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US federal 2026 tax brackets, standard deductions, payroll and retirement limits, sourced.
npx @getmcp/cli add io.github.physics-star-cat/databutler-us-ratesRequires Node.js 18+. Community-contributed server. Review source before installing.
Config file: ~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"io.github.physics-star-cat/databutler-us-rates": {
"url": "https://databutler.dev/api/mcp/us-rates",
"transport": "streamable-http"
}
}
}