Mercury402: Treasury/FRED financial data over x402
Treasury/FRED financial data over x402: pay-per-call US yields, macro and forex in USDC on Base
Should I use this
Quality & Safety
Based on automated analysis of tool definitions and protocol compliance.
Context Cost
This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.
Install
One-Click Install
Add this to your `claude_desktop_config.json` file:
{
"mcpServers": {
"mercury402-mcp": {
"command": "npx",
"args": [
"mercury402-mcp"
]
}
}
}Runnable packages
0.1.4stdioRemote endpoints
https://mcp.mercury402.com/mcpstreamable-httpWhat it can do
Tool inventory
Tools (2)
🟢list_endpoints(category, search)
List Mercury402 financial data endpoints (78 total) with path, method, category, description, price in USD (paid per call in USDC on Base via x402) and accepted parameters. Free; makes no network calls.
Input Schema
{
"type": "object",
"properties": {
"category": {
"type": "string",
"enum": [
"ai",
"breakeven-inflation",
"composite",
"forex",
"fred",
"macro",
"treasury",
"yield-spread"
],
"description": "Only return this category"
},
"search": {
"type": "string",
"description": "Case-insensitive substring match on path or description"
}
},
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢get_endpoint_data(path, params, pay)
Call a Mercury402 endpoint on the live API. This hosted endpoint is discovery-only: endpoints return HTTP 402 and this tool returns the price and x402 payment instructions instead of data. Pay with your own x402 client, or run mercury402-mcp locally (npx -y mercury402-mcp) with your own wallet. Use list_endpoints first to find paths and parameters. Path params can be inline ("/v1/fred/UNRATE") or passed in params ("/v1/fred/{series_id}" + {"series_id":"UNRATE"}). Other params go to the query string (GET) or JSON body (POST).
Input Schema
{
"type": "object",
"properties": {
"path": {
"type": "string",
"description": "Endpoint path, e.g. \"/v1/treasury/yield-curve/daily-snapshot\" or \"/v1/fred/UNRATE\""
},
"params": {
"type": "object",
"additionalProperties": {
"anyOf": [
{
"type": "string"
},
{
"type": "number"
},
{
"type": "boolean"
},
{
"type": "array",
"items": {
"type": "string"
}
}
]
},
"description": "Path, query (GET) or body (POST) parameters"
},
"pay": {
"type": "boolean",
"description": "Paid mode only: set false to just get the price quote without paying. Default true."
}
},
"required": [
"path"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}Community
Evidence