About Tax Numbers
Tax Numbers is a read-only MCP server for retrieving US federal tax figures and the IRS documents that source them. It is intended for office and administrative workflows.
Key features
- 01US federal tax figures
- 02Source IRS documents for figures
Use cases
- 01Look up federal tax figures for administrative work
- 02Check the IRS document behind a tax figure
MCP support
It exposes tax figure lookup through https://tax.openkrill.app/mcp. The server is public, read-only, and requires no key.
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://tax.openkrill.app/mcpclaude mcp add --transport http app-openkrill-tax https://tax.openkrill.app/mcp{"mcpServers":{"app-openkrill-tax":{"type":"http","url":"https://tax.openkrill.app/mcp"}}}Open in Cursor{"servers":{"app-openkrill-tax":{"type":"http","url":"https://tax.openkrill.app/mcp"}}}Open in VS Code{"mcpServers":{"app-openkrill-tax":{"type":"http","url":"https://tax.openkrill.app/mcp"}}}{"mcpServers":{"app-openkrill-tax":{"serverUrl":"https://tax.openkrill.app/mcp"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
Tools
7| Parameter | Type | Required | Description |
|---|---|---|---|
| year | integer | Yes | The tax year (the year the income was earned), for example 2026. Available: 2025, 2026. |
| topic | enum | Yes | Which table: brackets, standard_deduction, mileage, retirement_limits, capital_gains, self_employment, or all.brackets | standard_deduction | mileage | retirement_limits | capital_gains | self_employment | all |
| filing_status | enum | No | single, mfj (married filing jointly), mfs (married filing separately) or hoh (head of household). Leave out for every status.single | mfj | mfs | hoh |
Details
From the project READMEOffice and Admin Tools
Business days and holidays, US tax figures, EU VAT and company registries, document files, ready-to-send links, weekly lane plans and an AI-native team scorecard.
claude plugin install office@openkrill
| Skill and MCP server | Tool | Endpoint |
|---|---|---|
business-days | Business Days & Workday Calc | https://businessdays.openkrill.app/mcp |
tax | Tax Numbers | https://tax.openkrill.app/mcp |
eu-business | EU Business & VAT Checker | https://eubusiness.openkrill.app/mcp |
docs | Document Tools | https://docs.openkrill.app/mcp |
send-out | Send Out | https://sendout.openkrill.app/mcp |
lane-planner | Lane Planner | https://lanes.openkrill.app/mcp |
tenrung | Tenrung | https://tenrung.openkrill.app/mcp |
Every server is public, read-only and needs no key. Generated from the Agent Tools plugin listings; edits made here are overwritten.
Comments
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