x402 Probe Tools

dev.workers.lucciocarmino.x402-probePublished by x402-probe.lucciocarmino.workers.devOfficial publisherv1.8.0Updated Nov 14, 2026

Pay-per-call agent tools: x402 probe, web fetch, wallet balances, weather. $0.001 USDC/call

VerifiedStreamable HTTPWeb executableWeb Search & ScrapingFinance

Overview

AI-generated overview

Remote MCP server offering pay-per-call tools — x402 endpoint probing, web page fetch, wallet balances, weather and ETH price — each costing 0.001 USDC on Base.

What you can do
  • Decode an x402 endpoint's price, network, asset and payTo without paying it
  • Fetch a public web page as clean text with title and links
  • Get Wikipedia summaries of a topic
  • Read USDC and gas balances of an EVM address across Base, Ethereum, Arbitrum, Optimism and Polygon
  • Get current weather with a 24-hour hourly forecast for a latitude/longitude, and the ETH/USD spot price
When to use it
Useful when an assistant needs quick, metered access to x402 payment metadata, EVM wallet balances, ETH pricing, or simple web and weather lookups, and you are willing to pay a small per-call fee in USDC rather than manage API keys.
Requirements
A remote streamable HTTP endpoint; no account, API key or environment variables are declared. Each tool call requires paying 0.001 USDC on Base through the x402 flow: an unpaid call returns HTTP 402 with a PAYMENT-REQUIRED challenge, and the call must be resent with a PAYMENT-SIGNATURE. A wallet able to sign x402 payments on Base is therefore needed.
Before you install
Every tool call spends real money (0.001 USDC on Base), so automated or looping agent use can accumulate charges. Payment requires signing with a wallet, which means exposing signing capability to the client; keep spending limits tight. Requests, including addresses and coordinates, go to a third-party remote service.

Installation

In SourceWeft

  1. Open x402 Probe Tools in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/dev.workers.lucciocarmino.x402-probe%2Fx402-tools/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "x402-probe-tools": {
      "type": "http",
      "url": "https://x402-probe.lucciocarmino.workers.dev/mcp"
    }
  }
}

Tools

6

probe_x402

Decode any x402 endpoint's price, network, asset and payTo without paying it. $0.001 USDC on Base (x402).

Parametersurlrequired

fetch_page

Fetch a public web page as clean text + title + links. $0.001 USDC on Base (x402).

Parametersurlrequired

wiki_summary

Wikipedia summary of a topic. $0.001 USDC on Base (x402).

Parametersqrequired

wallet_balances

USDC + gas balances of an EVM address on Base, Ethereum, Arbitrum, Optimism, Polygon. $0.001 USDC on Base (x402).

Parametersaddressrequired

weather

Current weather + hourly 24h forecast for lat/lon. $0.001 USDC on Base (x402).

Parameterslatrequiredlonrequired

eth_price

ETH/USD spot price. $0.001 USDC on Base (x402).

Takes no parameters.

Version history

1
  1. v1.8.0LatestNov 14, 2026

Score

72% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts

    Publish an icon in the registry entry.

  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.