1,120 servers in Utilities
Validates IBAN/ISBN/EAN/Luhn checksums and finds the one wrong digit
Explain cron expressions in English, list next run times, and catch scheduling gotchas.
Calculs du bâtiment (France) : chute de tension NF C 15-100 et catalogue de 111 outils.
Pay-per-call MCP tools and signed on-chain attestations: 20 free/day, then $0.01+ via x402 or a key.
Plan a meal and run kitchen timers that ring on your phone. No sign-in.
Web standards and time reference for agents: HTTP codes, retries, deadlines. Paid via x402.
Unpaid x402 probe: status, latency, payment terms. x402 $0.005 USDC, Base. As is, no warranty.
https text to counts and sha256. x402 $0.005 USDC, Base. As is, no warranty.
Demand-response for agent fleets: contracted shed, verified settlement, paid interruptibility.
x402 FX, time, weather, US NWS alerts, HN, holidays, geocoding for agents.
Check if AI wrote a text: English, Ukrainian, Kazakh, Uzbek, Estonian, Georgian, Lithuanian.
Developer utilities: color conversion, WCAG contrast, timestamps, UUIDs, and hashing.
Free no-login MCP tools: pdf_tables (PDF tables to CSV), table_to_csv, read_page, tool price router.
CO₂ estimates for general-aviation flying: by aircraft and hours, by fleet, or by fuel.
English readability scores (Flesch, Flesch-Kincaid, Fog, SMOG) and text stats. Text never stored.
Public holidays and working-day maths for 200+ countries, cross-checked across three providers.
Offline check-digit validation for IBAN, BIC, EU VAT, GTIN/EAN/UPC and ISBN. Format check only.
Inspect and strip EXIF, XMP, IPTC, C2PA, PDF info, and Word properties.
Estimate theoretical and OEE-adjusted annual battery line capacity.
Offline phone-number validation and formatting (E.164, region, line type). No carrier lookup.
Business-day and public-holiday math for 29 countries: add business days, days between, holidays.
Free equipment tools: cost per hour, repair vs replace, compliance, VIN, recalls, manuals.
IBAN, EU VAT, NIP, REGON, PESEL, email checks. Only $0.001 (0.1 cent) per check via x402 on Base
15 pay-per-call Bitcoin and developer tools, paid in sats over Lightning (L402).
Nigeria PAYE, VAT and CBN rates, sourced and dated. Plus invoice totals, QR codes, JSON, Base64.
Privacy clinic + pay-per-call data APIs for AI agents via x402. Never pays or touches keys.
Returns the actual current date/time in a given format and IANA timezone.
One MCP server exposing every tool in the Gumball portfolio.