Utilities MCP servers

Public holidays and business-day math (T+N, counts) for many countries; pay per call via x402

Plan a meal and run kitchen timers that ring on your phone. No sign-in.

32 x402 pay-per-call tools: SEO, agent audits, JSON/text utils, OSINT. USDC on Base; $1=300 calls

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.

Free read-only tools: Market402 x402 index search, operator track records, PDF price quotes.

Developer utilities: color conversion, WCAG contrast, timestamps, UUIDs, and hashing.

See what any amount really looks like: weight, volume, pile size and a true-scale photo.

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.

Public holidays and working-day maths for 200+ countries, cross-checked across three providers.

Inspect and strip EXIF, XMP, IPTC, C2PA, PDF info, and Word properties.

Estimate theoretical and OEE-adjusted annual battery line capacity.

Free styled QR codes, no key: URL, WiFi, contact, text, email. API key adds saved codes + analytics.

160+ calculators: take-home pay for 166 countries, mortgage, loan, VAT, BMI, dates, units, currency.

IBAN, EU VAT, NIP, REGON, PESEL, email checks. Only $0.001 (0.1 cent) per check via x402 on Base

Exact Japanese text & date tools: char count, business days with JP holidays, era, tax, units.

15 pay-per-call Bitcoin and developer tools, paid in sats over Lightning (L402).

Japanese holiday and business-day calculations using official Japan Cabinet Office data.

Where apps write their log files on Windows, macOS and Linux, as exact copyable paths.

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.

ISO 8601 week numbers: date to week, week to date, weeks-per-year.

Convert times between IANA zones and detect skipped or ambiguous DST local times.

Validates IBAN/ISBN/EAN/Luhn checksums and finds the one wrong digit