# DataButler US Rates Muse connector

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

## DataButler US Rates

Look up current US federal tax brackets, deductions, payroll and retirement limits for 2026

- Record: https://musedirectory.ai/connector/databutler-us-rates
- Category: Finance & Bills
- Developer: physics-star-cat (https://databutler.dev/api)
- 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, 260ms, checked 2026-10-29T10:00:56Z
- Endpoint: https://databutler.dev/api/mcp/us-rates
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-10-28T12:46:13Z)
- Source: Found in the official MCP Registry (io.github.physics-star-cat/databutler-us-rates) https://registry.modelcontextprotocol.io/v0/servers?search=io.github.physics-star-cat%2Fdatabutler-us-rates

Provides sourced US federal tax rates and thresholds for 2026, including income tax brackets by filing status, standard deductions, Social Security and Medicare rates, and retirement contribution limits. Each figure includes its IRS or SSA source URL and verification date.

Example request: "What's the standard deduction for a single filer in 2026?"

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use DataButler US Rates to help me. It is a free service with an MCP server at https://databutler.dev/api/mcp/us-rates. 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:
- us_rates_lookup: Current US federal (tax year 2026) rates and thresholds read from the IRS revenue procedures and notices, SSA's Federal Register notice and irs.gov pages, each figure with its source URL, the quoted sentence or table row, verifiedDate and the prior-year value where one exists. Ca

Screening checks:
- MCP handshake: pass (Answered in 243ms)
- Domain against threat feeds (Cloudflare security DNS): pass (databutler.dev 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 (1 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (No redirects off the domain)
- AI review of purpose and tool behavior: pass (No concerns)