> ## Documentation Index > Fetch the complete documentation index at: https://pigeonpost-developer.27communication.com/llms.txt > Use this file to discover all available pages before exploring further. # Create a folder > Creates the folder in the user's mailbox (inside `parent_id` when given). `email.folder.create` follows. ## OpenAPI ````yaml /api-reference/openapi.yaml post /{account_id}/folders openapi: 3.1.0 info: title: PigeonPost API version: 1.0.0 description: > Connect your users' mailboxes (Gmail with an app password, and any IMAP/SMTP provider), read, send and manage their email, and receive webhooks when something changes. The API follows Unipile's v2 conventions (ids, lists, events); its own version is v1. **Authentication:** every request needs your access token in the `X-API-KEY` header. Create tokens in your dashboard under **API keys**, or with `POST /api/v1/api-keys`. **Base URL:** `https://{your DSN}/api/v1`. Your DSN is shown in your dashboard. **Emails follow Unipile's v2 email API:** the account goes in the path (`/api/v1/{account_id}/emails`, `/emails/send`, `/folders`, `/drafts`), with separate read, unread, modify and thread actions. IMAP only. **Ids** carry their type: `acc_…` (account), `email_…`, `att_…` (attachment), `fld_…` (folder), `drf_…` (draft), `we_…` (webhook endpoint), `evt_…` (event), `pk_…` (API key). **Lists** are `{ "object": "", "data": [...], "has_more": true|false }`. Accounts, webhook endpoints, conversations and API keys page with `offset` and `limit`. Emails, drafts and contacts page with a `cursor`: pass the `cursor` of a response back to get the next page. **Errors** always have the same JSON shape: `status`, `type`, `title`, `detail`. servers: - url: https://{dsn}/api/v1 description: Your workspace's DSN, from your dashboard variables: dsn: default: mail-api.example.com description: Your DSN, for example mail-api.example.com security: - apiKey: [] tags: - name: Auth description: Connect a mailbox from your app (IMAP/SMTP). - name: Accounts description: The mailboxes connected to your workspace. - name: Emails description: Read, search, send, change and delete emails. - name: Attachments description: Download the files attached to an email. - name: Drafts description: Drafts saved in the user's mailbox. - name: Folders description: Folders (Gmail labels appear as folders over IMAP). - name: Contacts description: The people an account has emailed with. - name: Webhooks description: Get notified when something happens in a mailbox. - name: API keys description: Access tokens for this API. paths: /{account_id}/folders: parameters: - $ref: '#/components/parameters/account_id' post: tags: - Folders summary: Create a folder description: >- Creates the folder in the user's mailbox (inside `parent_id` when given). `email.folder.create` follows. operationId: createFolder requestBody: required: true content: application/json: schema: type: object required: - name properties: name: type: string parent_id: type: string description: The `fld_…` id of the folder to create it in. example: name: Customers responses: '201': description: The new folder. content: application/json: schema: $ref: '#/components/schemas/Folder' '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/InvalidCredentials' '404': $ref: '#/components/responses/NotFound' '422': $ref: '#/components/responses/ProviderRejected' '502': $ref: '#/components/responses/ProviderError' components: parameters: account_id: name: account_id in: path required: true description: The account's `acc_…` id. schema: type: string example: acc_ba1fa6938d8548298e8ce62e4b4b4e99 schemas: Folder: type: object properties: object: type: string const: Folder id: type: string description: '`fld_…`' account_id: type: string name: type: string role: $ref: '#/components/schemas/Role' parent_id: type: - string - 'null' total_count: type: integer Role: type: string enum: - INBOX - SENT - DRAFTS - TRASH - SPAM - ARCHIVE - ALL - IMPORTANT - STARRED - UNKNOWN Error: type: object properties: status: type: integer type: type: string enum: - errors/invalid_parameters - errors/unauthorized - errors/invalid_credentials - errors/not_found - errors/already_exists - errors/provider_rejected - errors/provider_error - errors/unexpected_error title: type: string detail: type: string responses: BadRequest: description: A parameter is missing or wrong. `detail` says which. content: application/json: schema: $ref: '#/components/schemas/Error' example: status: 400 type: errors/invalid_parameters title: Invalid parameters detail: limit must be between 1 and 250 InvalidCredentials: description: >- `errors/invalid_credentials`: the mail provider rejected the account's password or token; reconnect it. (`errors/unauthorized`: a bad access token.) content: application/json: schema: $ref: '#/components/schemas/Error' example: status: 401 type: errors/invalid_credentials title: Invalid credentials detail: 'the mail provider rejected the credentials: invalid_grant' NotFound: description: Nothing with this id (a malformed or wrong-type id is also not found). content: application/json: schema: $ref: '#/components/schemas/Error' example: status: 404 type: errors/not_found title: Not found detail: email email_94a0d77db739407e932c3b97fef44aac not found ProviderRejected: description: The mail provider refused the request. Retrying won't help. content: application/json: schema: $ref: '#/components/schemas/Error' example: status: 422 type: errors/provider_rejected title: Rejected by the provider detail: Message too large ProviderError: description: The mail provider failed or didn't answer. Try again later. content: application/json: schema: $ref: '#/components/schemas/Error' example: status: 502 type: errors/provider_error title: Mail provider error detail: timed out talking to imap.example.com securitySchemes: apiKey: type: apiKey in: header name: X-API-KEY description: Your access token, from your dashboard under **API keys**. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.