String Utility Belt
Local installMCP server exposing String Utility Belt's utilities and pipelines as tools for AI agents.
397 servers in Utilities
MCP server exposing String Utility Belt's utilities and pipelines as tools for AI agents.

Validate UK addresses, postcodes, emails and phone numbers — Royal Mail PAF, live SMTP and HLR.

Official SpeedOf.Me server - Accurate speed tests via over 200 global edge servers with analytics.
Local tools: PDF, Office, e-Factura, OCR, images, video, speech, translation and nutrition.
Identify a file, find open tools for its format, convert it locally with WebAssembly.
Compress images, PDFs, video, audio, documents & archives via micompress.com
Free network diagnostic tools: IP info, DNS lookup, IPv6 check. No API key.
Extract string values from config files, data files and plain text.

IP geolocation, security, ASN, abuse, time zones, astronomy, and user-agent parsing over stdio.
Local PDF, image, data and text tools for AI assistants. Files stay on your computer.
Discover and call 400+ practical APIs through seven MCP tools with free search and x402 payments.
Extract numeric values from config files, data files and plain text.
Pick giveaway and raffle winners nobody can rig — verifiable by anyone, no API key.
Price a Claude, GPT, Gemini or Grok call before you send it. Runs locally.
Restaurant math for AI assistants: food cost, menu price with VAT, recipe scaling, EU 14 allergens.
Metric ⇄ imperial for technical drawings: dimensions, tolerances, ISO fits, threads, roughness.
Pack a folder with a glob, look inside an archive, unpack it with bomb, traversal and symlink guards
QR codes, WiFi and vCard codes, SEPA payment codes and EAN, UPC and Code 128 barcodes, drawn locally
Convert documents between text formats (markdown, html, and more) via the FileChanger API.
12 calculators for AI cost, energy and agent verification. Free API, no key.
High-throughput Aho-Corasick automaton for simultaneous multi-keyword dictionary matching and conten