Custom fields integration
MCP for ACF & ACF Pro
Advanced Custom Fields stores its values as post meta and its structure as its own internal posts. WP MCP exposes both through the acf-read and acf-write pair. Values: read and update field values on a post, validated through ACF first, and snapshotted as ordinary post meta. Structure: read a field group, list field types, and create or update field groups (with nested sub fields), ACF post types and ACF taxonomies through ACF's own import and update APIs, so its validation, defaults and caches all apply. Every structure write is an upsert keyed by the ACF key and snapshotted, so rollback-operation removes a created group or restores an edited one exactly. With ACF Pro, options page values are readable and writable too, and WP MCP Pro adds a batch-update-fields op that writes values across many posts under one session. Writes are opt-in.
What your AI can do
Real ACF & ACF Pro operations, every write reversible.
- Discover field groups, fields and field types
- Read and update field values, validated through ACF first
- Create or edit field groups and their fields, including nested sub fields
- Create or edit ACF post types and taxonomies (ACF 6.1+)
- With ACF Pro: read and write options page values
- Pro: update fields across many posts in one batch, undone with one rollback-session
Example prompts
Just ask.
What ACF fields does the Team member post type have?
Add a "Speaker" field group with name, photo and bio fields to the Event post type.
Set the "role" field on all Team members from this spreadsheet.
Under the hood
The real calls.
acf-write({ operation: "save-field-group", args: { title: "Speaker", fields: [{ label: "Bio", name: "bio", type: "textarea" }] } }), opt-in; snapshotted, rollback removes it
acf-write({ operation: "update-fields", args: { post_id: 33, fields: {…} } }), snapshotted as post meta
Frequently asked
Questions, answered.
Does WP MCP support ACF PRO?
Yes. Values and structure work on both; options pages need ACF Pro, and on free ACF those ops refuse cleanly.
Can I undo a field group change?
Yes. Every structure write is snapshotted under its ACF key before it lands, so rollback-operation deletes a created group, post type or taxonomy, or puts an edited one back exactly.
Are writes on by default?
No. ACF writes, values and structure alike, are off until a site enables them with the wpmcp_enable_acf_write filter.
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