MCP connectors by de.syn-tax.actions

syn.tax connects AI assistants to authorized client data, deadlines, assignments, documents and time tracking for German tax advisory firms. DATEV features use the firm's configured connection. Remote MCP over HTTPS with OAuth 2.1 and dynamic client registration; access follows the signed-in user's permissions. A syn.tax account and firm access are required. Official MCP Registry: de.syn-tax/syn-tax. Website and setup: https://syn-tax.de/integrationen.