CCH ProSystem fx Suite API
No public API. The CCH ProSystem fx desktop and hybrid suite keeps returns, workpapers, and client data internal, with no developer portal or documented integration surface. Wolters Kluwer is steering customers toward the CCH Axcess cloud instead.
Frequently asked questions
CCH ProSystem fx Suite scores F on the API Report Card. No public API. The CCH ProSystem fx desktop and hybrid suite keeps returns, workpapers, and client data internal, with no developer portal or documented integration surface. Wolters Kluwer is steering customers toward the CCH Axcess cloud instead.
Without a usable official API, teams fall back on manual exports, file drops, or one-off vendor integrations. The other option is an unofficial API layer like Supergood that automates the authenticated web app directly.
CCH ProSystem fx Suite (Wolters Kluwer) is an integrated suite for professional accounting firms covering tax preparation/compliance, audit engagement and workpapers, fixed assets, tax planning, and practice/firm management.
Financial Services / Tax & Accounting Software, Typically for public accounting firms from small (1-19 licenses) to most of the nation's top firms. Firms use ProSystem fx to prepare/file client tax returns, manage audit workpapers and engagements, track fixed assets, and run firm/practice management.
Used by the majority of the largest US accounting firms; one of the dominant professional tax-prep/audit suites alongside Thomson Reuters and Intuit.
Yes, Holds client tax returns, audit workpapers, fixed-asset records, and firm financial data, core system-of-record for accounting firms.
Decades-old (ProSystem fx heritage); largely desktop/hybrid with cloud successor (CCH Axcess). Antiquated stack with slow modernization.
No public API/developer portal found. Data largely siloed within the desktop suite. Full sourced list under Sources below.
Common alternatives include Thomson Reuters UltraTax CS, Intuit Lacerte / ProConnect, Drake Tax, CCH Axcess (WK cloud), Caseware. Graded alternatives appear under "More from the report card" below.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.
Yes. Supergood maintains an unofficial CCH ProSystem fx Suite API and MCP server so AI agents and internal tools can read and write CCH ProSystem fx Suite data. See the CCH ProSystem fx Suite integration docs at supergood.ai/docs/cch-prosystem-fx-suite-api.