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io.github.physics-star-cat/databutler-facts

io.github.physics-star-cat/databutler-facts · v1.0.0

Measured by MCP Station

Last check	Reachable
Checked at	—
Check success 7 / 30 days	—
First-try success 30 days	—
Median response	—
Lookups 30 days	—
Authentication	No auth
MCP version	2025-06-18
Rank score	—
Declared risk	Read-only (all tools declare readOnlyHint)
Capabilities declared	tools
Tool definitions	3 tools · with description 100% · input schema is an object 100% · read/destructive hints 100%

Official thresholds, rates and fees by key, with source, verified date and signature.

streamable-http · https://databutler.dev/api/mcp/facts

claude mcp add --transport http databutler-facts https://databutler.dev/api/mcp/facts

{
  "mcpServers": {
    "databutler-facts": {
      "url": "https://databutler.dev/api/mcp/facts"
    }
  }
}

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 `<country>/<topic>/<fact>`, e.g. `uk/income-tax/personal-allowance`, `u
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_fact`. Filter by `name
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, Python, Ubuntu, Debi

Repository · Website · JSON · Text for agents · Registry updated 2026-10-13