)
# Minimum: 0.00015 BTC
# Swap: https://hiddenswap.com/exchange/btc-to-xmr?amount=0.1&rateType=float&ref=mcp#swap

npx -y github:hiddenswap/hiddenswap-mcp coins "usdt tron"
npx -y github:hiddenswap/hiddenswap-mcp pair zec btc
npx -y github:hiddenswap/hiddenswap-mcp order <order id>

Add --fixed to quote for a fixed-rate estimate, or --json for the raw result.

Other ways in

• A2A: the same four skills as an A2A agent. Card at https://hiddenswap.com/.well-known/agent-card.json, endpoint https://hiddenswap.com/a2a.

• WebMCP: pages on hiddenswap.com register the tools in the browser for agents that support WebMCP.

• llms.txt: a plain-text summary of the site at https://hiddenswap.com/llms.txt.

Limits

Requests are rate-limited per client, and live quotes have a per-minute budget. Answers from a busy period can come from the most recent recorded quote, marked with "source" in the result.

Development

npm test    # runs the bridge against a local stand-in server, no network needed

Set HIDDENSWAP_MCP_URL to point the bridge or the command-line tool at another endpoint.

License

MIT. Made by HiddenSwap.