messenger_room_create_get

publ Reference
# messenger_room_create_get

Read the current prerequisites for creating one paid basic-group room in the selected channel's installed D00003 messenger. This read creates no room, catalog or product and activates no monetization.

Connected source: Only this method and [messenger_room_create_apply](messenger_room_create_apply.md) are exposed by this Messaging connection. The source registry has 155 operations; the older recorded 145-tool runtime is historical. Use current endpoint discovery.

## Input and access

The strict input accepts only channelCode. D00003 and the verified installation are resolved by the host; do not supply pAppCode, an installation ID, thumbnailUploadTaskId, a service URL or credentials. OWNER or a DELEGATEE with MANAGE_P_APPS is required. Creator access is excluded. Current environment, selected channel, operator, permissions and credential version remain bound to the task.

The connected transport requires a separate explicit MES origin (`PUBL_MES_API_ORIGIN` or local profile mesApiOrigin), with no guessed API fallback or inherited origin from another environment. MCP forwards the explicit PUBL_MES_API_ORIGIN through the adapter. Missing/empty configuration remains absent; invalid origins are rejected. Missing authenticated transport yields AUTH_REQUIRED. An installed app or configured origin alone does not prove actual service compatibility.

## Inputs

| Field | Required here | Contract |
| --- | --- | --- |
| `thumbnailUploadTaskId` | No | string; pattern `^[A-Za-z0-9_-]{8,80}$`; A completed creation-bound messenger_room_thumbnail_apply task to create the room with its image. |

## Result

MESSENGER_CREATION_CONTEXT returns revision, exact messenger settings, complete current membership candidates, existing point branding or null, monetizationActive, priceLimits and the original default thumbnail. writesPerformed is false. Membership choices are read with a bounded complete inventory of up to 20 pages of 100; incomplete or foreign/duplicate records are rejected. The monetization key is reduced to a boolean and is neither returned nor journaled.

Copy revision into apply.expectedRevision and select membership business IDs from candidates. A creation needs at least one current membership, a new individual access product, or both. It requires an active messenger. The read can describe inactive monetization; apply requires explicit acknowledgement to continue in that state and does not activate it. Failed branding/key reads are errors, not proof that either is absent.

The current priceLimits determine the channel's KRW/USD minimum, maximum and step. Existing branded points are required for CASH_AND_CP.

A validated current result may link to the exact channel's D00003 basic-group creation screen. That link and read confirmation do not mean a room was created. Retain the returned navigation URL instead of constructing one.

## Input example

Replace the illustrative channel code with an approved target.

```json
{"channelCode":"selected-channel"}
```

Continue with [the complete creation input and recovery contract](messenger_room_create_apply.md). For unified hosted access, these are business operation names passed to execute, subject to the connected endpoint's [discovery and scope](../reference/unified-hosted.md).