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Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

MCP server · Data access / search

SendPay free business calculators

By app.sendpaybusiness.com

Free VAT, card fee, loan, mortgage, margin, ROI and break-even calculators plus IBAN/SWIFT checks

WebsiteMaps, travel & real estate
Connect to SendPay free business calculators
Checks passed
12 / 22

2 failed · 8 not measured

Median response
533 ms

Median of successful probes over 7 days

30-day uptime
Not measured

Share of countable probes over 30 days, including daily rollups. Auth challenges are excluded.

Discovered tools
21

Tool definitions returned by this server

Independent monitoring

Health & checks

Status history

Outdated check

Last connection measurement is over 24 hours old. Current availability is unknown.

Last checked
Check summary by test group
Test areaPassedFailedUnmeasured
ConnectionCan a client connect and discover tools?
500
Reliability & speedDoes it respond consistently and quickly?
004
Access & authenticationWhat is required to use this server?
102
Tool qualityAre the tool definitions usable by an agent?
400
Publisher identityCan the publisher be traced to its source?
222

Unmeasured means there is not enough evidence to decide. How these checks work

Inspect individual checks 22 recorded

Core

  • Pass
    Reachable

    Latest probe returned HTTP 200 in 533 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-11-25, serverInfo.name sendpay-free-tools.

  • Pass
    Lists tools

    tools/list returned 21 tools.

  • Pass
    Current protocol

    Negotiated 2025-11-25. The bar is 2025-06-18 or newer.

  • Pass
    HTTPS

    The endpoint URL is https.

Performance

  • Not measured
    Fast (p50)

    Median latency 533 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 533 ms over 1 samples in 7 days. The bar is 3000 ms. Need at least 20 samples.

  • Not measured
    Reliable (uptime)

    1 of 1 attempts returned a tool list in 30 days (100%). The bar is 99%. Need at least 30 samples.

  • Not measured
    Stable tool list

    Fewer than two successful probes in 30 days, so tool-list stability is not measured.

Access

  • Pass
    Open access

    tools/list succeeded with no credential, and the record declares none.

  • Not measured
    Standard auth

    Auth is not required, so the OAuth metadata check does not apply.

  • Not measured
    Free tier cited

    No publisher quote has been checked.

Tools

  • Pass
    Tools described

    Every tool description is at least 20 characters.

  • Pass
    Valid input schemas

    Every inputSchema is a JSON Schema object.

  • Pass
    Parameters documented

    50 of 50 parameters have a description (100%). The bar is 80%.

  • Pass
    Safety hints

    Every tool sets readOnlyHint or destructiveHint.

Publisher

  • Pass
    Verified namespace

    Listed in the Official MCP Registry.

  • Fail
    Website matches publisher

    The website host does not match the reverse-domain namespace.

  • Fail
    Source repo linked

    No repository URL is on file.

  • Not measured
    Repo owner matches

    This namespace is not an io.github login, so the owner comparison does not apply.

  • Pass
    Recently updated

    Updated 2026-10-27T04:13:03.610933Z, within 180 days.

  • Not measured
    Open-source licence

    No GitHub repository to ask about a licence.

Start using SendPay free business calculators

Connect to this server

Choose your client, copy the configuration, then enable the server in your client’s MCP settings.

Run this command in your terminal, then restart Claude Code.

Claude Code

claude mcp add --transport http sendpay-free-business-calculators https://www.sendpaybusiness.com/api/mcp

Capabilities

Tools 21

break_even_calculator

How many sales a month cover fixed costs, from fixed monthly costs, price, cost per unit and payment fee percent.

Discovered
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.

Discovered
cbu_checker

Check an Argentine CBU or CVU: 22 digits and both check digits, split into bank, branch and account.

Discovered
compound_interest_calculator

Savings growth with monthly compounding and an optional monthly deposit: final balance, total paid in and interest earned.

Discovered
cusip_checker

Check a 9-character CUSIP (US/Canadian security identifier) check digit and split it into issuer and issue.

Discovered
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.

Discovered
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.

Discovered
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.

Discovered
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.

Discovered
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.

Discovered
isin_checker

Check that an ISIN (ISO 6166 security identifier) is well formed: country code, 9-character national code and Luhn check digit.

Discovered
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.

Discovered
loan_repayment_calculator

Monthly repayment, total repaid and total interest on a fixed-rate loan, from the amount, APR and term in months.

Discovered
mortgage_calculator

Monthly repayment mortgage payment, loan-to-value, total interest and interest-only payment from property price, deposit, rate and term.

Discovered
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').

Discovered
profit_margin_calculator

Profit, margin and markup from cost and selling price; or the selling price needed for a target margin.

Discovered
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.

Discovered
sedol_checker

Check a 7-character SEDOL (UK/Irish security identifier) format and check digit.

Discovered
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.

Discovered
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.

Discovered
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%.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected533 ms21

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