com.modernmustardseed由 modernmustardseed.com 发布官方发布者v1.0.1更新于 Nov 2, 2026
U.S. federal holidays with observed dates and business-day math. Example from an open-source kit.
发布方自己的服务：AI Search Kit
远程 MCP 服务器，为助手提供 2021 至 2100 年美国联邦假日日期与工作日计算。
Web executable，通过 Streamable HTTP。 远程服务在工作区中配置后即可从网页运行时运行。
把这段提示词粘贴到 Claude Code、Codex、Cursor 等智能体，或 SourceWeft 对话中。智能体会读取该服务器的安装指南，先向你展示发布者、端点和登录方式，经你同意后再把它添加到你的客户端。密钥不会写进任何命令。
阅读 https://sourceweft.com/mcp/com.modernmustardseed%2Fholiday-calendar/install.md，并按其中说明把这个 MCP 服务器接入我的客户端。修改任何配置之前，先告诉我它的发布者、端点和登录方式，等我确认。不要把 API 密钥写进命令或我会提交的文件；问我密钥应从哪里获取。把它添加到你客户端的 mcpServers 配置中。
{
"mcpServers": {
"holiday-calendar": {
"type": "http",
"url": "https://starter.modernmustardseed.com/holidays"
}
}
}Ship a remote MCP connector for Claude that is built to pass Anthropic's directory review on the first try.
This kit is the set of patterns Modern Mustard Seed uses for the connectors it runs in production, pulled out into a clean Next.js project you can fork:
mcp-handler, serving Streamable HTTP at one URL per connector, with no redirect.readOnlyHint or destructiveHint on every tool, snake_case names of 64 characters or fewer, and descriptions that describe instead of steer. Break a rule and pnpm test fails, long before a reviewer sees it.160.79.104.0/21, so nothing is keyed by IP and nothing returns HTTP 429./.well-known/security.txt, all driven by one config file.MIT licensed. Built by Modern Mustard Seed.
The example connector runs live, deployed from this repository with no changes:
https://starter.modernmustardseed.com/holidays (add it in Claude under Customize > Connectors > Add custom connector)com.modernmustardseed/holiday-calendarRun the evals against it yourself: node eval/holidays.eval.mjs https://starter.modernmustardseed.com
You need Node 22.6 or later, pnpm, and a Vercel account (any host that runs Next.js works).
1. Make your copy. (1 minute)
Or select Use this template on GitHub.
2. Run it and prove it works. (2 minutes)
In a second terminal:
You should see 32 pass from the unit tests and 35 of 35 passed from the evals. Open http://localhost:3000/docs/holidays to see the docs page reviewers read.
3. Make it yours. (2 minutes)
Edit lib/site.ts: company name, location, website, support inbox, security inbox, and the policy date. Every public page and security.txt read from it. Replace app/icon.svg and app/apple-icon.png with your own mark; the directory listing asks for an icon.
4. Deploy. (3 minutes)
Import the repository at vercel.com/new, or from the terminal:
Vercel sets VERCEL_PROJECT_PRODUCTION_URL, which the pages use for their links. Leave Attack Challenge Mode and any bot-protection rule off for your MCP paths: they answer Claude with a challenge page.
5. Check the deployment. (1 minute)
Preflight checks HTTPS, no redirect, no 403 or 429, every public page returning 200, the MCP handshake and the annotation rules.
6. Try it in Claude. (1 minute)
In Claude, open Customize > Connectors > Add custom connector and paste https://your-project.vercel.app/holidays. Ask: "An invoice dated 2026-11-20 is due in 10 business days. What date is that?" In Claude Code:
lib/holidays/tools.ts to lib/<yours>/tools.ts. Declare each tool as a ToolSpec: name, title, description, zod input schema, annotations, a per-minute limit, optional global limits, the fields that are safe to log, and a run function that returns ok(data) or fail(code, sentence).app/holidays/route.ts to app/<yours>/route.ts and point it at your tools.app/docs/holidays/page.tsx to app/docs/<yours>/page.tsx. Keep the "For reviewers" section: you paste it into the form.app/privacy/page.tsx so every sentence is true of your tools: what they receive, what they read, what you keep and for how long, who else touches it.eval/holidays.eval.mjs. Write 20 to 50 cases from prompts real users type, with expected values from an authority outside your code. Include the error cases.safeFetch from lib/mcp/safe-fetch.ts. Never fetch a user-supplied URL directly.pnpm preflight and pnpm evals against production, test every tool in Claude, then work through docs/SUBMISSION-CHECKLIST.md.Why each pattern exists, with the rule it answers: docs/PATTERNS.md.
The example runs with no environment variables. Optional:
The Holiday Calendar computes the eleven U.S. federal holidays from 5 U.S.C. 6103, a public-domain statute, with the observance rule federal offices follow: Saturday holidays move to the Friday before, Sunday holidays to the Monday after. It covers 2021 through 2100. Its tools list a year of holidays, find the next ones, check whether a date is a business day, add business days to a date, and count business days in a span. It makes no network calls and stores nothing. The evals check its answers against the Office of Personnel Management's published schedules.
Issues and pull requests are welcome; see CONTRIBUTING.md. Report vulnerabilities privately as described in SECURITY.md.
This kit is not affiliated with or endorsed by Anthropic. "Claude" is a trademark of Anthropic, PBC. Directory rules change; the checklist links every rule to Anthropic's documentation so you can confirm it before you submit.
This kit comes from Modern Mustard Seed, an AI studio in Kalispell, Montana that builds websites, AI voice agents and custom software for small businesses, managed for you, end to end.
MIT, Copyright (c) 2026 Modern Mustard Seed LLC.
来源：README.md，提交 d51d601
List federal holidays
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.
year必填Find the next federal holidays
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.
countfrom_dateCheck a business day
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.
date必填Add business days
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.
start_date必填business_days必填Count business days
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.
end_date必填start_date必填已满足适用检查项的 100%
该评分衡量此收录条目的完整程度，依据注册中心条目、端点与公开来源计算得出。它不是对服务器本身的评价，也不表示服务器安全或当前可用：可连通性是带日期的检查结果，评分也不包含安装量或用户评价。
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gh repo create my-connector --template ModernMustardSeed/small-business-mcp-starter --public --clonecd my-connectorpnpm installpnpm devpnpm testpnpm evals http://localhost:3000vercel deploy --prodpnpm preflight https://your-project.vercel.apppnpm evals https://your-project.vercel.appnpx @modelcontextprotocol/inspector --cli https://your-project.vercel.app/holidays --transport http --method tools/listclaude mcp add --transport http holidays https://your-project.vercel.app/holidays