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.
Available components
Last scanned (3 hours ago)
Scores higher than 52% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Finance and Payments
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. How we score → Why this is hard to score →
Endpoint Security63
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS enforcement could not be verified: the plaintext port answered with HTTP 405, which proves neither a plaintext path nor enforcement. View diagnostics → Unverified
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability61
- AI-judged instruction clarity (good).Pass
- 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. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management20
- Stability observed for 6 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage89
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 68% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 4 Nov 26 +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.
- 2 Nov 26 +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.
- 31 Oct 26 +1
- Stability: unverified → 0.03 ▲ functional
- 30 Oct 26 63
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Probed https://us-federal-holidays-business-days-mcp.lipmichal.workers.dev/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=lipmichal.workers.dev | CN=WE1,O=Google Trust Services,C=US | 2 Oct 2026 | 31 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | ebf145553d5751d20e0d3cd51e3d7a94 |
| SANs: lipmichal.workers.dev, *.lipmichal.workers.dev | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of us-federal-holidays-business-days-mcp.lipmichal.workers.dev. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| dev. | present | 60074 | 8 | Verified |
| workers.dev. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://us-federal-holidays-business-days-mcp.lipmichal.workers.dev/mcp | Verified | 200 | |
| http (plaintext) | http://us-federal-holidays-business-days-mcp.lipmichal.workers.dev/mcp | Inconclusive | 405 |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
add_business_days Add or subtract U.S. business days ~218
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.
| Name | Type | Req | Description |
|---|---|---|---|
| business_days | integer | yes | 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 | yes | – |
No output schema declared.
No examples provided.
count_business_days Count U.S. business days between two dates ~223
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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 | – | yes | – |
| 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 | yes | – |
No output schema declared.
No examples provided.
invoice_due_date Invoice due date from net terms ~188
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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 | yes | – |
| net_days | integer | yes | 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. |
No output schema declared.
No examples provided.
is_business_day Check if a date is a U.S. business day ~213
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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 | yes | – |
| 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). |
No output schema declared.
No examples provided.
list_federal_holidays List U.S. federal holidays for a year ~166
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.
| Name | Type | Req | Description |
|---|---|---|---|
| year | integer | yes | Calendar year, 1971-2100. |
No output schema declared.
No examples provided.
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.
remote · us-federal-holidays-business-days-mcp.lipmichal.workers.dev
claude mcp add --transport http theluckystrike-us-federal-holidays-business-days 'https://us-federal-holidays-business-days-mcp.lipmichal.workers.dev/mcp'
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.