API Reference
Last updated Aug 15th, 2026 | Page history | Improve this page | Report an issue
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Learn moreBrowse the generated PHP class documentation at api.modx.com.
The published tree covers MODX Revolution 2.2. Signatures there match the 2.x era. For MODX 3, use that site for orientation and confirm behavior in the revolution 3.x source when something looks off.
Useful entry points:
Narrative guides for the same APIs live under Extending MODX and the xPDO section.
Support the team building MODX with a monthly donation.
The budget raised through OpenCollective is transparent, including payouts, and any contributor can apply to be paid for their work on MODX.
Backers
Budget
$194 per month—let's make that $500!
Learn more