# How to Build an OnlyFans CRM with the API: Data Model, Webhooks and Sync

> Learn how to build an OnlyFans CRM by configuring secure authentication, a relational data model, historical data backfills, and near real-time webhook synchronization.

**TL;DR**

- A complete OnlyFans CRM data model separates multi-tenant agency accounts, individual creator rosters, fan profiles, conversations, and financial ledgers.
- Authentication relies on embedded client sessions, allowing creators to log in with email, password, and 2FA inside a secure modal.
- The initial data state is populated by paginating through list endpoints for fans, chats, and earning histories.
- Ongoing synchronization operates on webhooks (Basic plan and up) like `messages.received` and `transactions.new` to eliminate rate-limit-heavy polling.

Building an OnlyFans CRM requires a relational database to store accounts, fans, chats, and transactions, combined with a historical data backfill and event-driven webhooks to keep the system in sync. Developers can construct this backend architecture by authenticating creators via secure modals, pulling historical records via REST list endpoints, and ingesting live state changes through near real-time webhooks (Basic plan and up).

**Key Takeaways**

- A complete OnlyFans CRM data model separates multi-tenant agency accounts, individual creator rosters, fan profiles, conversations, and financial ledgers.
- Authentication relies on embedded client sessions, allowing creators to log in with email, password, and 2FA inside a secure modal.
- The initial data state is populated by paginating through list endpoints for fans, chats, and earning histories.
- Ongoing synchronization operates on webhooks (Basic plan and up) like `messages.received` and `transactions.new` to eliminate rate-limit-heavy polling.

## How do I build an OnlyFans CRM using an API?

To build a custom OnlyFans CRM using an API, you must configure embedded authentication, design a relational data model for fans and transactions, execute a historical data backfill via REST list endpoints, and subscribe to near real-time webhooks (Basic plan and up) for ongoing synchronization.

1. **Authentication and Account Connection**: Use the `@onlyfansapi/auth` package to embed a secure login modal.
2. **Relational Data Model**: Map tables for creator accounts, subscriber spending profiles, chat threads, and transaction ledgers.
3. **Historical Data Backfill**: Paginate endpoints like `GET https://app.fansapi.com/api/{account}/fans/all` to hydrate internal databases with historical profiles and chat logs.
4. **Near Real-Time Webhook Synchronization**: Ingest events like `messages.received` and `transactions.new` to update database states without continuous polling.

## Designing the Relational Data Model

A CRM data model isolates multi-tenant agency accounts from individual creator rosters, fan relationship profiles, chronological conversations, and financial ledgers. Engineering teams building proprietary software, as explored in our [OnlyFans CRM and agency software](/blog/onlyfans-crm-agency-software) guide, require direct programmatic control over these entities.

**Core Data Entities**

- **Creator Accounts**: Stores creator metadata and session connection status. Key the record on the creator's `onlyfans_id`: a reconnected creator gets a new `acct_` ID.
- **Fans**: Centralizes subscriber metadata, lifetime spend breakdowns, custom notes, and CRM tags.
- **Chats and Messages**: Stores conversation threads, message direction, PPV states, and attached CDN media IDs.
- **Transactions**: Maintains an immutable record of monetary events for commission payouts and attribution.

| Field Name | Type | Description |
| --- | --- | --- |
| `id` | `VARCHAR(64)` | Subscriber user ID (`fan.id`) |
| `account_id` | `VARCHAR(64)` | Scoped creator account ID starting with `acct_` |
| `total_spent` | `DECIMAL(12,2)` | Lifetime spend (`totalSumm` / `spending.total`) |
| `messages_spent` | `DECIMAL(12,2)` | Paid message spend (`messagesSumm` / `spending.messages`) |
| `subscribes_spent` | `DECIMAL(12,2)` | Subscription spend (`subscribesSumm` / `spending.subscribes`) |

## Embedded Authentication and Account Connection

Agencies and developers build secure onboarding flows by integrating the official `@onlyfansapi/auth` NPM package. The creator logs in with email, password, and 2FA inside our secure modal.

The backend generates a [client session token](https://docs.fansapi.com/api-reference/client-sessions/create-client-session) via `POST https://app.fansapi.com/api/client-sessions`. The frontend then launches the modal using `startOnlyFansAuthentication`. Upon successful 2FA completion, the modal returns an `accountId` formatted as `acct_XXXX`, linking the creator to the CRM tenant.

## Initial Historical Backfill via List Endpoints

Once an account connects, the CRM executes an initial historical sync to hydrate the database before relying on webhooks. As detailed on our [OnlyFans CRM API](https://fansapi.com/onlyfans-crm-api) page, this process iterates through subscribers, conversations, message logs, and past transactions.

### Paginating Subscribers and Spending Profiles

[Fetch all active and expired fans](https://docs.fansapi.com/api-reference/fans/list-all-fans) using offset pagination to capture complete financial breakdowns.

```typescript
export async function backfillFans(accountId: string, apiKey: string) {
  let offset = 0;
  const limit = 20;
  let hasMore = true;

  while (hasMore) {
    const url = `https://app.fansapi.com/api/${accountId}/fans/all?limit=${limit}&offset=${offset}`;
    const res = await fetch(url, {
      headers: { 'Authorization': `Bearer ${apiKey}` }
    });

    const result = await res.json();
    const fans = result.data?.list ?? [];

    // Upsert logic for each fan profile and spending data goes here

    hasMore = result.data?.hasMore === true;
    offset += limit;
  }
}
```

## Near Real-Time Sync via Webhooks

Polling APIs continuously exhausts rate limits and introduces sync lag. Webhooks deliver [message and transaction events](https://docs.fansapi.com/webhooks/available-events) in near real-time (`transactions.new` can lag up to 3 minutes). Webhooks and dedicated mobile proxy infrastructure are available on the Basic plan ($69/month) and up. OnlyFansAPI provides access to 320+ endpoints, has handled 300M+ API requests and webhooks, and is used by 1,100+ companies.

### Core Webhook Event Catalog

- `accounts.connected`: Fires when a creator completes the auth flow.
- `messages.received`: Inbound message from a fan.
- `messages.ppv.unlocked`: A fan buys a PPV message you sent.
- `subscriptions.new`: New subscriber joins.
- `subscriptions.renewed`: Subscriber rebill occurs.
- `subscriptions.expired`: Subscription lapses.
- `transactions.new`: Any monetary charge like tips, posts, or subscriptions.

Webhook routers must ingest these events to update the CRM database.

```typescript
export async function handleOnlyFansWebhook(req: Request, res: Response) {
  // Verify the Signature header (HMAC SHA256 of the raw body) and skip repeated X-OFAPI-Idempotency-Key values first
  const { event, account_id, payload } = req.body;
  res.status(200).json({ received: true });

  if (event === 'messages.received') {
    // Insert message into CRM database and update unread counts
  } else if (event === 'transactions.new') {
    // Log financial event into the ledger
  }
}
```

## Executing CRM Actions and Outbound Sync

To function as an operational CRM, the system executes outbound actions back to the platform. OnlyFansAPI routes these requests through one dedicated mobile IP per connected OnlyFans account (US or UK, Basic plan and up) with no rotation. OnlyFansAPI has recorded zero bans in 5+ years.

### Sending Outbound Messages and PPVs

Outbound chat messages support plain text, uploaded CDN media files, and PPV pricing. Paid messages require a price between 3 and 200 and need `mediaFiles` unless `lockedText` is true. Mass messages have no dry-run capability.

```typescript
export async function sendCrmReply(
  accountId: string,
  chatId: string,
  text: string,
  price: number = 0,
  apiKey: string,
  mediaFiles: string[] = []
) {
  const payload: any = { text };
  if (price > 0) {
    payload.price = price;
    payload.mediaFiles = mediaFiles; // required for paid messages unless lockedText is true
  }

  const msgRes = await fetch(`https://app.fansapi.com/api/${accountId}/chats/${chatId}/messages`, {
    method: 'POST',
    headers: {
      'Authorization': `Bearer ${apiKey}`,
      'Content-Type': 'application/json'
    },
    body: JSON.stringify(payload)
  });

  return await msgRes.json();
}
```

### Updating Fan Notes and Segmentation

A custom CRM allows operators to maintain persistent notes and segment lists that sync directly. Developers can create or edit a fan's notes on the creator's account by calling `PUT https://app.fansapi.com/api/{account}/fans/{fan_id}/notes` (body field `notes`), and add fans to an OnlyFans list with `POST https://app.fansapi.com/api/{account}/user-lists/{userListId}/users`.

Building a custom internal tool allows agencies to control their data layer completely. By combining embedded authentication, list endpoint backfills, and near real-time webhook ingestion, development teams can build scalable applications supported by 99.98% uptime.