OSVcalc
Czech OSVČ tax calculator: income tax, social and health insurance, VAT, paušální daň.
Connect it
Settings → Connectors → Add custom connector
URL: https://osvcalc.cz/api/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://osvcalc.cz/api/mcp{
"mcpServers": {
"osvcalc": {
"url": "https://osvcalc.cz/api/mcp"
}
}
}claude mcp add --transport http osvcalc https://osvcalc.cz/api/mcp{
"servers": {
"osvcalc": {
"type": "http",
"url": "https://osvcalc.cz/api/mcp"
}
}
}2 tools, verified live
calculate_osvc_taxesread-onlyComputes the 2026 income tax, social and health insurance doplatek for a Czech OSVÄ (self-employed person), given what they've been paid so far this year and their situation. Also returns VAT registration status, a regime comparison, next year's advances, and a filing guide, with an explanation in the requested locale. Income counts when it's actually received into the account, not when it was in
get_field_guideread-onlyReturns every field calculate_osvc_taxes accepts, grouped the way the web calculator groups them, with the same label and explanation shown in its tooltips. Use this to explain an option to the user before they've decided on a value, without running a calculation.
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