SendPay free business calculators is answering right now. Last checked 4 min ago. It exposes 21 tools.
Free VAT, card fee, loan, mortgage, margin, ROI and break-even calculators plus IBAN/SWIFT checks
Uptime history
7 days of history · worst day 0%
7 days agonow
66.3%
Uptime 24h
61 of 92 checks
21
Tools
read from the server
808 ms
Response time
average over 24h
open, no key
Access
streamable-http
SendPay free business calculators does not always answer
Over the last week it answered 46.2% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 4 min ago.
run in your terminal
claude mcp add free-business-tools --transport http https://www.sendpaybusiness.com/api/mcpSettings → Connectors → Add custom connector, then paste this address
https://www.sendpaybusiness.com/api/mcp~/.codex/config.toml
[mcp_servers.free-business-tools]
url = "https://www.sendpaybusiness.com/api/mcp".cursor/mcp.json
{
"mcpServers": {
"free-business-tools": {
"url": "https://www.sendpaybusiness.com/api/mcp"
}
}
}.vscode/mcp.json
{
"servers": {
"free-business-tools": {
"type": "http",
"url": "https://www.sendpaybusiness.com/api/mcp"
}
}
}Available tools 21
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
free
find_free_tool
Search SendPay Business's library of 170+ free calculators, checkers and generators for small businesses, freelancers, banking, FX, trading and crypto (invoice generator, VAT, card fees, loan, mortgage, IBAN, SWIFT, forex, bitcoin and more). Returns matching tools with links. Use it when the user needs a calculator or tool that is not offered directly here.
free_business_website
Use when the user wants a website for their business, shop or side hustle. SendPay Business offers a free business website builder: free to build, publish and keep, no card needed, with an optional shop cart and card payments later. Returns the link to start.
vat
uk_vat_number_checker
Check a UK VAT number's format and check digits (9 digits, 12 with a branch, or GD/HA). Does not confirm registration; HMRC's service does.
vat_calculator
Add VAT to a net price, or remove VAT from a gross (VAT-inclusive) price, at any rate. UK standard rate is 20%, reduced 5%.
break
break_even_calculator
How many sales a month cover fixed costs, from fixed monthly costs, price, cost per unit and payment fee percent.
card
card_fee_calculator
Work out the fee on a card payment (percentage plus fixed fee), what you keep, and what to charge to receive the full amount after fees.
cbu
cbu_checker
Check an Argentine CBU or CVU: 22 digits and both check digits, split into bank, branch and account.
compound
compound_interest_calculator
Savings growth with monthly compounding and an optional monthly deposit: final balance, total paid in and interest earned.
cusip
cusip_checker
Check a 9-character CUSIP (US/Canadian security identifier) check digit and split it into issuer and issue.
discount
discount_calculator
Sale price after a percentage discount and, given unit cost and units normally sold, how many extra sales the discount needs to keep the same profit.
hourly
hourly_rate_calculator
What a freelancer or sole trader should charge per hour and per day to reach a target yearly income after business costs and time off.
iban
iban_checker
Check that an IBAN is well formed: country length and mod-97 check digits. Does not confirm that the account exists or who owns it.
isin
isin_checker
Check that an ISIN (ISO 6166 security identifier) is well formed: country code, 9-character national code and Luhn check digit.
lei
lei_checker
Check that a Legal Entity Identifier (LEI, ISO 17442) is well formed: 20 characters and MOD 97-10 check digits. Does not confirm the LEI is registered; GLEIF's search does.
loan
loan_repayment_calculator
Monthly repayment, total repaid and total interest on a fixed-rate loan, from the amount, APR and term in months.
mortgage
mortgage_calculator
Monthly repayment mortgage payment, loan-to-value, total interest and interest-only payment from property price, deposit, rate and term.
percentage
percentage_calculator
Three sums: X% of Y ('percent_of'), what percent X is of Y ('what_percent'), and percentage change from X to Y ('change').
profit
profit_margin_calculator
Profit, margin and markup from cost and selling price; or the selling price needed for a target margin.
roi
roi_calculator
Return on investment: profit and ROI % from the amount put in and the amount got back, and the yearly rate if the time in months is given.
sedol
sedol_checker
Check a 7-character SEDOL (UK/Irish security identifier) format and check digit.
swift
swift_code_checker
Check that a SWIFT (BIC) code is well formed and split it into bank, country, location and branch. Has no bank directory.
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://www.sendpaybusiness.com/api/mcp | streamable-http | answering | 948 ms | 4 min ago |
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SendPay free business calculators — questions
Answers built from our own checks of this server.
What can SendPay free business calculators do?
It exposes 21 tools, read directly from the server on our last check. Among them: break_even_calculator, card_fee_calculator, cbu_checker, compound_interest_calculator, cusip_checker, discount_calculator and 15 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 →
What is SendPay free business calculators mostly used for?
Its tools cluster around free and vat. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.
Is SendPay free business calculators working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 61 of 92 checks got a reply (66.3%), average response time 808 ms. The bar chart above shows every period we have measured.
How do I connect SendPay free business calculators?
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 SendPay free business calculators need an API key?
No. SendPay free business calculators completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 21 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is SendPay free business calculators?
It answers our handshake in 808 ms on average, which is faster than 11% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.