# Plain MCP MCP Vendor: Plain MCP Category: other Auth: OAUTH2 Composio slug: `plain_mcp` Read and manage Plain support threads, customers, tenants, broadcasts, help-center content, Sidekick sessions, and workspace settings through Plain's hosted MCP server. ## Tools - **Addgeneratedreply** — Add an AI-generated reply suggestion to a thread. Required fields: - threadId: The ID of the thread to add the generated reply to. - timelineEntryId: The ID of the timeline entry to associate the reply with. - markdown: The markd - **Addlabels** — Add labels to a thread by label type IDs. Labels are used to categorize and organize threads. - **Archivelabeltype** — Archive a label type to hide it from the active label list. Archived label types are no longer available for selection but existing labels remain on threads. Use this to deprecate label types without losing historical data. - **Assignthread** — Assign a thread to a user or machine user. Provide either userId or machineUserId, not both. If neither is provided, the thread will be assigned to the authenticated user. - **Bulkupsertthreadfields** — Bulk upsert (create or update) multiple thread field values in a single operation. Provide an array of thread field inputs, each with thread ID, field key, field type, and value. Use this to efficiently set multiple custom fields on one o - **Changethreadpriority** — Change the priority of a thread. Priority is an integer: 0 = urgent, 1 = high, 2 = normal, 3 = low. - **Createbroadcast** — Create a new broadcast: a message authored once and posted to many Slack channels at once. Creating one never sends it — a new broadcast is a DRAFT, and scheduling the real send is done by a human in the Plain app. Required input fields - **Createbroadcastaudience** — Create a reusable broadcast audience: a named set of broadcast recipients, resolved to concrete Slack channels at send time rather than when saved. Required input fields: `name`, `type`, `filters`. - `name` identifies the audience inte - **Createlabeltype** — Create a new label type for organizing threads. Label types can be single-select or multi-select, and can be hierarchical with parent label types. Use this to add new labels to your workspace's label taxonomy. - **Createnote** — Create an internal note on a thread. Notes are visible to support agents only, not to customers. Requires a customerId and text content. Optionally provide a threadId to attach the note to a specific thread, and markdown for rich formatt - **Createsnippet** — Create a new snippet (reusable reply template) in the workspace. `name` is what agents search for when inserting the snippet. `text` is the plain-text body (required). Optionally provide `markdown` for rich-text channels, and `path` (alp - **Createthread** — Create a new thread for a customer. A thread is the unit of conversation in Plain. Use this when you need to open a new ticket on behalf of a customer (for example, capturing an internal report or a back-channel conversation). To send a - **Createthreadfieldschema** — Create a new thread field schema to capture structured data on threads. Thread field schemas define custom fields that can be added to threads (e.g., priority score, department, due date). Supports text, number, boolean, date, and enum fi - **Createthreadlink** — Link a thread to an external entity (e.g. a Linear issue, Jira issue, incident.io incident, or another Plain thread/task). Provide the `threadId` plus exactly one way to identify the link target: - `linearIssue`: link a Linear issue ( - **Createworkspaceslackintegrationfromauth** — Connect workspace Slack notifications using a Slack connection the workspace already has. There is no second OAuth install. Pass the id of an existing workspace Slack channel integration (`workspaceSlackChannelIntegrations`). Requires `wo - **Deletebroadcast** — Soft-delete a broadcast. Deleted broadcasts are excluded from `getBroadcasts` and `searchBroadcasts` but remain fetchable by ID with `getBroadcastDetails`, where `isDeleted` is true — so the record of what was sent survives. Deleting a - **Deletebroadcastaudience** — Soft-delete a broadcast audience. Deleted audiences are excluded from `getBroadcastAudiences` but stay fetchable by ID with `getBroadcastAudienceDetails`, so the record of what a past broadcast was sent to survives. Rejected with `cann - **Deletethreadfieldschema** — Delete a thread field schema from the workspace. This will remove the field schema and all associated thread field values from threads. Use this carefully as it permanently removes data. - **Deletethreadlink** — Remove a link between a thread and an external entity. Pass the `threadLinkId` of the link to delete (the `id` returned by `createThreadLink` or listed under a thread's `links` in `getThreadDetails`). - **Getattachmentdownloadurl** — Generate a short-lived download URL for an attachment on a thread. Use attachment IDs returned by getThreadDetails (in the attachments field of timeline entries such as NoteEntry, ChatEntry, EmailEntry, SlackMessageEntry, etc.). The ret - **Getbroadcastaudiencedetails** — Fetch a single broadcast audience by its ID, or null if no audience with that ID exists. Returns soft-deleted audiences (where `isDeleted` is true), so the record of what a past broadcast was sent to survives. In `filters`, dimensions o - **Getbroadcastaudiences** — Fetch a paginated list of the workspace's broadcast audiences, newest first. An audience is a named, reusable set of broadcast recipients, resolved to concrete Slack channels at send time rather than when it was saved. Soft-deleted audie - **Getbroadcastdetails** — Fetch a single broadcast by its ID, including its authored content and who it is targeted at. Returns null if no broadcast with that ID exists, and returns soft-deleted broadcasts (where `isDeleted` is true). `content` is encoded as `co - **Getbroadcasts** — Fetch a paginated list of the workspace's broadcasts, newest first. A broadcast is a message authored once and posted to many Slack channels at once. Soft-deleted broadcasts are excluded from this list. Optionally narrow the list with `s - **Getbroadcastsenddeliveries** — Fetch the individual recipients of one broadcast send — which channel got the message, which did not, and why. Use this to answer "who missed it" or "did this channel get it". A delivery is one recipient's copy of the broadcast within o - **Getbroadcastsends** — Fetch the send history of one broadcast, newest first. Use this to answer "has this broadcast gone out, and how far did each run get". One send is one run of the broadcast. A broadcast that has been sent once and tested twice has three - **Getcustomerdetails** — Fetch detailed information about a specific customer by their ID. Returns the customer's profile including email, avatar, assignment, company, and timestamps. - **Getcustomers** — Fetch a paginated list of customers from Plain. Results are sorted by full name and exclude customers marked as spam. Use the `cursor` variable with the endCursor from the previous response's pageInfo to fetch the next page. The cursor i - **Getcustomerthreads** — Fetch first 10 threads for a specific customer. Use this to see a customer's full support history. Optionally filter by status or sort by different criteria. Use the `cursor` variable with the endCursor from the previous response's page - **Gethelpcenterarticle** — Fetch detailed information for a specific help-center article by ID. Help-center article URL format (Plain dashboard): https://app.plain.com/workspace/{workspaceId}/help-center/{helpCenterId}/articles/{helpCenterArticleId}/ where {helpC - **Gethelpcenterarticlebyslug** — Fetch detailed information for a specific help-center article by slug. Help-center article URL format (Plain dashboard): https://app.plain.com/workspace/{workspaceId}/help-center/{helpCenterId}/articles/{helpCenterArticleId}/ where {hel - **Gethelpcenterarticlegroups** — Fetch a paginated list of article groups for a specific help center. Use the `cursor` variable with the endCursor from the previous response's pageInfo to fetch the next page. The cursor is an opaque token: pass it back unchanged and do - **Gethelpcenterarticles** — Fetch a paginated list of articles for a specific help center. Use the `cursor` variable with the endCursor from the previous response's pageInfo to fetch the next page. The cursor is an opaque token: pass it back unchanged and do not co - **Gethelpcenters** — Fetch a paginated list of help centers. Use the `cursor` variable with the endCursor from the previous response's pageInfo to fetch the next page. The cursor is an opaque token: pass it back unchanged and do not construct, modify, or alt - **Getlabels** — Fetch a paginated list of label types from Plain. Useful for fetching the label type ID's necessary for mutations like 'addLabels'. Results exclude archived labels by default. Use the `cursor` variable with the endCursor from the previou - **Getmyassignedthreads** — Fetch first 10 threads assigned to a specific user in Plain. By default, returns only active threads (TODO and SNOOZED), excluding DONE threads. To include all threads regardless of status, pass statuses: null. To filter by specific stat - **Getmyuser** — Get the currently authenticated user's details. This query uses implicit authentication - no parameters are needed. Returns the user associated with the current session. - **Getmyworkspace** — Get the currently authenticated user's workspace details. This query uses implicit authentication - no parameters are needed. Returns the workspace associated with the current session. The returned `id` (e.g. `w_01G0EZ1XTM37C5X11SQTDNCTM - **Getsidekicksession** — Poll a Sidekick session: read its status, its newest messages, and any approval it is blocked on. Call this repeatedly after startSidekickSession or sendSidekickMessage. discussionId is the `thdis_...` handle returned by startSidekickSes - **Getsnippet** — Fetch a single snippet by ID, including soft-deleted snippets (where `isDeleted` is true). Use this when you already have a snippet ID (starts with `sn_`) from `getSnippets` or another tool. Do not invent IDs — only use values returned - **Getsnippets** — Fetch a paginated list of snippets from the workspace. Snippets are reusable reply templates that agents insert when composing replies. Soft-deleted snippets are excluded from this list. Use the `cursor` variable with the endCursor from - **Gettenantdetails** — Fetch detailed information about a specific tenant by their ID. Returns the tenant's profile including name, external ID, source, tier, and tenant fields. - **Gettenants** — Fetch a paginated list of tenants from Plain. Results include tenant name, external ID, source, and associated tier. Use the `cursor` variable with the endCursor from the previous response's pageInfo to fetch the next page. The cursor is - **Getthreaddetails** — Fetch complete details for a specific thread including first 50 timeline entries. Timeline entries include notes, chats, emails, status changes, assignments, and more. Use the `timelineCursor` variable with the endCursor from the previous - **Getthreadfieldschemas** — Fetch a paginated list of thread field schemas from Plain. Thread field schemas define the custom fields available for threads in your workspace. Use the `cursor` variable with the endCursor from the previous response's pageInfo to fetch - **Getthreadknowledgesourcecitations** — Fetch the knowledge sources cited by AI agent replies on a thread. Currently only Ari, Plain's AI support agent, produces citations. Each citation is linked to the timeline entry the citing reply is rendered as: correlate `timelineEntryId - **Getthreads** — Fetch threads with flexible filtering options. Use this to find first 10 threads by status, status details, assignee, customer, tenant, labels, priority, or date ranges. Set isAssigned: false to get unassigned threads. Set isAssigned: tr - **Getuserbyemail** — Look up a Plain user by their email address. Returns user details including ID, name, role, and status. - **Listsidekicksessions** — List Sidekick sessions in the workspace, most recent activity first. Use this to resume a session from an earlier conversation, to check whether a session you started actually landed after a timeout, or to find sessions that need attenti - **Markcustomerasspam** — Flag a customer as spam. This hides their threads from the inbox and excludes them from metrics. Marking a customer that is already marked as spam returns a `customer_already_marked_as_spam` error. Pass the customer `id` (starts with `c ## Setup 1. Create or open a Switchy Project. 2. Open Integrations and connect Plain MCP. 3. Authorise through oauth2. 4. Teammates can now @-mention Plain MCP tools in chat. --- Last verified: 2026-10-17T02:00:10.360Z Canonical URL: https://switchy.build/directory/mcps/plain-mcp