Windsurf Mercury402: Treasury/FRED financial data over x402 get_endpoint_data
How to: Windsurf Mercury402: Treasury/FRED financial data over x402 get_endpoint_data
Add Mercury402: Treasury/FRED financial data over x402 to Windsurf
-
01
Open ~/.codeium/windsurf/mcp_config.json and merge this in. Keep any servers already there.
{
"mcpServers": {
"mercury402-mcp": {
"serverUrl": "https://mcp.mercury402.com/mcp"
}
}
}-
02
Save the file and restart Windsurf.
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03
Ask for something get_endpoint_data does. Windsurf lists the server's tools on connect and calls get_endpoint_data itself — you do not invoke it by name.
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04
If nothing happens, check the server is running and that Mercury402: Treasury/FRED financial data over x402's identifier in your config matches the one above exactly.
Global only — Windsurf has no per-project MCP config. Refresh Cascade after saving. Windsurf docs
Set these first
Mercury402: Treasury/FRED financial data over x402 will not start until these are set, so get_endpoint_data never becomes available.
-
MERCURY402_PAYER_PRIVATE_KEY -
MERCURY402_MAX_PRICE_USD
Same tool, other clients
This list was read from the server itself, by connecting to it and calling tools/list on 14 November 2026. It is what
the server actually exposes, not what its listing claims.
Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.