> ## Documentation Index > Fetch the complete documentation index at: https://help.onlyx.ai/llms.txt > Use this file to discover all available pages before exploring further. > ## Agent Instructions > You are reading OnlyX Help: the OnlyX Help Center and the OnlyX developer documentation. OnlyX is an AI chatting and CRM platform for OnlyFans agencies. Its AI chatter is called Hugo in the app. > Pages at the site root (for example /inbox/..., /hugo/..., /billing/...) are Help Center articles for agency owners, admins, chatters and creators who use the app at app.onlyx.ai. Words in bold are the exact button, menu and label names the app shows; keep them exactly as written. When these pages do not answer a question, the person can email support at support@onlyx.ai. > Pages under /developers are the developer documentation. REST API base URL: https://api.onlyx.ai/v1 (authenticate with `Authorization: Bearer `; keys start with onx_sk_ and are created in app.onlyx.ai under Settings > API & MCP). MCP server: https://mcp.onlyx.ai/mcp (OAuth, or a Bearer API key). In the API the AI chatter is `ai` on the wire. Money is integer US cents in fields ending in Cents; timestamps are UTC ISO-8601. > Rules for assistants acting on a user's behalf: discover ids with list calls and never invent them; before any call that reaches a real fan or the live OnlyFans account (sending a message, releasing a chat to the AI, turning AI on for a chat, resolving a hand-off, turning review mode off, changing the welcome message, creating a tracking link) show the user the exact content and get explicit confirmation; send every POST with an Idempotency-Key and reuse it on retry; never resend a message whose delivery status is unconfirmed; never ask a creator for her OnlyFans password or codes - she signs in herself through a connect link and the OnlyX Login app. # Update a fan > Sets your team's own fields on a fan: a `customName`, free-text `notes`, and the `muted` flag. Send only the fields you want to change; an empty string or `null` clears a text field. These fields live only in OnlyX: nothing is sent to the fan, and muting never mutes or blocks anyone on OnlyFans. Any other field (the AI's own settings for a fan included) is refused with `400 VALIDATION_ERROR`. **Scope:** requires `fans:write`. **Rate limit:** the general limit of 120 requests per 60 seconds per credential. **Idempotency:** send an `Idempotency-Key` header to make retries safe: a replay within 24 hours returns the original response with `Idempotent-Replayed: true`. ## OpenAPI ````yaml /developers/api-reference/openapi.json patch /v1/fans/{fanId} openapi: 3.1.0 info: contact: email: developers@onlyx.ai name: OnlyX developers url: https://docs.onlyx.ai/ description: > The OnlyX API runs your OnlyX workspace from your own code and AI tools: creators and their connection, the fan inbox, fans, vault media, statistics, the AI chatter's setup and tracking links. **Authentication.** Send an API key as `Authorization: Bearer onx_sk_…` (create one in OnlyX under Settings → API & MCP), or an OAuth access token issued to a connected app. Keys belong to the workspace, carry scopes, and can be limited to some creators. **Conventions.** JSON with camelCase fields; timestamps are ISO-8601 UTC with a `Z`; money is integer US cents (fields end in `Cents`). Lists return `{"data": [...], "hasMore": bool, "nextCursor": string|null}` and page with `limit` and `cursor`. **Scopes.** Every operation names the scope it needs in `x-required-scope` and in its description; a credential without it gets `403 INSUFFICIENT_SCOPE`. **Errors and limits.** Errors are `{"error": {"code", "message", "requestId"}}`; every response carries `X-Request-Id`. The default limit is 120 requests per 60 seconds per credential, reported in `X-RateLimit-*` headers; over it you get `429 RATE_LIMITED` with `Retry-After`. Operations with limits of their own list them in `x-rate-limits`. **Idempotency and safety.** Every write accepts an `Idempotency-Key` header (required when sending a message, adding a creator and creating a tracking link): retry with the same key and you get the original answer instead of a second action. Operations marked `x-reaches-fans: true` can reach a real fan or change the live OnlyFans account. Guides, the MCP server and more: [docs.onlyx.ai](https://docs.onlyx.ai). summary: >- Run your OnlyX workspace (creators, inbox, fans, stats and the AI chatter) from code and AI tools. title: OnlyX API version: 1.0.0 servers: - description: Production url: https://api.onlyx.ai security: - bearerAuth: [] tags: - description: 'Who you are: the workspace and credential behind a key.' name: Workspace - description: >- The creators your workspace manages: list, read, add, rename, and the AI switch. name: Creators - description: >- Connecting a creator's OnlyFans account: connect links she opens on her own device, and the connection status to poll. name: Connect - description: >- The fan inbox: list and count conversations, read state, take over, release, and the per-chat AI switch. name: Conversations - description: Read message history and send text, free media and paid messages to fans. name: Messages - description: Conversations the AI chatter handed to your team, and resolving them. name: Hand-offs - description: >- Fans, their purchases, fan lists, and your team's notes, custom names and mute flag. name: Fans - description: >- Each creator's OnlyFans vault: media ids for messages and levels, and thumbnails. name: Media - description: >- Today, revenue, audience, the cached overview report, and each creator's transaction ledger. name: Stats - description: The brief the AI chatter follows to chat as each creator. name: AI persona - description: 'The AI content ladder: folders, ladders, priced levels and their media.' name: AI content - description: >- Follow-ups, review mode, the master AI switch, and OnlyFans' welcome message. name: AI settings - description: >- OnlyFans tracking and trial links, your cost fields, and creating new links. name: Tracking links externalDocs: description: OnlyX developer documentation url: https://docs.onlyx.ai paths: /v1/fans/{fanId}: patch: tags: - Fans summary: Update a fan description: >- Sets your team's own fields on a fan: a `customName`, free-text `notes`, and the `muted` flag. Send only the fields you want to change; an empty string or `null` clears a text field. These fields live only in OnlyX: nothing is sent to the fan, and muting never mutes or blocks anyone on OnlyFans. Any other field (the AI's own settings for a fan included) is refused with `400 VALIDATION_ERROR`. **Scope:** requires `fans:write`. **Rate limit:** the general limit of 120 requests per 60 seconds per credential. **Idempotency:** send an `Idempotency-Key` header to make retries safe: a replay within 24 hours returns the original response with `Idempotent-Replayed: true`. operationId: updateFan parameters: - description: The fan id (`fan_…`), from `GET /v1/fans`. in: path name: fanId required: true schema: description: The fan id (`fan_…`), from `GET /v1/fans`. maxLength: 40 title: Fanid type: string - $ref: '#/components/parameters/IdempotencyKey' requestBody: content: application/json: schema: $ref: '#/components/schemas/UpdateFanRequest' required: true responses: '200': content: application/json: example: avatarUrl: null conversationId: cnv_3d9e7b1a5c2f4e8d6a0b createdAt: '2026-03-02T18:21:07.000Z' creatorId: cre_8f2c1a9b0d7e4c3f2a1b customName: Mike (birthday 14 May) displayName: Mike id: fan_6b2e8d4a1c9f3e7b5d0a lastActiveAt: '2026-09-25T21:40:12.000Z' lastPurchaseAt: '2026-09-24T22:03:55.000Z' lists: - id: lst_9c1d2e3f4a5b6c7d8e9f name: VIP muted: false notes: Likes lingerie sets. Tips on Fridays. paidMessagesCents: 36500 renewOn: true salesOptOut: false subscribed: true subscribedAt: '2026-03-02T18:21:07.000Z' subscriptionExpiresAt: '2026-10-02T18:21:07.000Z' subscriptionPriceCents: 999 tipsCents: 12000 totalSpentCents: 48500 username: null schema: $ref: '#/components/schemas/Fan' description: The updated fan. headers: Idempotent-Replayed: $ref: '#/components/headers/Idempotent-Replayed' X-RateLimit-Limit: $ref: '#/components/headers/X-RateLimit-Limit' X-RateLimit-Remaining: $ref: '#/components/headers/X-RateLimit-Remaining' X-RateLimit-Reset: $ref: '#/components/headers/X-RateLimit-Reset' X-Request-Id: $ref: '#/components/headers/X-Request-Id' '400': content: application/json: examples: VALIDATION_ERROR: summary: VALIDATION_ERROR value: error: code: VALIDATION_ERROR message: 'displayName: Extra inputs are not permitted' requestId: req-3f9a1c2b7d4e5f60a1b2c3d4 schema: $ref: '#/components/schemas/Error' description: >- The request is not valid and was not carried out. Fix it before retrying. `VALIDATION_ERROR`: the request is not valid; `message` names the field and the problem. headers: X-Request-Id: $ref: '#/components/headers/X-Request-Id' '401': $ref: '#/components/responses/Unauthorized' '403': content: application/json: examples: INSUFFICIENT_SCOPE: summary: INSUFFICIENT_SCOPE value: error: code: INSUFFICIENT_SCOPE message: This key does not have the `fans:write` scope. requestId: req-3f9a1c2b7d4e5f60a1b2c3d4 WORKSPACE_SUSPENDED: summary: WORKSPACE_SUSPENDED value: error: code: WORKSPACE_SUSPENDED message: This workspace is suspended. requestId: req-3f9a1c2b7d4e5f60a1b2c3d4 schema: $ref: '#/components/schemas/Error' description: >- The credential may not do this. `INSUFFICIENT_SCOPE`: the credential lacks the `fans:write` scope (the `WWW-Authenticate` header names it; an OAuth token's message says "token" instead of "key"). `WORKSPACE_SUSPENDED`: the workspace is suspended. headers: WWW-Authenticate: $ref: '#/components/headers/WWW-Authenticate' X-Request-Id: $ref: '#/components/headers/X-Request-Id' '404': content: application/json: examples: FAN_NOT_FOUND: summary: FAN_NOT_FOUND value: error: code: FAN_NOT_FOUND message: Fan not found. requestId: req-3f9a1c2b7d4e5f60a1b2c3d4 schema: $ref: '#/components/schemas/Error' description: >- Not found. An id that does not exist, belongs to another workspace, or is outside this credential's creators all get the same answer. `FAN_NOT_FOUND`: no fan with this `fanId` is visible to this credential. headers: X-Request-Id: $ref: '#/components/headers/X-Request-Id' '409': content: application/json: examples: IDEMPOTENCY_IN_PROGRESS: summary: IDEMPOTENCY_IN_PROGRESS value: error: code: IDEMPOTENCY_IN_PROGRESS message: >- A request with this Idempotency-Key is still being processed. Retry in a few seconds. requestId: req-3f9a1c2b7d4e5f60a1b2c3d4 IDEMPOTENCY_KEY_REUSED: summary: IDEMPOTENCY_KEY_REUSED value: error: code: IDEMPOTENCY_KEY_REUSED message: >- This Idempotency-Key was already used for a different request. Use a new key for a new request. requestId: req-3f9a1c2b7d4e5f60a1b2c3d4 schema: $ref: '#/components/schemas/Error' description: >- The request conflicts with the current state. `IDEMPOTENCY_KEY_REUSED`: this `Idempotency-Key` was already used for a different request (or by another credential). Use a new key for a new request. `IDEMPOTENCY_IN_PROGRESS`: a request with this `Idempotency-Key` is still running. Retry in a few seconds with the same key. headers: X-Request-Id: $ref: '#/components/headers/X-Request-Id' '429': $ref: '#/components/responses/RateLimited' '500': $ref: '#/components/responses/InternalError' components: parameters: IdempotencyKey: description: >- Optional. A unique value (8 to 64 letters, digits, `-` or `_`; a UUID is ideal) that makes a retry safe: the same key with the same request within 24 hours returns the stored response, with `Idempotent-Replayed: true`, instead of doing the work twice. The same key with a different request is `409 IDEMPOTENCY_KEY_REUSED`; while the first request still runs it is `409 IDEMPOTENCY_IN_PROGRESS`. A malformed key is `400 VALIDATION_ERROR`. example: 3b1f7c2e-9d4a-4e8b-a6c1-5f0d2e7b9a14 in: header name: Idempotency-Key required: false schema: maxLength: 64 minLength: 8 pattern: ^[A-Za-z0-9_-]{8,64}$ type: string schemas: UpdateFanRequest: additionalProperties: false description: >- Only your team's own fields. Anything else — including any AI setting — is refused. examples: - customName: Mike (birthday 14 May) muted: false notes: Tips on Fridays. properties: customName: anyOf: - maxLength: 160 type: string - type: 'null' description: >- A name your team recognizes, shown instead of the OnlyFans name in OnlyX. `""` or `null` clears it. muted: anyOf: - type: boolean - type: 'null' description: Your team's mute flag. It never mutes or blocks the fan on OnlyFans. notes: anyOf: - maxLength: 4000 type: string - type: 'null' description: >- Free-text notes for your team (up to 4,000 characters). `""` or `null` clears them. title: UpdateFanRequest type: object Fan: examples: - avatarUrl: null conversationId: cnv_3d9e7b1a5c2f4e8d6a0b createdAt: '2026-03-02T18:21:07.000Z' creatorId: cre_8f2c1a9b0d7e4c3f2a1b customName: Mike (birthday 14 May) displayName: Mike id: fan_6b2e8d4a1c9f3e7b5d0a lastActiveAt: '2026-09-25T21:40:12.000Z' lastPurchaseAt: '2026-09-24T22:03:55.000Z' lists: - id: lst_9c1d2e3f4a5b6c7d8e9f name: VIP muted: false notes: Likes lingerie sets. Tips on Fridays. paidMessagesCents: 36500 renewOn: true salesOptOut: false subscribed: true subscribedAt: '2026-03-02T18:21:07.000Z' subscriptionExpiresAt: '2026-10-02T18:21:07.000Z' subscriptionPriceCents: 999 tipsCents: 12000 totalSpentCents: 48500 username: null properties: avatarUrl: anyOf: - type: string - type: 'null' description: The fan's OnlyFans avatar, when known. conversationId: anyOf: - type: string - type: 'null' description: The conversation with this fan, or `null` if there is none yet. createdAt: anyOf: - type: string - type: 'null' description: When OnlyX first saw this fan. creatorId: description: The creator this fan subscribes (or subscribed) to. type: string customName: anyOf: - type: string - type: 'null' description: The name your team gave this fan in OnlyX. Only your team sees it. displayName: description: The fan's OnlyFans display name. type: string id: description: The fan id (`fan_…`). A fan belongs to one creator. type: string lastActiveAt: anyOf: - type: string - type: 'null' description: The fan's last activity OnlyX saw (a message or a purchase). lastPurchaseAt: anyOf: - type: string - type: 'null' description: The fan's last purchase. lists: description: The creator's fan lists this fan is on. items: $ref: '#/components/schemas/FanListRef' type: array muted: description: >- Your team's mute flag in OnlyX. It never mutes or blocks the fan on OnlyFans. type: boolean notes: anyOf: - type: string - type: 'null' description: Your team's notes on this fan. paidMessagesCents: description: Paid-message purchases, in cents. type: integer renewOn: anyOf: - type: boolean - type: 'null' description: Whether auto-renew is on. `null` when OnlyFans has not said. salesOptOut: description: >- `true` when the fan asked not to be sold to. Paid messages to this fan are refused with `409 SALES_OPTED_OUT`, and the AI does not sell to them. type: boolean subscribed: description: '`true` while the subscription is active.' type: boolean subscribedAt: anyOf: - type: string - type: 'null' description: When the current (or last) subscription started. subscriptionExpiresAt: anyOf: - type: string - type: 'null' description: When the current subscription ends or ended. subscriptionPriceCents: anyOf: - type: integer - type: 'null' description: What the fan pays per period, in cents. `0` on a free page. tipsCents: description: Tips, in cents. type: integer totalSpentCents: description: Everything the fan has spent on this creator, in cents. type: integer username: anyOf: - type: string - type: 'null' description: The fan's OnlyFans username, when known. required: - id - creatorId - conversationId - displayName - customName - avatarUrl - subscribed - subscribedAt - subscriptionExpiresAt - subscriptionPriceCents - renewOn - totalSpentCents - tipsCents - paidMessagesCents - lastActiveAt - lastPurchaseAt - muted - notes - salesOptOut - lists - createdAt title: Fan type: object Error: properties: error: properties: code: description: Stable, machine-readable error code. type: string message: description: What went wrong, in a sentence for a person. type: string requestId: description: >- The id of this request (also in the `X-Request-Id` header). Quote it to support. type: string required: - code - message - requestId type: object required: - error type: object FanListRef: properties: id: description: The fan list id (`lst_…`). type: string name: description: The list name. type: string required: - id - name title: FanListRef type: object headers: Idempotent-Replayed: description: >- `true` when this response is the stored answer to an earlier request with the same `Idempotency-Key`: nothing was done again. Absent on a first answer. schema: enum: - 'true' type: string X-RateLimit-Limit: description: >- Requests allowed in the current window of the tightest limit this request counted against. example: 120 schema: type: integer X-RateLimit-Remaining: description: Requests left in that window. example: 117 schema: type: integer X-RateLimit-Reset: description: When that window resets, as Unix epoch seconds. example: 1790431380 schema: type: integer X-Request-Id: description: >- The id of this request. Your own `X-Request-Id` (8 to 64 letters, digits or `-`) is echoed back; otherwise OnlyX creates one. Also in every error body as `requestId`: quote it to support. example: req-3f9a1c2b7d4e5f60a1b2c3d4 schema: type: string WWW-Authenticate: description: >- The authentication challenge (RFC 6750), for example `Bearer error="insufficient_scope", scope="messages:send"`. schema: type: string Retry-After: description: Seconds to wait before trying again. example: 12 schema: type: integer responses: Unauthorized: content: application/json: examples: INVALID_API_KEY: summary: INVALID_API_KEY value: error: code: INVALID_API_KEY message: The API key is invalid, expired or revoked. requestId: req-3f9a1c2b7d4e5f60a1b2c3d4 INVALID_TOKEN: summary: INVALID_TOKEN value: error: code: INVALID_TOKEN message: The access token is invalid, expired or revoked. requestId: req-3f9a1c2b7d4e5f60a1b2c3d4 UNAUTHORIZED: summary: UNAUTHORIZED value: error: code: UNAUTHORIZED message: >- Authentication required. Send your API key as `Authorization: Bearer onx_sk_…`. requestId: req-3f9a1c2b7d4e5f60a1b2c3d4 schema: $ref: '#/components/schemas/Error' description: >- No credential was sent (`UNAUTHORIZED`), or it is invalid, expired or revoked (`INVALID_API_KEY` for API keys, `INVALID_TOKEN` for OAuth access tokens: refresh the token or reconnect the app). Too many failed attempts from one address with credentials OnlyX never issued are answered `429 RATE_LIMITED` instead. headers: WWW-Authenticate: $ref: '#/components/headers/WWW-Authenticate' X-Request-Id: $ref: '#/components/headers/X-Request-Id' RateLimited: content: application/json: examples: RATE_LIMITED: summary: RATE_LIMITED value: error: code: RATE_LIMITED message: Too many requests. Try again in 12 seconds. requestId: req-3f9a1c2b7d4e5f60a1b2c3d4 schema: $ref: '#/components/schemas/Error' description: >- Over a rate limit (`RATE_LIMITED`). Wait `Retry-After` seconds, then retry — with the same `Idempotency-Key` for a write. headers: Retry-After: $ref: '#/components/headers/Retry-After' X-RateLimit-Limit: $ref: '#/components/headers/X-RateLimit-Limit' X-RateLimit-Remaining: $ref: '#/components/headers/X-RateLimit-Remaining' X-RateLimit-Reset: $ref: '#/components/headers/X-RateLimit-Reset' X-Request-Id: $ref: '#/components/headers/X-Request-Id' InternalError: content: application/json: examples: INTERNAL_ERROR: summary: INTERNAL_ERROR value: error: code: INTERNAL_ERROR message: Something went wrong on our side. requestId: req-3f9a1c2b7d4e5f60a1b2c3d4 schema: $ref: '#/components/schemas/Error' description: >- Something went wrong on OnlyX's side (`INTERNAL_ERROR`). Retry with backoff (reuse the `Idempotency-Key` for a write); quote `requestId` to support if it persists. headers: X-Request-Id: $ref: '#/components/headers/X-Request-Id' securitySchemes: bearerAuth: bearerFormat: onx_sk_… API key or onx_at_… access token description: >- An API key (`onx_sk_…`) created in OnlyX under Settings → API & MCP, or an OAuth access token (`onx_at_…`) issued to a connected app. Send it as `Authorization: Bearer `. API keys may also be sent as `X-API-Key: `. scheme: bearer type: http ````