# Data Butler Muse connector From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta. ## Data Butler Current UK tax rates, exam specs, salary calculators, and verified facts that change after AI training cutoffs. - Record: https://musedirectory.ai/connector/data-butler - 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, 257ms, checked 2026-10-29T09:30:53Z - Endpoint: https://databutler.dev/api/mcp - Auth: No account needed; Pricing: unknown - Screening: Screened, no issues found (2026-10-28T20:17:02Z) - Source: Found in the official MCP Registry (io.github.physics-star-cat/databutler) https://registry.modelcontextprotocol.io/v0/servers?search=io.github.physics-star-cat%2Fdatabutler Provides verified UK income tax, National Insurance, minimum wage, student loans, VAT, ISAs, pensions and stamp duty rates for 2026-27. Includes GCSE exam paper lookups, take-home pay calculators for 10 countries, domain and package provenance checks, and alerts on what changed since your training date. Example request: "What's my take-home pay on a 50,000 pound salary in England, and what are the current UK income tax thresholds?" How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Data Butler to help me. It is a free service with an MCP server at https://databutler.dev/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: - uk_rates_lookup: Current UK (2026-27) rates and thresholds, verified against gov.uk with source URLs and verification dates. Categories: income-tax, national-insurance, minimum-wage, student-loans, vat, isa, state-pension, state-pension-age, stamp-duty, capital-gains, pensions, dividends, savings - exam_topic_paper: Which exam paper is a topic on? The canonical student revision question ("is electricity paper 2 AQA?" — answer: no, Paper 1). Input a topic plus optional board/subject/level; returns the paper, sibling topics on that paper, spec code, and the official spec URL. Knows quirks like - domain_provenance: Who runs this domain? Live RDAP lookup: registration date and age, registrar, nameservers, status, whether the registrant is redacted, plus a typosquat check (edit-distance / brand-substring) against high-value brands. A very recently registered domain resembling a bank or big br - package_provenance: Who publishes this package, and is it a typosquat? Live npm or PyPI lookup: first-publish date and age, release count, latest version, maintainers/author, linked repo, plus a typosquat check against popular package names. Use when an agent is about to install or recommend an unfa - take_home_pay: Net salary after income tax and social contributions for an employee in one of ten countries (uk, us, ca, au, in, br, pl, fr, de, es), computed live by the LifeByNumbers salary calculators (same operator). Takes a gross salary in local currency (annual by default, or monthly with - what_changed_since: What has changed in Data Butler's verified datasets since a date — pass your training-cutoff date to learn which UK tax/NI/benefit thresholds, exam-spec facts, official vehicle datasets (UK DVSA, French RappelConso and Japanese MLIT recalls), software end-of-life dates (Node.js, - get_fact: The current value of one official figure by key — a tax threshold, rate, allowance, fee, deadline, limit or policy rate — with the date it was verified, the official source URL, the period it applies to and a signature. Keys are `//`, e.g. `uk/income-tax/per - resolve_fact: Ranked canonical fact keys for a plain-language question or a guessed key — "NI primary threshold", "ECB deposit rate", "passport renewal fee" — each with label, unit, period and verification date, and the full record of the top match when it is unambiguous. The keys feed `get_fa - coverage: Exactly what Data Butler covers and does not, per area, including figures it does not serve yet. Areas: uk-rates, uk-exams, provenance, stats, vehicles, tax, software-eol, policy-rates, us-rates, de-rates, uk-vehicle-rules, uk-exam-dates, calendar, uk-gov-process, jp-vehicle-cost - catalogue: Every tool across all Data Butler servers (UK rates; UK exams; provenance; exact statistics; vehicles: UK MOT, UK, French and Japanese recalls; take-home pay for ten countries; software support status and end-of-life timelines for 14 runtimes and operating systems; central-bank p - call: Run any Data Butler tool by name — the long tail not listed here: exam_spec_lookup, exam_paper_index; exact statistics (distribution, hypothesis_test, confidence_interval, bayes_update, linear_regression, descriptive_stats); the vehicles hub (uk_mot_reliability, uk_recalls_for_mo Screening checks: - MCP handshake: pass (Answered in 238ms) - 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 (9 tools read, nothing found) - Inputs asking for passwords, card numbers or seed phrases: pass (None found) - Domain and redirects: pass (Domain registered 34 days ago) - AI review of purpose and tool behavior: pass (No concerns)