Market and on-chain data for AI agents. A local (stdio) bridge to the santyvv-data remote MCP server: crypto prices from several venues, token facts, OHLC candles, market overview, DeFi TVL and wallet balances.

Eight tools, no API keys and no accounts. Two are free; the other six are paid per call in USDC on Base through the x402 protocol, so you pay for what you use and nothing else.

Install

npx -y santyvv-data-mcp

You normally don't run it by hand: your MCP client starts it. Add this to your client's config (Claude Desktop, Cursor, VS Code, Cline…):

{
	"mcpServers": {
		"santyvv-data": {
			"command": "npx",
			"args": ["-y", "santyvv-data-mcp"]
		}
	}
}

Without any configuration the two free tools work right away:

Tool	What it gives you
`catalogo`	everything for sale, its price and its parameters
`estado_fuentes`	live status of every upstream source (so you know before paying)

Paying for the paid tools (optional)

To let the bridge pay the six paid tools automatically, give it a wallet with USDC on Base (the bridge signs the exact amount of each call; it never sends funds anywhere else):

{
	"mcpServers": {
		"santyvv-data": {
			"command": "npx",
			"args": ["-y", "santyvv-data-mcp"],
			"env": {
				"X402_PRIVATE_KEY": "0x…",
				"X402_MAX_PRICE_USDC": "0.05"
			}
		}
	}
}

Variable	Default	What it does
`X402_PRIVATE_KEY`	(none)	wallet that pays each call (USDC on Base)
`X402_MAX_PRICE_USDC`	`0.05`	refuses to pay anything above this price per call
`SANTYVV_MCP_URL`	`https://mcp.santyvv.com/mcp`	the remote server to bridge to

Paid tools, with their price per call: precio ($0.02), ficha_token ($0.03), velas ($0.01), mercado ($0.03), tvl_protocolo ($0.01), saldo ($0.03).

Notes

The key stays local. It is read from your environment, used to sign one payment per call and never sent anywhere else. Use a dedicated wallet with a small balance.
This package does not reimplement anything. It asks the remote server for its tool list and forwards calls, so the tools, their prices and the data are always the ones actually served.
No accounts, no tracking. No sign-up, no API keys, no cookies.
Privacy policy: https://mcp.santyvv.com/privacy · HTTP API with the same data: https://x402.santyvv.com/api · Registered as com.santyvv/tienda in the official MCP Registry.

Develop

npm install
npm run build     # bundles src/index.ts into dist/index.mjs
npm run probar    # starts the bridge over stdio and calls a free tool
npm run probar -- --paga   # also calls a paid tool (needs X402_PRIVATE_KEY)

MIT.