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8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

{
  "mcpServers": {
    "holiday-calendar": {
      "type": "http",
      "url": "https://starter.modernmustardseed.com/holidays"
    }
  }
}

claude mcp add --transport http holiday-calendar https://starter.modernmustardseed.com/holidays

[mcp_servers.holiday-calendar]
url = "https://starter.modernmustardseed.com/holidays"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "holiday-calendar": {
      "type": "remote",
      "url": "https://starter.modernmustardseed.com/holidays",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "holiday-calendar": {
      "type": "http",
      "url": "https://starter.modernmustardseed.com/holidays"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=holiday-calendar&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vc3RhcnRlci5tb2Rlcm5tdXN0YXJkc2VlZC5jb20vaG9saWRheXMifQ%3D%3D"
}

{
  "servers": {
    "holiday-calendar": {
      "type": "http",
      "url": "https://starter.modernmustardseed.com/holidays"
    }
  }
}

{
  "mcpServers": {
    "holiday-calendar": {
      "httpUrl": "https://starter.modernmustardseed.com/holidays"
    }
  }
}

extensions:
  "holiday-calendar":
    enabled: true
    name: "holiday-calendar"
    type: streamable_http
    uri: "https://starter.modernmustardseed.com/holidays"
    timeout: 300

Quality 96 / 100strong

protocol88 · weight 25

pass
protocol.modernsupports 2026-07-28 (server/discover)
pass
protocol.statelessanswers without a session
pass
protocol.transportstreamable HTTP
warn
protocol.list_ttltools/list declares ttlMs 0, so clients re-fetch it on every use

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene100 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
pass
tools.annotations5 of 5 tools declare readOnlyHint or destructiveHint
pass
tools.directory_hintsevery tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
pass
tools.token_costabout 1,029 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stability100 · weight 15

pass
stability.changesno tool changes in 30 days
pass
stability.rug_pullno tool changed its meaning under the same name

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

5 tools, about 1,029 tokens to load them all · tool set 2c6fd8b9447c · checked 2026-10-19 16:53 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 100 / 100

provenance100

liveness100

freshness100

hygiene100

+repository +namespace-matches-repo +dns-namespace +website +reachable +uptime-100% +updated-7d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://starter.modernmustardseed.com/holidays` streamable-http	none	yes	100%	260 ms	2026-07-28	2026-10-19

Tools (5)

`add_business_days`read-only	Move a number of U.S. business days forward or backward from a date, skipping weekends and observed federal holidays, for due dates, delivery windows and notice periods. The start date is not counted: 1 business day after a Friday is the next Monday, or Tuesday when that Monday is a holiday. Returns the resulting date and every holiday it skipped. Up to 1,000 business days either way.
`check_business_day`read-only	Check whether a date is a U.S. business day (a weekday that is not an observed federal holiday). Returns the weekday, the holiday observed that day if any, and the business days just before and just after it.
`count_business_days`read-only	Count the U.S. business days between two dates, both dates included, leaving out weekends and observed federal holidays. Returns the business day count, the weekend days, and each holiday that fell in the span. Spans up to 3,660 calendar days.
`list_federal_holidays`read-only	List the eleven U.S. federal holidays for one calendar year (2021 through 2100): each holiday's name, its actual date and weekday, the date it is observed when it falls on a weekend (Saturday moves to the Friday before, Sunday to the Monday after), and the rule that sets it, from 5 U.S.C. 6103. Use it to answer which days federal offices close in a year.
`next_federal_holidays`read-only	Find the next one to eleven U.S. federal holidays observed on or after a date, with each one's observed date and how many calendar days away it is. Without from_date it starts from today's date in America/New_York and says which date it used.

Schemas: list_tools.

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Official server.json

{
  "name": "com.modernmustardseed/holiday-calendar",
  "icons": [
    {
      "src": "https://starter.modernmustardseed.com/apple-icon.png",
      "mimeType": "image/png"
    }
  ],
  "title": "Holiday Calendar",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://starter.modernmustardseed.com/holidays",
      "type": "streamable-http"
    }
  ],
  "version": "1.0.1",
  "repository": {
    "url": "https://github.com/ModernMustardSeed/small-business-mcp-starter",
    "source": "github"
  },
  "websiteUrl": "https://starter.modernmustardseed.com/docs/holidays",
  "description": "U.S. federal holidays with observed dates and business-day math. Example from an open-source kit."
}