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Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

MCP server · Payments & trading

US Business Calendar MCP

By donniertf-hub Verified namespace

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

WebsiteSource codeFinance & paymentsProductivity & docs
Connect to US Business Calendar MCP
Checks passed
12 / 22

3 failed · 7 not measured

Median response
142 ms

Median of successful probes over 7 days

30-day uptime
Not measured

Share of countable probes over 30 days, including daily rollups. Auth challenges are excluded.

Discovered tools
9

Tool definitions returned by this server

Independent monitoring

Health & checks

Status history

Outdated check

Last connection measurement is over 24 hours old. Current availability is unknown.

Last checked
Check summary by test group
Test areaPassedFailedUnmeasured
ConnectionCan a client connect and discover tools?
410
Reliability & speedDoes it respond consistently and quickly?
103
Access & authenticationWhat is required to use this server?
102
Tool qualityAre the tool definitions usable by an agent?
220
Publisher identityCan the publisher be traced to its source?
402

Unmeasured means there is not enough evidence to decide. How these checks work

Inspect individual checks 22 recorded

Core

  • Pass
    Reachable

    Latest probe returned HTTP 200 in 83 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-03-26, serverInfo.name us-business-calendar-mcp.

  • Pass
    Lists tools

    tools/list returned 9 tools.

  • Fail
    Current protocol

    Negotiated 2025-03-26. The bar is 2025-06-18 or newer.

  • Pass
    HTTPS

    The endpoint URL is https.

Performance

  • Not measured
    Fast (p50)

    Median latency 142 ms over 2 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 195 ms over 2 samples in 7 days. The bar is 3000 ms. Need at least 20 samples.

  • Not measured
    Reliable (uptime)

    2 of 2 attempts returned a tool list in 30 days (100%). The bar is 99%. Need at least 30 samples.

  • Pass
    Stable tool list

    No tool was removed and no required parameter was added in the last 30 days.

Access

  • Pass
    Open access

    tools/list succeeded with no credential, and the record declares none.

  • Not measured
    Standard auth

    Auth is not required, so the OAuth metadata check does not apply.

  • Not measured
    Free tier cited

    No publisher quote has been checked.

Tools

  • Pass
    Tools described

    Every tool description is at least 20 characters.

  • Pass
    Valid input schemas

    Every inputSchema is a JSON Schema object.

  • Fail
    Parameters documented

    7 of 18 parameters have a description (39%). The bar is 80%.

  • Fail
    Safety hints

    9 tools set neither readOnlyHint nor destructiveHint.

Publisher

  • Pass
    Verified namespace

    Listed in the Official MCP Registry.

  • Not measured
    Website matches publisher

    This namespace is not a reverse domain, so the website comparison does not apply.

  • Pass
    Source repo linked

    A repository URL is on file.

  • Pass
    Repo owner matches

    The GitHub repository owner matches the namespace login.

  • Pass
    Recently updated

    Updated 2026-10-29T21:13:47.227047Z, within 180 days.

  • Not measured
    Open-source licence

    The GitHub licence lookup has not returned an OSI result yet.

Start using US Business Calendar MCP

Connect to this server

Choose your client, copy the configuration, then enable the server in your client’s MCP settings.

Run this command in your terminal, then restart Claude Code.

Claude Code

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

Capabilities

Tools 9

business_days

PRO. Count US business days between two dates (excludes weekends and federal holidays).

Discovered
cert_history

Active TLS certificates for a domain from Certificate Transparency logs (crt.sh): issuers, names, validity dates.

Discovered
domain_age

FREE. Domain trust quick check: registration date, age in days, registrar, expiry and risk flags from RDAP. Accepts a domain or URL.

Discovered
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.

Discovered
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.

Discovered
email_domain_check

Email/domain deliverability check: MX records, SPF and DMARC policy for a domain or email address (DNS over HTTPS).

Discovered
iban_validate

FREE. Validate an IBAN offline: country, length and ISO 13616 mod-97 checksum, plus bank code and formatted IBAN. No outside source.

Discovered
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.

Discovered
next_holidays

FREE. Next 3 US federal holidays (with observed dates) and whether today is a business day.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected83 ms9
Connected201 ms9

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