# SendPay free business calculators Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## SendPay free business calculators

VAT, card fees, loan, mortgage, margin, ROI and break-even calculators for small business

- Record: https://musedirectory.ai/connector/sendpay-free-business-calculators
- Category: Finance & Bills
- Developer: SendPay Business (https://www.sendpaybusiness.com/tools)
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 720ms, checked 2026-10-30T02:11:09Z
- Endpoint: https://www.sendpaybusiness.com/api/mcp
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-10-30T02:11:09Z)
- Source: Found in the official MCP Registry (com.sendpaybusiness.app/free-business-tools) https://registry.modelcontextprotocol.io/v0/servers?search=com.sendpaybusiness.app%2Ffree-business-tools

Collection of 170+ free calculators for small business and freelancers. Includes VAT, card payment fees, profit margin, ROI, loan repayment, mortgage, hourly rate, break-even analysis, and IBAN/SWIFT validation. No sign-up required.

Example request: "Calculate how much to charge a customer to cover a 2.9% card processing fee and still make my target profit margin"

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use SendPay free business calculators to help me. It is a free service with an MCP server at https://www.sendpaybusiness.com/api/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.

Tools:
- 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
- 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%.
- 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.
- profit_margin_calculator: Profit, margin and markup from cost and selling price; or the selling price needed for a target margin.
- 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').
- 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.
- 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.
- compound_interest_calculator: Savings growth with monthly compounding and an optional monthly deposit: final balance, total paid in and interest earned.
- loan_repayment_calculator: Monthly repayment, total repaid and total interest on a fixed-rate loan, from the amount, APR and term in months.
- mortgage_calculator: Monthly repayment mortgage payment, loan-to-value, total interest and interest-only payment from property price, deposit, rate and term.
- 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.
- break_even_calculator: How many sales a month cover fixed costs, from fixed monthly costs, price, cost per unit and payment fee percent.
- 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.
- 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.
- 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.

Screening checks:
- MCP handshake: pass (Answered in 720ms)
- Domain against threat feeds (Cloudflare security DNS): pass (www.sendpaybusiness.com not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: pass (15 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (Domain registered 209 days ago)
- AI review of purpose and tool behavior: pass (No concerns)