> ## Documentation Index > Fetch the complete documentation index at: https://docs.zebratruth.ai/llms.txt > Use this file to discover all available pages before exploring further. # Upgrade Individual to Pro > Moves an Individual subscription to Pro, effective immediately. - You are charged for Pro straight away. - The billing period **restarts on the upgrade date** and the renewal date moves with it. Upgrading on the 14th means the next charge is the 14th of the following month. - Unused Individual credits carry into the first Pro period. `GET /usage` reports the parts separately as `baseCredits` and `carriedCredits`. Downgrading from Pro to Individual is not supported. **Retries.** `Idempotency-Key` is required, and a retry after a timeout must reuse the same key. A retry with a new key can charge twice. ## OpenAPI ````yaml /openapi/zebratruth-v1.yaml post /billing/upgrade openapi: 3.1.0 info: title: ZebraTruth Compliance API version: 1.0.0 description: > AI-powered compliance checking for advertising content. Check text and images against jurisdiction laws, platform policies, and rights clearance requirements. Results include embeddable annotations mapped to content locations (text spans, video timestamps, image regions). contact: name: ZebraTruth Support email: support@zebratruth.ai url: https://developers.zebratruth.ai license: name: MIT url: https://opensource.org/licenses/MIT servers: - url: https://api.zebratruth.ai/v1 description: Production security: - bearerAuth: [] tags: - name: Video Compliance description: > **Primary endpoint.** Async compliance analysis for video ads. 3-step flow: get an upload URL, upload the video bytes, submit for analysis. Poll or receive an HMAC-signed webhook with the report. Returns timestamped findings citing stable evidence IDs (`audio_NNN`, `frame_NNN`, `ocr_NNN`, `signal_NNN`). 3-180 second videos. mp4 / webm / quicktime. Built for ad agencies and creators. - name: Authentication description: Validate API keys and check account status - name: Compliance description: >- Run compliance checks on text + image content (sync). For video, use the Video Compliance endpoints above. - name: Agents description: Discover and invoke individual compliance agents - name: Jobs description: Poll async job status and view execution traces - name: Reports description: Retrieve and replay compliance reports - name: Observability description: Request logs and webhook delivery status - name: Billing description: Subscriptions, plan changes, and credit balance - name: Documents description: Extract text from PDF and Word documents before or as part of a check - name: Check History description: List and retrieve past compliance checks for the workspace - name: Provenance description: Inspect and sign Content Credentials (C2PA) on images and video - name: Corpus description: >- Review queue for proposed changes to the governed legal corpus (dashboard session) - name: Webhooks description: Saved webhook endpoints (dashboard session) and delivery logs paths: /billing/upgrade: post: tags: - Billing summary: Upgrade Individual to Pro description: > Moves an Individual subscription to Pro, effective immediately. - You are charged for Pro straight away. - The billing period **restarts on the upgrade date** and the renewal date moves with it. Upgrading on the 14th means the next charge is the 14th of the following month. - Unused Individual credits carry into the first Pro period. `GET /usage` reports the parts separately as `baseCredits` and `carriedCredits`. Downgrading from Pro to Individual is not supported. **Retries.** `Idempotency-Key` is required, and a retry after a timeout must reuse the same key. A retry with a new key can charge twice. operationId: upgradeToPro parameters: - $ref: '#/components/parameters/IdempotencyKey' responses: '200': description: Upgrade applied content: application/json: schema: type: object properties: tier: type: string enum: - pro periodKey: type: string currentPeriodStart: type: string format: date-time currentPeriodEnd: type: string format: date-time baseCredits: type: number example: 83250 carriedCredits: type: number example: 1200 creditsCap: type: number example: 84450 creditsRemaining: type: number '400': description: >- `idempotency_key_required` — the `Idempotency-Key` header is missing. '401': $ref: '#/components/responses/Unauthorized' '409': description: > Not upgradeable. `already_pro` when the account is on Pro, `not_upgradeable` when it is not on Individual, or `subscription_not_upgradeable` when the subscription is canceled or locked. '500': description: > `carry_credit_failed` — the plan change succeeded with the payment provider but the carried credits could not be applied. Retry with the **same** `Idempotency-Key`; the grant is applied at most once. components: parameters: IdempotencyKey: name: Idempotency-Key in: header required: true schema: type: string format: uuid description: > Unique request identifier to prevent duplicate execution and double-charging. Generate a new UUID for each distinct request. Reuse the same key to safely retry. responses: Unauthorized: description: | Invalid, missing, or expired API key. Standard error envelope — read `message` for the human-readable reason. content: application/json: schema: type: object description: Standard error envelope. required: - statusCode - message properties: error: type: boolean example: true url: type: string format: uri example: https://api.zebratruth.ai/v1/whoami statusCode: type: integer example: 401 statusMessage: type: string example: Invalid API key message: type: string description: Canonical human-readable reason — pattern-match on this field. example: Invalid API key securitySchemes: bearerAuth: type: http scheme: bearer description: | API key starting with `zt_live_` (production) or `zt_test_` (sandbox). Get your key at https://developers.zebratruth.ai ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.