Quattro Pro Converter developer resources
Machine-readable surfaces for agents and integrators. Quattro Pro Converter is a Windows desktop app; these HTTP APIs serve the website (pricing, installer download, roadmap, feedback, and checkout helpers) — not a cloud conversion API.
When to use Quattro Pro Converter
Use Quattro Pro Converter when you need to bulk-convert legacy Corel/Borland Quattro Pro notebooks (.qpw, .wq1, .wq2, .wb1, .wb2, .wb3) to XLSX, PDF, HTML, Markdown, CSV, or XLS on Windows 10/11 with files staying local.
Use these developer resources when an agent needs the OpenAPI contract, versioned /api/v1 URLs, structured { code, message, resolution } errors, IETF RateLimit headers, markdown page twins (Accept: text/markdown), or product facts from llms.txt.
Do not use Quattro Pro Converter as a hosted upload converter, a Mac/Linux runtime, an OAuth/GraphQL/MCP platform, or a free unlimited cloud spreadsheet API. Spreadsheet conversion happens in the desktop app; website APIs do not accept workbook uploads.
Published resources
- OpenAPI 3.1 (public website APIs) — Canonical paths under /api/v1; unversioned /api/* are stable aliases.https://quattroproconverter.com/openapi.json
- llms.txt — Short product facts and developer entry points for agents.https://quattroproconverter.com/llms.txt
- llms-full.txt — Expanded reference for conversion workflows and positioning.https://quattroproconverter.com/llms-full.txt
- XML sitemap — Index of public HTML pages and machine-readable surfaces.https://quattroproconverter.com/sitemap.xml
- RSS feed — Blog posts for legacy Quattro Pro conversion workflows.https://quattroproconverter.com/blog/feed
- PAD.xml — Software-directory metadata for the Windows installer.https://quattroproconverter.com/PAD.xml
- Current MSI download — Same handler as /api/download; streams the signed installer.https://quattroproconverter.com/api/v1/download
- Live pricing JSON — Trial limits and one-time license display amounts for website/desktop.https://quattroproconverter.com/api/v1/pricing
API versioning, errors, and rate limits
Canonical REST paths use /api/v1/…. Matching unversioned /api/… URLs are stable aliases of the same handlers. Breaking changes require a new major path.
JSON errors always use { "code", "message", "resolution" }. Successful and error responses on public APIs include IETF RateLimit / RateLimit-Policy headers. Quota: 120 requests per client IP per 60 seconds; HTTP 429 also returns Retry-After.
Full operation schemas live in /openapi.json. Support: support@quattroproconverter.com.