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mercury-x402-mcp

MCP serverAI & models

Mercury x402 gives your AI access to web data from 18 services it pays for per call. There are no API keys to set up, so your AI can start fetching data right away and only spends on the calls it actually makes.

Use mercury-x402-mcp in Claude, ChatGPT or Ahel Desktop

Free. Sign in, add mercury-x402-mcp and connect your AI. About a minute.

ClaudeChatGPTAhel Desktop

Also: Claude Code · Cursor · Codex

Then ask your AI: use mercury-x402-mcp to fetch

Details

Available today. Use it from your connected AI after setup.

Add the integration, then ask your AI to pull data from one of the 18 services. More details are in the repository at github.com/mercuryx402/mercury-x402-mcp.

mercury-x402-mcpStart free

What your AI can do with it

  • Fetch web data from any of 18 services
  • Pay per call, only for the data it actually retrieves
  • Start using services without creating or managing API keys
  • Retrieve fresh web data whenever a task needs it

Install mercury-x402-mcp

The server’s own address, for the clients that take one directly. Or connect Ahel once and every client you use reads it from one address, with the account kept on Ahel rather than in each client’s config.

  • Claude Code

    claude mcp add --transport http --scope user mercury-x402-mcp 'https://network.mercury-hq.com/mcp'

    Run it once in your project, then open /mcp to approve any sign-in the server asks for.

  • Claude Desktop

    https://network.mercury-hq.com/mcp

    Add a custom connector in Settings, paste this address, and approve the sign-in.

  • Cursor

    cursor://anysphere.cursor-deeplink/mcp/install?name=mercury-x402-mcp&config=eyJ1cmwiOiJodHRwczovL25ldHdvcmsubWVyY3VyeS1ocS5jb20vbWNwIn0=

    Open the link and Cursor adds the server at that address.

  • ChatGPT

    https://network.mercury-hq.com/mcp

    In Settings, enable Developer mode, create an MCP app, and paste this address. Your plan and workspace must allow custom apps.

  • Codex

    codex mcp add mercury-x402-mcp --url 'https://network.mercury-hq.com/mcp'

    Run it once, then sign in with codex mcp login mercury-x402-mcp if the server asks for an account.

From the project's README

As published by mercuryx402/mercury-x402-mcp in README.md.

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.

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

Tools it offers (18)

What this server listed when Ahel dialed its public endpoint in Oct 2026, with no key and no account of yours. The names are the server’s own.

  • fetch
  • extract
  • markdown
  • metadata
  • links
  • robots
  • diff
  • notarize
  • headers
  • table
  • feed
  • availability
  • validate
  • batch
  • sitemap
  • dns
  • readability
  • redirect

Signals

Last commit
Jun 2026
Weekly downloads
36
Advanced
Delivery
mercury-x402-mcp MCP server → your Ahel connector (mcp.ahel.ai) → your AI.
Item type
mcp-server
Key
io-github-mercuryx402-mercury-x402-mcp
Source
github.com/mercuryx402/mercury-x402-mcp
Hosted endpoint
https://network.mercury-hq.com/mcp

github.com/mercuryx402/mercury-x402-mcp

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