About databutler-facts
Official thresholds, rates and fees by key, with source, verified date and signature
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://databutler.dev/api/mcp/factsclaude mcp add --transport http physics-star-cat-databutler-facts https://databutler.dev/api/mcp/facts{"mcpServers":{"physics-star-cat-databutler-facts":{"type":"http","url":"https://databutler.dev/api/mcp/facts"}}}Open in Cursor{"servers":{"physics-star-cat-databutler-facts":{"type":"http","url":"https://databutler.dev/api/mcp/facts"}}}Open in VS Code{"mcpServers":{"physics-star-cat-databutler-facts":{"type":"http","url":"https://databutler.dev/api/mcp/facts"}}}{"mcpServers":{"physics-star-cat-databutler-facts":{"serverUrl":"https://databutler.dev/api/mcp/facts"}}}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
3| Parameter | Type | Required | Description |
|---|---|---|---|
| key | string | Yes | one key, or several separated by commas (max 50), e.g. uk/income-tax/personal-allowance |
| as_of | string | No | optional YYYY-MM-DD: the value in force that day |
| period | string | No | optional period label instead of as_of, e.g. 2025-26 |
| max_age | string | No | optional freshness bar: 30d, 12w, 6m, 1y or ISO 8601 (P30D) |
Details
The maintainer has not added details yet. Check the README in the repository.
Comments
New to MCP?
From what the protocol is to installing your first server, these answers cover most first questions.
An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.