Mercury402: Treasury/FRED financial data over x402 MCP Server

by dudman1 Your server? Claim it

answering

Mercury402: Treasury/FRED financial data over x402 is answering right now. Last checked 14 min ago. 250 installs a week from npm. It exposes 2 tools. Last commit 30 Oct 2026.

Treasury/FRED financial data over x402: pay-per-call US yields, macro and forex in USDC on Base

Installs per day peak 620 · avg 33 · +633% w/w

a month agotoday

Uptime history 7 days of history · worst day 99%

7 days agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

496 ms

Response time

average over 24h

250

Installs / week

npm and PyPI

What the code does

We read the source, 2 d ago · tools taken from the live server · rules 995398eba69f

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Reads files and sends them to the network .cutover-backup/src_server.js:726, src/server.js:908

    const files = fs.readdirSync(logDir)

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 14 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add mercury402-mcp --transport http https://mcp.mercury402.com/mcp

Settings → Connectors → Add custom connector, then paste this address

https://mcp.mercury402.com/mcp

~/.codex/config.toml

[mcp_servers.mercury402-mcp]
url = "https://mcp.mercury402.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "mercury402-mcp": {
      "url": "https://mcp.mercury402.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "mercury402-mcp": {
      "type": "http",
      "url": "https://mcp.mercury402.com/mcp"
    }
  }
}

Available tools 2

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

endpoint

get_endpoint_data

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).

endpoints

list_endpoints

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.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.mercury402.com/mcp	streamable-http	answering	501 ms	14 min ago

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Mercury402: Treasury/FRED financial data over x402 — questions

Answers built from our own checks of this server.

What can Mercury402: Treasury/FRED financial data over x402 do?

It exposes 2 tools, read directly from the server on our last check. Among them: get_endpoint_data, list_endpoints. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Mercury402: Treasury/FRED financial data over x402 working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 496 ms. The bar chart above shows every period we have measured.

How do I connect Mercury402: Treasury/FRED financial data over x402?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Mercury402: Treasury/FRED financial data over x402 need an API key?

No. Mercury402: Treasury/FRED financial data over x402 completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Mercury402: Treasury/FRED financial data over x402?

It answers our handshake in 496 ms on average, which is faster than 24% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.

How many people use Mercury402: Treasury/FRED financial data over x402?

The npm package mercury402-mcp was installed 250 times in the last week. Week over week that is +633%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is Mercury402: Treasury/FRED financial data over x402 open source?

The code is open source: it is published under the MIT licence, written in JavaScript, 1 stars on GitHub and 2 open issues. The licence covers the code in the repository, not the hosted service at mcp.mercury402.com, which runs on its operator's own terms.