---
title: "Create folder"
method: POST
path: "/api/businesses/{business_id}/folders"
tags: ["library"]
---

# Create folder

`POST /api/businesses/{business_id}/folders`

## Request

- Base URL: `https://api.mymarky.ai`
- URL: `https://api.mymarky.ai/api/businesses/{business_id}/folders`
- Auth: HTTP bearer

Create a folder to organize DOCUMENTS in a business's library.

Send an `Idempotency-Key` header to make a retry safe (a resend with the same
key returns the original folder instead of creating a duplicate).

Errors:
    400 invalid_value: The business_id is not a valid UUID.
    401 authentication_required: API key or token is missing, invalid, or revoked.
    403 permission_denied: Your plan does not include API access, or this business is not in your org.
    404 resource_not_found: No business with that ID exists.
    422 IDEMPOTENCY_KEY_CONFLICT: The Idempotency-Key was reused with a different body.
    429 rate_limit_exceeded: You sent too many requests this minute.

## Path parameters

- `business_id` string, required: A UUID identifier.

## Headers

- `Idempotency-Key` string, nullable: Optional. Send a unique value (e.g. a UUID) to make this create request safe to retry. A repeat with the same key returns the original response instead of creating a duplicate. Cached for 24h, scoped to your org. Reusing a key with a different body returns 422.
- `Marky-Version` '2026-04-08' | '2026-07-17' | '2026-08-02' | '2026-08-04' | '2026-08-06'

## Request body

- FolderCreateRequest
  - `name` string, required: Folder name
  - `parent_id` string, nullable: Parent folder ID (for nesting)

## Response `201`

Successful Response

- FolderResponse
  - `id` string, required: Folder ID
  - `business_id` string, required: Business this folder belongs to
  - `name` string, required: Folder name
  - `path` string, required: Full folder path
  - `parent_id` string, nullable: Parent folder ID
  - `created_at` string, required: When the folder was created
  - `updated_at` string, nullable: Last update time

## Other responses

- `400`: Bad request — the input was malformed or otherwise invalid.
- `401`: Authentication failed — the API key is missing or invalid.
- `403`: Forbidden — the key is valid but may not access this resource.
- `404`: Not found — no resource matches the id in the path.
- `409`: Conflict — a resource like this already exists.
- `422`: Validation error — one or more fields failed validation.
- `429`: Rate limited — retry after the window resets (see Retry-After).
- `500`: Server error — something failed on our side; retry or quote X-Request-Id.

---

[API](https://skmtc.dev/mymarky/apis/marky-public-api.md) · [All operations](https://skmtc.dev/mymarky/apis/marky-public-api/llms.txt) · [OpenAPI document](https://skmtc.dev/mymarky/apis/marky-public-api/revisions/25aeacae455c?raw)