For AI agents: visit https://developer.fastspring.com/llms.txt for an index of all pages formatted in Markdown and endpoints in OpenAPI. Append .md to any documentation page URL to get its markdown version.
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FastSpring JS
FastSpring.com
August 31st, 2025
Improved
August 2025 Refinements
August 21st, 2025
Added
Enable Payment Hierarchy setting now available
August 12th, 2025
Added
Renewal Invoice: Immediate updates with proration now supported
August 12th, 2025
Added
Transfer subscriptions between accounts via API
July 31st, 2025
Improved
July 2025 Refinements
July 30th, 2025
Added
Returns API now supports partial and item-level refunds
July 24th, 2025
Added
Four new currencies supported
July 24th, 2025
Improved
Navigation updates for a clearer seller experience
July 18th, 2025
Improved
Catalog UI redesign now live
June 30th, 2025
Improved
June 2025 Refinements
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