Utility Grid MCP Server

ForgeMesh Utility Grid MCP

A ForgeMesh Labs product.

Search and use more than 400 practical APIs without loading hundreds of tools into your agent. Utility Grid exposes seven compact MCP tools for OCR, image and audio processing, web extraction, math, conversions, geodata, and more. Catalog discovery is free; API execution is paid per call in USDC on Base through x402. No account or API key is required.

Rather than exposing one MCP tool per route (unmanageable at this scale and growing), this server exposes a handful of meta-tools: browse/search the live catalog, fetch a route's exact call spec, then call any route generically. New routes on the upstream service show up automatically — nothing here is hardcoded to today's catalog.

Quick start (Claude Desktop / Claude Code / any MCP client)

{
  "mcpServers": {
    "utility-grid": {
      "command": "npx",
      "args": ["-y", "@forgemeshlabs/utility-grid-mcp"],
      "env": {
        "WALLET_PRIVATE_KEY": "0x..."
      }
    }
  }
}

WALLET_PRIVATE_KEY is only needed for the 3 paid tools. Discovery works with no wallet at all — skip the env block entirely to browse and plan calls for free.

Tools

Categories in the catalog (illustrative, not exhaustive)

geo (airports, zip codes, geocoding, weather), lookups (dictionary, Bible, country info, holidays), math (statistics, matrices, equations, geometry), utilities (QR codes, hashing, UUIDs, phone parsing), vision (OCR, image captioning, background removal), audio (TTS, transcription, format conversion), time (timezones, cron, sun/moon), space (NASA APOD, asteroids, solar weather), web (content extraction, robots.txt/Content-Signal checks), registry (fleet catalog, daily spotlight), documents (PDF handling), text (language detection, readability), economy (fx rates, financial calculators), science, developer, domains, ai, and fun (fortunes, chess, trivia).

Call list_capabilities with no arguments for the live, current breakdown — the catalog grows over time and this README will drift; the tool won't.

Typical flow

1. search_capabilities({ query: "background removal" }) — free, finds /remove-background
2. get_endpoint_spec({ path: "remove-background" }) — free, shows the exact input schema and price
3. call_endpoint({ path: "remove-background", body: { image_url: "https://..." } }) — paid, does the x402 dance and returns the result

Or skip straight to call_endpoint if you already know the route and its input shape.

Requirements

Node.js 20+. Paid tools need WALLET_PRIVATE_KEY: use a dedicated, low-balance Base wallet funded with USDC. The server refuses to sign for any payee other than the two Utility Grid wallets, any network other than Base mainnet, any asset other than USDC, or any amount over the cap ($0.05 per call, $10 per session). The env vars X402_MAX_PRICE_USD and X402_SESSION_BUDGET_USD can only lower those caps. Requests are same-origin, time out after 60 seconds, are capped at 2 MB, and never follow redirects. Tool results are returned wrapped as { source, untrusted, content }: the content is remote data, not instructions.

How payment works

No signup, no API key, no subscription. call_endpoint, daily_402, and agent_service_directory each trigger the same flow: the first request returns an HTTP 402 challenge, this MCP server signs a USDC payment authorization (EIP-3009) on Base and retries, and the result lands in the same response — including settlement details under _payment when available.

Direct API

Prefer raw HTTP? The full agent-readable surface:

• https://x402.forgemesh.io/llms.txt — one-page summary for agents
• https://x402.forgemesh.io/openapi.json — OpenAPI 3.1 with x402 payment metadata, full input schemas, and worked examples for every route (this is what list_capabilities/search_capabilities/get_endpoint_spec read from, live, every call)
• https://x402.forgemesh.io/.well-known/x402.json — x402 discovery manifest

Sponsored cards (Lulu Ads)

list_tools is a plain fetch of GET https://x402.forgemesh.io/menu. ForgeMesh attaches one disclosed Lulu Ads card to that free response server-side, as a plain labelled data field — never text the model could read as an instruction:

"sponsored": { "label": "Sponsored", "text": "...", "url": "https://..." }

This package ships no ad credentials and makes no calls to the ads network; it passes the field through untouched. Paid tools never carry a card. Strip it with delete result.sponsored.

FAQ

Do I need an account or API key? No. x402 payments are the only credential, and only for the 3 paid tools.

What chain and token? USDC on Base mainnet (eip155:8453).

Will this break when the upstream catalog changes? No — list_capabilities, search_capabilities, and get_endpoint_spec all read /openapi.json live (cached in-memory for 5 minutes). call_endpoint never needs a hardcoded schema at all; it just forwards your JSON body.

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Built by ForgeMesh Labs · Powered by the x402 protocol · MIT License