# US Federal Holidays and Business Days (remote · us-federal-holidays-business-days-mcp.lipmichal.workers.dev)

Exact U.S. federal holidays and business days 1971-2100, OPM and Federal Reserve observance.

- Trust score: 66/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `us-federal-holidays-business-days-mcp.lipmichal.workers.dev`: 66/100 (this document), [markdown](https://verifymcp.io/servers/theluckystrike-us-federal-holidays-business-days-mcp/us-federal-holidays-business-days-mcp.md), [page](https://verifymcp.io/servers/theluckystrike-us-federal-holidays-business-days-mcp/us-federal-holidays-business-days-mcp)

## Channel facts

- Endpoint: `https://us-federal-holidays-business-days-mcp.lipmichal.workers.dev/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS enforcement could not be verified: the plaintext port answered with HTTP 405, which proves neither a plaintext path nor enforcement.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 61/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 1082 tokens (~216/item across 5 items; 5 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 20/100
  - Stability observed for 6 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 89/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 68% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the US Federal Holidays and Business Days MCP server?

US Federal Holidays and Business Days is a hosted endpoint at https://us-federal-holidays-business-days-mcp.lipmichal.workers.dev/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http theluckystrike-us-federal-holidays-business-days 'https://us-federal-holidays-business-days-mcp.lipmichal.workers.dev/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "theluckystrike-us-federal-holidays-business-days": {
      "url": "https://us-federal-holidays-business-days-mcp.lipmichal.workers.dev/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "theluckystrike-us-federal-holidays-business-days": {
      "type": "http",
      "url": "https://us-federal-holidays-business-days-mcp.lipmichal.workers.dev/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.theluckystrike-us-federal-holidays-business-days]
url = "https://us-federal-holidays-business-days-mcp.lipmichal.workers.dev/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "theluckystrike-us-federal-holidays-business-days": {
      "type": "remote",
      "url": "https://us-federal-holidays-business-days-mcp.lipmichal.workers.dev/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add theluckystrike-us-federal-holidays-business-days --url 'https://us-federal-holidays-business-days-mcp.lipmichal.workers.dev/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  theluckystrike-us-federal-holidays-business-days:
    url: "https://us-federal-holidays-business-days-mcp.lipmichal.workers.dev/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "theluckystrike-us-federal-holidays-business-days": {
      "Transport": "http",
      "Url": "https://us-federal-holidays-business-days-mcp.lipmichal.workers.dev/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add theluckystrike-us-federal-holidays-business-days -t streamable-http -u 'https://us-federal-holidays-business-days-mcp.lipmichal.workers.dev/mcp'
```

### Other

```json
{
  "mcpServers": {
    "theluckystrike-us-federal-holidays-business-days": {
      "type": "http",
      "url": "https://us-federal-holidays-business-days-mcp.lipmichal.workers.dev/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-04 (score 66, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-02 (score 65, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-31 (score 64, +1)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-30 (score 63)

First indexed and scored.

## MCP tools (5)

### `list_federal_holidays` (~166 tokens)

List U.S. federal holidays for a year

Exact U.S. federal holidays for any year 1971-2100 under 5 U.S.C. 6103: legal date, OPM observed date (Saturday -> Friday, Sunday -> Monday, so New Year's Day 2022 is observed Friday 2021-12-31) and the Federal Reserve closure date (Fed Banks stay OPEN the Friday before a Saturday holiday). Applies the rule history a model tends to get wrong: Juneteenth from 2021, MLK Day from 1986, Veterans Day on the 4th Monday of October 1971-1977, and Inauguration Day (DC area only, flagged optional). No network calls.

Input parameters:

- `year` (integer, required): Calendar year, 1971-2100.

### `is_business_day` (~213 tokens)

Check if a date is a U.S. business day

Says whether a date (1971-2100) is a business day on the U.S. federal (OPM) calendar or the Federal Reserve banking calendar, names the holiday if any, and returns the previous and next business day. The two calendars differ when a holiday falls on Saturday: 2026-07-03 is a federal holiday but a Fed banking day.

Input parameters:

- `calendar` (string): federal = OPM observance for federal employees (Saturday holiday -> Friday off). fed_banking = Federal Reserve Banks (Saturday holiday -> open Friday; Sunday -> closed Monday). Use fed_banking for AC…
- `date` (string, required)
- `extra_closed_dates` (array): Extra closed dates to treat as holidays, e.g. a one-off executive order closure such as 2025-01-09.
- `include_inauguration_day` (boolean): federal calendar only: also close Inauguration Day (DC-area federal employees only, every 4 years).

### `add_business_days` (~218 tokens)

Add or subtract U.S. business days

Adds (or with a negative number subtracts) N business days to a date, skipping weekends and observed U.S. federal or Federal Reserve holidays exactly. The start date is not counted. With 0, returns the start date if it is a business day, otherwise the next one. Lists every holiday skipped.

Input parameters:

- `business_days` (integer, required): Business days to add; negative to go back.
- `calendar` (string): federal = OPM observance for federal employees (Saturday holiday -> Friday off). fed_banking = Federal Reserve Banks (Saturday holiday -> open Friday; Sunday -> closed Monday). Use fed_banking for AC…
- `extra_closed_dates` (array): Extra closed dates to treat as holidays, e.g. a one-off executive order closure such as 2025-01-09.
- `include_inauguration_day` (boolean): federal calendar only: also close Inauguration Day (DC-area federal employees only, every 4 years).
- `start_date` (string, required)

### `count_business_days` (~223 tokens)

Count U.S. business days between two dates

Counts business days between two dates (1971-2100) on the U.S. federal or Federal Reserve calendar, excluding weekends and observed holidays. include_start and include_end default to true, like Excel NETWORKDAYS. If end is before start the count is negative. Lists the weekday holidays that were excluded.

Input parameters:

- `calendar` (string): federal = OPM observance for federal employees (Saturday holiday -> Friday off). fed_banking = Federal Reserve Banks (Saturday holiday -> open Friday; Sunday -> closed Monday). Use fed_banking for AC…
- `end_date` (required)
- `extra_closed_dates` (array): Extra closed dates to treat as holidays, e.g. a one-off executive order closure such as 2025-01-09.
- `include_end` (boolean)
- `include_inauguration_day` (boolean): federal calendar only: also close Inauguration Day (DC-area federal employees only, every 4 years).
- `include_start` (boolean)
- `start_date` (string, required)

### `invoice_due_date` (~188 tokens)

Invoice due date from net terms

Computes an invoice due date from an issue date and net terms in calendar days (Net 30 = 30), then optionally rolls a weekend or U.S. holiday due date: following (next business day), preceding, or modified_following (next business day unless it crosses into the next month). Uses exact observed federal or Federal Reserve holidays.

Input parameters:

- `calendar` (string): fed_banking (default) matches when banks settle payments; federal uses OPM observance.
- `extra_closed_dates` (array): Extra closed dates to treat as holidays, e.g. a one-off executive order closure such as 2025-01-09.
- `issue_date` (string, required)
- `net_days` (integer, required): Net terms in calendar days, e.g. 30 for Net 30.
- `roll` (string): How to move a due date that is not a business day.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/theluckystrike-us-federal-holidays-business-days-mcp/us-federal-holidays-business-days-mcp#diagnostics

## Score history

- 2026-11-05: 66
- 2026-11-04: 66
- 2026-11-03: 65
- 2026-11-02: 65
- 2026-11-01: 64
- 2026-10-31: 64
- 2026-10-30: 63

## Common questions

### What is the US Federal Holidays and Business Days MCP server?

US Federal Holidays and Business Days is an MCP server listed in the public MCP registry as io.github.theluckystrike/us-federal-holidays-business-days…. Exact U.S. federal holidays and business days 1971-2100, OPM and Federal Reserve observance. This page covers its hosted endpoint (https://us-federal-holidays-business-days-mcp.lipmichal.workers.dev/mcp).

### Is the US Federal Holidays and Business Days MCP server safe to use?

US Federal Holidays and Business Days scores 66 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the US Federal Holidays and Business Days MCP server expose?

US Federal Holidays and Business Days exposes 5 tools: list_federal_holidays, is_business_day, add_business_days, count_business_days, invoice_due_date. Their descriptions and schemas cost roughly 1,008 tokens of context every time the server is loaded.

### Does the US Federal Holidays and Business Days MCP server require authentication?

No. We connected to US Federal Holidays and Business Days without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the US Federal Holidays and Business Days MCP server still maintained?

US Federal Holidays and Business Days is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://us-federal-holidays-business-days-mcp.lipmichal.workers.dev/mcp
- Repository: https://github.com/theluckystrike/us-federal-holidays-business-days-mcp
- Website: https://us-federal-holidays-business-days-mcp.lipmichal.workers.dev/
- Changelog RSS feed: https://verifymcp.io/servers/theluckystrike-us-federal-holidays-business-days-mcp/us-federal-holidays-business-days-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/theluckystrike-us-federal-holidays-business-days-mcp/us-federal-holidays-business-days-mcp.json
- HTML version of this page: https://verifymcp.io/servers/theluckystrike-us-federal-holidays-business-days-mcp/us-federal-holidays-business-days-mcp