io.github.mercuryx402/mercury-x402-mcp

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

GitHub

No known CVEs

No license

Actively maintained

Last commit 3d ago

Works with most clients

Transport:

0 tools

Grade F

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Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "io-github-mercuryx402-mercury-x402-mcp": {
      "command": "<see-readme>",
      "args": []
    }
  }
}

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Read me

What io.github.mercuryx402/mercury-x402-mcp does

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

Test This Server

No automated test available for this server. Check the GitHub README for setup instructions.

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Score breakdown

29/100across 5 weighted dimensions

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Security

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Frequently Asked Questions

Is io.github.mercuryx402/mercury-x402-mcp safe to use?: io.github.mercuryx402/mercury-x402-mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.
How do I install io.github.mercuryx402/mercury-x402-mcp?: io.github.mercuryx402/mercury-x402-mcp can be installed by cloning its GitHub repository and following the setup instructions in the README.
What AI clients work with io.github.mercuryx402/mercury-x402-mcp?: io.github.mercuryx402/mercury-x402-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio transport.
Is io.github.mercuryx402/mercury-x402-mcp actively maintained?: io.github.mercuryx402/mercury-x402-mcp is actively maintained — last commit was 3 days ago.

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Discussion

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Has anyone used this with Cursor?How do you handle auth?Any alternatives?

mercury-x402-mcp

17 keyless, signed-provenance web-data tools your AI agent can pay for itself — over x402 on Base mainnet (USDC). No Mercury API key, no account, no signup. Your agent calls a tool, it pays the SKU with your wallet, and gets back the result plus an EIP-191 provenance receipt it can verify offline, forever.

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.

Install

npx mercury-x402-mcp

Add to your MCP host (Claude Desktop / Cursor / Cline / any MCP client):

{ "mcpServers": { "mercury": { "command": "npx", "args": ["-y", "mercury-x402-mcp"], "env": { "MERCURY_PRIVATE_KEY": "0xYOUR_BASE_MAINNET_WALLET_KEY" } } } }

MERCURY_PRIVATE_KEY is your Base-mainnet wallet (funded with a little USDC). Mercury is keyless — the only thing you bring is a wallet to pay per call. Tools cost ~$0.003–$0.02 each.

The mercury_catalog and mercury_verify tools work without a wallet (free).

Why

Firecrawl / Jina / Tavily all gate behind a human-created API key + a credit-card plan — an agent can't onboard itself. Mercury can: an agent discovers the tools, pays over x402, and every result is cryptographically signed so the bytes are provably genuine and untampered — what RAG, trading, and agent-to-agent commerce actually need.

Frequently Asked Questions

Is io.github.mercuryx402/mercury-x402-mcp safe to use?

io.github.mercuryx402/mercury-x402-mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.

How do I install io.github.mercuryx402/mercury-x402-mcp?

io.github.mercuryx402/mercury-x402-mcp can be installed by cloning its GitHub repository and following the setup instructions in the README.

What AI clients work with io.github.mercuryx402/mercury-x402-mcp?

io.github.mercuryx402/mercury-x402-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio transport.

Is io.github.mercuryx402/mercury-x402-mcp actively maintained?

io.github.mercuryx402/mercury-x402-mcp is actively maintained — last commit was 3 days ago.

mercury-x402-mcp

Install

npx mercury-x402-mcp

Add to your MCP host (Claude Desktop / Cursor / Cline / any MCP client):

{
  "mcpServers": {
    "mercury": {
      "command": "npx",
      "args": ["-y", "mercury-x402-mcp"],
      "env": {
        "MERCURY_PRIVATE_KEY": "0xYOUR_BASE_MAINNET_WALLET_KEY"
      }
    }
  }
}

MERCURY_PRIVATE_KEY is your Base-mainnet wallet (funded with a little USDC). Mercury is keyless — the only thing you bring is a wallet to pay per call. Tools cost ~$0.003–$0.02 each.

The mercury_catalog and mercury_verify tools work without a wallet (free).

Why

Discovery: https://mercury-x402-jed.fly.dev/.well-known/x402 · https://mercury-x402-jed.fly.dev/llms.txt