io.github.donniertf-hub/us-business-calendar-mcp

up checked 2026-11-12T06:39:41.315Z

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Publisher-provided title

US Business Calendar MCP

Publisher-provided description

US federal holidays, business-day maths, invoice due dates and IRS deadlines.

Summary by lookupd

Offers US federal holiday lookups, business-day and due-date math, IRS deadlines, domain trust and TLS checks, email DNS checks and IBAN…

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http us-business-calendar https://us-business-calendar-mcp.donniertf.workers.dev/mcp

Codex, remote (streamable-http)

codex mcp add us-business-calendar --url https://us-business-calendar-mcp.donniertf.workers.dev/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "us-business-calendar": {
      "url": "https://us-business-calendar-mcp.donniertf.workers.dev/mcp"
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (9 tools)

Publisher-provided text

• next_holidays FREE. Next 3 US federal holidays (with observed dates) and whether today is a business day.
• business_days PRO. Count US business days between two dates (excludes weekends and federal holidays).
• due_date PRO. Due date after N business days or N calendar days (rolled to next business day) — Net 30/60, ACH settlement, contract notice periods.
• irs_deadlines PRO. Upcoming IRS filing and payment deadlines for the next N months (individual, payroll, corporate), adjusted for weekends/holidays; optional fiscal_year_end.
• domain_age FREE. Domain trust quick check: registration date, age in days, registrar, expiry and risk flags from RDAP. Accepts a domain or URL.
• domain_trust_report Full domain/URL trust report: RDAP registration, registrar, status, nameservers, plus active TLS certificates and issuers from crt.sh, with risk flags.
• cert_history Active TLS certificates for a domain from Certificate Transparency logs (crt.sh): issuers, names, validity dates.
• email_domain_check Email/domain deliverability check: MX records, SPF and DMARC policy for a domain or email address (DNS over HTTPS).
• iban_validate FREE. Validate an IBAN offline: country, length and ISO 13616 mod-97 checksum, plus bank code and formatted IBAN. No outside source.

Details

• Version: 1.0.0
• Transports: streamable-http
• Uptime (7 days): 100%
• Median latency: 387 ms
• First indexed: 2026-11-01T09:28:20.132Z
• Last seen in registry: 2026-11-01T09:28:20.132Z
• Repository: https://github.com/donniertf-hub/uk-mcp-fleet
• Website: https://us-business-calendar-mcp.donniertf.workers.dev

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