diff --git a/.changeset/action-method-example-data-door-path.md b/.changeset/action-method-example-data-door-path.md
new file mode 100644
index 0000000000..cdf7fae0ab
--- /dev/null
+++ b/.changeset/action-method-example-data-door-path.md
@@ -0,0 +1,40 @@
+---
+"@objectstack/spec": patch
+---
+
+fix(spec): `ActionSchema.method`'s worked example now names the shipped data door
+
+The `method` docblock's only worked example of a `type: 'api'` PATCH pointed at
+`/api/v1/sys_api_key/{id}` — a path the router never mounts. The shipped data
+door composes as `getApiBasePath()` + `crud.dataPrefix` + `/:object/:id`, so the
+update endpoint is `PATCH /api/v1/data/:object/:id` on a default host. The `/data`
+segment was missing, and nothing catches the difference at authoring time:
+`objectstack validate` does not check `target`, `type: 'api'` has no author-time
+route validation, and the action parses green, renders, is clickable, and 404s at
+the click — the same silent shape as an unregistered handler, arriving through a
+doc example. This mattered more than an ordinary stale comment because it is the
+one worked example of that route on the published contract.
+
+The example now reads `/api/v1/data/sys_api_key/${ctx.recordId}`. The object name
+is unchanged on purpose — the error was the path STRUCTURE, not which object the
+example picks — and the id is spelled with the `${ctx.X}` interpolation that
+`target`'s own docblock documents, so the two placeholder conventions in this one
+schema stop reading as interchangeable (a bare `{recordId}` is `newTabUrl`'s
+convention alone).
+
+Two things the corrected example now says that the old one did not:
+
+- **The full path is host-dependent.** Under `enableProjectScoping` with
+  `projectResolution: 'required'` only
+  `/api/v1/environments/:environmentId/data/:object/:id` is registered, so even a
+  correctly spelled unscoped path still 404s on such a host. An author copying a
+  full path needs to know which base their host mounts.
+- **A single-record field write has a declarative form now.** `operation: 'update'`
+  with `patch` writes the current record on the data plane as the caller, with no
+  endpoint, method or id placeholder to spell. The `type: 'api'` + `PATCH` form
+  remains the way to call an explicit endpoint.
+
+Documentation only: no schema member, no `.describe()` and no runtime behaviour
+changes. It is a `patch` rather than a `skip-changeset` because the corrected text
+publishes — `@objectstack/spec` ships `dist/**` and `src/**/*.zod.ts`, and both
+carry this docblock.
diff --git a/packages/spec/src/ui/action.zod.ts b/packages/spec/src/ui/action.zod.ts
index c21a6e06ab..56dd841865 100644
--- a/packages/spec/src/ui/action.zod.ts
+++ b/packages/spec/src/ui/action.zod.ts
@@ -1397,8 +1397,27 @@ const actionObject = () => strictObject({
   ]).optional().describe('Body wrapping: flat (default) or { wrap: key } to nest user-collected params under a key.'),
   /**
    * HTTP method to use when `type: 'api'`. Defaults to `POST`. Use `PATCH` to
-   * call data-API update endpoints (e.g. `/api/v1/sys_api_key/{id}` with
-   * `bodyExtra: { revoked: true }`).
+   * call data-API update endpoints. The shipped data door is
+   * `PATCH {apiBase}/data/:object/:id` — `getApiBasePath()` + `crud.dataPrefix`,
+   * i.e. `/api/v1` + `/data` on a default host — so the endpoint for one
+   * record is e.g. `/api/v1/data/sys_api_key/${ctx.recordId}` with
+   * `bodyExtra: { revoked: true }`. Two things the path depends on: the
+   * `/data` segment (omit it and the action renders, is clickable, and 404s
+   * at the click), and the `${ctx.X}` / `${param.X}` interpolation
+   * {@link target} documents — a bare `{recordId}` placeholder is
+   * {@link newTabUrl}'s convention alone and is not substituted here.
+   *
+   * The full path is host-dependent: under `enableProjectScoping` with
+   * `projectResolution: 'required'` only
+   * `/api/v1/environments/:environmentId/data/:object/:id` is registered, so
+   * an unscoped path 404s on such a host — write `target` against the base
+   * the host actually mounts.
+   *
+   * To write a field on the CURRENT record, prefer the declarative
+   * {@link operation} `'update'` with {@link patch}: the platform performs
+   * the write, so there is no endpoint, method or id placeholder to spell at
+   * all. The `type: 'api'` + `PATCH` form above remains the way to call an
+   * explicit endpoint.
    */
   method: z.enum(['POST', 'PATCH', 'PUT', 'DELETE']).optional().describe('HTTP method for type:"api" actions. Defaults to POST.'),
   /**