Bizday is answering right now. Last checked 5 min ago. It exposes 8 tools.
Cited US federal and Reserve Bank business days for agents.
Uptime history
7 days of history
7 days agonow
100.0%
Uptime 24h
91 of 91 checks
8
Tools
read from the server
193 ms
Response time
average over 24h
open, no key
Access
streamable-http
Nothing serious here today
Today is the operative word: we check Bizday every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 5 min ago.
run in your terminal
claude mcp add bizday --transport http https://isitabizday.com/mcpSettings → Connectors → Add custom connector, then paste this address
https://isitabizday.com/mcp~/.codex/config.toml
[mcp_servers.bizday]
url = "https://isitabizday.com/mcp".cursor/mcp.json
{
"mcpServers": {
"bizday": {
"url": "https://isitabizday.com/mcp"
}
}
}.vscode/mcp.json
{
"servers": {
"bizday": {
"type": "http",
"url": "https://isitabizday.com/mcp"
}
}
}Available tools 8
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
business
add_business_days
The date that is days business days after start. The start date is day 0, matching Excel WORKDAY, so days=1 always leaves the start date. days is an integer from -3660 to 3660. Omit calendar for us-federal-opm. us-fed-banking keeps Reserve Banks open on the Friday before a Saturday holiday.
is_business_day
Whether a civil date is a business day, and why. Omit calendar for us-federal-opm (US federal offices). us-fed-banking is the Federal Reserve Banks schedule: a Saturday holiday does not close the preceding Friday. us-nyse is NYSE full-day holidays for 2026 through 2028. us-sifma is SIFMA recommended U.S. fixed-income full closes for 2026 and 2027. An early close stays open. us-ca is California state offices for 2026. Farmworkers Day is closed. Friday, July 3, 2026 stays open. us-ny is New York State executive-branch offices for 2026 and 2027. Friday, July 3, 2026 stays open. Election Day 2026 stays open. us-nyc is New York City offices for 2026 and 2027. Friday, July 3, 2026 is closed. Election Day 2026 is closed. The result includes calendar, sources, and disclaimer. Not legal, payroll, or financial advice.
calendars
list_calendars
Shipped calendars: id, name, source URL, Saturday and Sunday rules, coverage, last verified, and changelog. us-federal-opm is the default. us-nyse covers 2026-01-01 through 2028-12-31. us-sifma covers 2026-01-01 through 2027-12-31. us-ca covers 2026-01-01 through 2026-12-31. us-ny covers 2026-01-01 through 2027-12-31. us-nyc covers 2026-01-01 through 2027-12-31.
count
count_business_days
How many business days are in the inclusive span from start through end, matching Excel NETWORKDAYS. Negative when end is earlier. The span must be 3660 days or less. Omit calendar for us-federal-opm.
frcp
frcp_6a_deadline
Count a period stated in days under Fed. R. Civ. P. 6(a)(1). Exclude the trigger day. Count every calendar day, including intermediate Saturdays, Sundays, and legal holidays. Roll only the last day. direction is after or before. days is an integer from 1 to 3660. There is no calendar argument. Legal holidays are the Rule 6(a)(6)(A) days on the federal-office observed weekday, including Juneteenth. This is not Excel WORKDAY. It does not apply state holidays, one-off holidays, clerk inaccessibility, Good Friday, or Inauguration Day, and it does not decide whether a filing is timely.
holidays
list_holidays
Holiday rows for one year. us-federal-opm and us-fed-banking return the eleven nationwide legal public holidays. On us-fed-banking, observed is null when the legal date is a Saturday, because Friday stays open. us-nyse returns the NYSE full-day table and accepts only 2026 through 2028. us-sifma returns the SIFMA U.S. full-close table and accepts only 2026 and 2027. us-ca returns the California state-office table and accepts only 2026. us-ny returns the New York State office table and accepts only 2026 and 2027. us-nyc returns the New York City office table and accepts only 2026 and 2027. A Saturday holiday closes Friday. year is 2021 through 2100 on the federal calendars. Years after 2030 use the same rules and are not a later official table.
report
report_discrepancy
Store a suspected wrong closing for later review. Requires calendar, date, claim, and source_url. The report is not applied to either calendar. The result is accepted true and applied false. claim is one line of at most 500 characters. source_url is an http or https URL with no username or password. Do not send a name or an email. This is not a calculation.
roll
roll_date
Stay on date when it is already a business day. Otherwise move to the nearest business day in direction next or previous. This is not Excel WORKDAY, and it does not decide whether a filing is timely. Omit calendar for us-federal-opm.
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://isitabizday.com/mcp | streamable-http | answering | 210 ms | 5 min ago |
Alternatives to Bizday
same job, measured the same way
B
Business Day Calendars
by workers-quietworklabs-business-days
NYSE, Federal Reserve, TARGET2 and UK business days, holidays and T+N settlement dates.
Bankruptcy
by pipeworx-io
Business bankruptcy filings — US federal bankruptcy courts.
oss-search
by sblattj
Fast local and federated OSS code search and repo discovery for AI agents
AU Agent Utilities
by creatorhub121
Reliable Australian business-day, public-holiday and deadline tools for AI agents.
Holiday Calendar
by modernmustardseed
U.S. federal holidays with observed dates and business-day math. Example from an open-source kit.
MCP Jp Calendar
by skypier-jp-works
MCP server for Japanese business days, holidays, and fiscal-period calculations.
Regulatory Intel MCP
by datakoot
US Federal Register for AI agents: rules, notices and executive orders. No API keys.
Chronoguard
by kelli930
Deterministic temporal and business-date arithmetic for AI agents via MCP.
Bizday — questions
Answers built from our own checks of this server.
What can Bizday do?
It exposes 8 tools, read directly from the server on our last check. Among them: add_business_days, count_business_days, frcp_6a_deadline, is_business_day, list_calendars, list_holidays and 2 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README.
How MCP servers expose tools in the first place →
Is Bizday working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 193 ms. The bar chart above shows every period we have measured.
How do I connect Bizday?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Bizday need an API key?
No. Bizday completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 8 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Bizday?
It answers our handshake in 193 ms on average, which is faster than 80% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.