Custom fields integration

MCP for Meta Box

Meta Box stores custom field values as ordinary post meta, reached through its public rwmb_meta and rwmb_set_meta functions. WP MCP exposes those to your AI agent as a read/write dispatcher: list the registered meta boxes and their fields, read a post's field values by key, and set field values. Writes are default-off and snapshotted on the post, so every change is one click from undone.

Get the free plugin Read the docs

metabox-readmetabox-writelist-meta-boxesget-fieldsupdate-fields

What your AI can do

Real Meta Box operations, every write reversible.

List registered meta boxes with their fields and post types
Read a post's Meta Box field values by key
Set Meta Box field values (opt-in), snapshotted on the post
Roll back any field write, since values are ordinary post meta

Example prompts

Just ask.

What Meta Box fields does the Team post type have?

Read the subtitle and rating fields on post 42.

Set the subtitle on the About page to this new line.

Under the hood

The real calls.

wpmcp, meta-box

metabox-read({ operation: "get-fields", args: { post_id: 42, keys: ["subtitle", "rating"] } }), read field values by key

metabox-write({ operation: "update-fields", args: { post_id: 42, fields: { subtitle: "New" } } }), opt-in, snapshotted, reversible

Frequently asked

Questions, answered.

Are Meta Box writes reversible?

Yes. Meta Box values are ordinary post meta, so the standard post snapshot captures them and rollback-operation restores them exactly. Writes are also default-off until you enable them with the wpmcp_enable_metabox_write filter.

Do I need Meta Box Pro?

No. The integration uses Meta Box's standard rwmb_meta / rwmb_set_meta API, available in the free plugin.

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