> ## 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 <API key>`; 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.

# Changelog

> New features, changes and fixes in the OnlyX API and MCP server.

Changes to the OnlyX API (`https://api.onlyx.ai/v1`) and the OnlyX MCP server (`https://mcp.onlyx.ai/mcp`). Subscribe with the RSS button to hear about new releases.

We keep `/v1` backward compatible: we add endpoints, fields and error codes, but we do not remove or rename them within `v1`. Build your integration to ignore fields it does not know.

<Update label="2026-09-26" description="v1.0: the OnlyX API and MCP server launch" tags={["Launch", "API", "MCP"]}>
  ## The OnlyX API and MCP server are live

  **API keys and OAuth**

  * Workspace-owned API keys (`onx_sk_...`) created in **Settings → API & MCP** by owners and admins, with 15 scopes, **Full access** and **Read only** presets, optional creator restrictions and expiry, and immediate revocation. Keys are stored hashed and shown once.
  * OAuth 2.1 with PKCE, automatic client registration and a consent screen, so AI assistants connect without copying a key. Every connection is listed under **Connected apps**.

  **Creators and connecting**

  * Add creators with `POST /v1/creators`, send them a one-time connect link, and follow the sign-in with `GET /v1/creators/{creatorId}/connection`. Creators sign in themselves with the OnlyX Login app on iPhone, Mac or Windows, including OnlyFans' face verification.
  * Turn the AI on or off per creator.

  **Inbox**

  * Conversations with filters and counts, message history, hand-offs.
  * Send text, free vault media and paid messages with a required `Idempotency-Key`, and follow delivery (`queued`, `sent`, `failed`, `unconfirmed`, `not_sent`).
  * Take over, release, and turn the AI on or off per chat; mark read and unread; resolve hand-offs.

  **Fans and vault**

  * Fans with segments (whales, lapsing, win-back and more), purchase history, notes, custom names and fan lists.
  * Vault media lists and thumbnails.

  **Stats and money**

  * Today, revenue (by type, day and seller), audience, the cached overview report, and each creator's transaction ledger.

  **The AI chatter**

  * AI persona: read and update every field, with readiness.
  * AI content: folders, ladders, levels with floor prices, preview and paid media, ordering.
  * AI settings: follow-ups, review mode, and the OnlyFans welcome message with dry runs.

  **Tracking links**

  * Clicks, subscribers, earnings, cost and ROI per link; record cost and source; create tracking and trial links.

  **MCP server**

  * 60 tools and 6 prompts at `https://mcp.onlyx.ai/mcp`, with one-click setup for Claude, Cursor and VS Code, and guides for ChatGPT, Claude Code, Windsurf, Gemini CLI and Codex.

  **Platform**

  * Consistent error envelope and codes, rate limits with `X-RateLimit-*` headers, cursor pagination, idempotent writes, and a public OpenAPI schema at `https://api.onlyx.ai/v1/openapi.json`.
</Update>