AuraCalcs MCP server

What it is

The server answers three kinds of questions: what a 2026 paycheck looks like in one of 12 states, what an hourly wage is as gross pay, and what a freelancer owes on 1099 income. The address is https://mcp.auracalcs.com/mcp. The transport is Streamable HTTP. There is no sign-in and no API key. Every tool is read-only.

The hostname root, https://mcp.auracalcs.com/, only points at that endpoint. Calculations for the website still run in your browser. This server is the same math, for an MCP client.

Demo video

A short recording of live calls to the server: the tool list, five example estimates, and three requests it declines. No sound.

Open the demo video (MP4)

Add it in Claude

In Claude, open Settings, then Connectors, then add a custom connector. Paste https://mcp.auracalcs.com/mcp. Leave authentication off. The menu names can differ by Claude version. If you do not see those exact words, look for the place where Claude asks for a remote MCP server URL.

Add it in another MCP client

Choose a remote server, Streamable HTTP, and the same URL. Do not send a token. If the client asks for a command to run on your computer, this server is not that kind. It is already on the network.

Tools

calculate_paycheck

Estimates one 2026 paycheck. Required arguments:

• payBasis: annual, paycheck, or hourly
• amount: dollars before tax
• payFrequency: weekly, biweekly, semimonthly, monthly, or daily
• filingStatus: single, married, or hoh
• state: CA, NY, IL, TX, FL, NV, TN, WY, SD, AK, NH, or WA

Optional arguments: stateAllowances, ilLine2Allowances, hoursPerWeek, weeksPerYear, fedStep2Checkbox, fedStep3Credits, fedStep4a, fedStep4b, fedStep4cExtra, nyLocality (none, nyc, yonkers_resident, yonkers_nonresident), nySdiDeducted, and ytdGross.

Example: New York, $85,000 a year, every two weeks, single, 1 exemption, New York State only, SDI included. The server returns gross $3,269.23, federal income tax $379.62, Social Security $202.69, Medicare $47.40, New York income tax $152.76, NY SDI $1.20, NY PFL $14.12, and take-home pay $2,471.44. Those lines match the New York paycheck calculator.

convert_hourly_to_salary

Turns an hourly wage into gross pay before tax. Arguments: hourly or hourlyRate, hours or hoursPerWeek (default 40), weeks or weeksPerYear (default 52), optional unpaidWeeks when paid weeks are omitted, ot (default 0), and otx (default 1.5).

Example: $25 an hour, 40 hours a week, 52 weeks. Annual gross pay is $52,000. The same formula is on the hourly to salary calculator. This tool does not compute tax.

calculate_1099_tax

Estimates 2026 tax on 1099 income: self-employment tax with its Social Security and Medicare breakdown, federal income tax, an optional flat state rate, the share of each payment to set aside, and the quarterly payment. Same math as the 1099 tax calculator.

Example: $90,000 of 1099 income, $12,000 of expenses, single, 5% state rate. The server returns estimated total tax $19,811, self-employment tax $11,021, federal income tax $5,165, state $3,624, and a quarterly payment of $4,953.

calculate_quarterly_estimated_tax

Applies the IRS safe harbor rules (90% of this year's tax, or 100% or 110% of last year's) and lists the four 2026 due dates. Same math as the quarterly estimated tax calculator.

compare_1099_vs_w2

Compares a 1099 hourly contract with a W-2 salary, counting the extra self-employment tax, 401(k) match, health insurance, paid days off, and business expenses. Returns which pays more and the break-even hourly rate. Same math as the 1099 vs W-2 calculator.

What a response includes

• learnMoreUrl, a link to the matching page on auracalcs.com
• sources, the publication name and URL used for that result
• checkedOn, the date those figures were checked
• disclaimer, stating that the result is an estimate and not tax, legal, or financial advice
• The paycheck lines, or the gross-pay lines for the hourly tool

Paycheck figures are taken from the publications named in the response. For a New York estimate those include IRS Publication 15-T (2026) and NYS-50-T-NYS (2026). Every other state names its own publications the same way, including Alaska unemployment insurance, Washington Paid Family and Medical Leave, and WA Cares. The hourly tool names only the gross-pay page, because it does not apply a tax rate.

Limits

• Paycheck states: California, New York, Illinois, Texas, Florida, Nevada, Tennessee, Wyoming, South Dakota, Alaska, New Hampshire, and Washington. New York estimates single and married filing jointly, and exemptions from 0 to 10.
• Tax year: 2026 withholding methods only.
• Texas, Florida, Nevada, Tennessee, Wyoming, South Dakota, Alaska, New Hampshire, and Washington state income tax is $0.00. Federal income tax and FICA still apply. Alaska adds employee unemployment insurance. Washington adds Paid Family and Medical Leave and WA Cares.
• The result is an estimate, not tax advice, not a filing, and not a determination of tax owed.

Privacy

Inputs are not stored. There is no account. The privacy policy explains the MCP calculator service, including what is not saved and what Cloudflare may log.

Support

Questions and corrections: info.digitallolo@gmail.com.

Disclaimer

AuraCalcs provides estimates for informational and educational purposes only. This is not tax, legal, or financial advice. Read the disclaimer before you rely on a number.