How do I install the mercury mcp server?

Use a recorded configuration for your client, replace example credential values and paths, and verify the documented runtime. Restart or reconnect the client, then inspect the available tools.

What credentials does it need?

It reads `MERCURY_PRIVATE_KEY` from the environment. Store these in your client's env block or a secrets manager — never commit them to a repository — and grant the narrowest scope that still covers your use case.

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Mercury MCP Server

Agent-payable web data over x402: 18 keyless services an agent pays per call.

Local serverstdio

What is the Mercury MCP Server?

Agent-payable web data over x402: 18 keyless services an agent pays per call.

What the server does

Tools include: clean fetch, LLM-ready markdown, structured extract, link graph, robots, diff, notarize, headers, table extract, feed, availability, validate, batch, sitemap, DNS, readability, redirect — built live from Mercury's catalog, so the list is always current.

More MCP options

Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Maintainer setup documentation.

How to install the Mercury MCP Server

{
  "mcpServers": {
    "mercury-x402": {
      "command": "npx",
      "args": ["-y", "mercury-x402-mcp"],
      "env": {
        "MERCURY_PRIVATE_KEY": "your-value"
      }
    }
  }
}

Add to claude_desktop_config.json, then restart Claude Desktop.

Configuration

Variable	Description	Required
MERCURY_PRIVATE_KEY	Credential the server authenticates with.	Yes

Frequently asked questions

Agent-payable web data over x402: 18 keyless services an agent pays per call. Confirm the tools offered by your installed version in the connected client. Tool availability and permissions depend on the server and account configuration.