Linking Convex as a source

The Convex connector can sync your Convex database tables to PostHog.

Note: Convex streaming exports require the Convex Professional plan. See the Convex pricing page for details.

Prerequisites

You need two things from your Convex project:

• Deploy URL – must be in the format <something>.convex.cloud. Find it in the Convex Dashboard under Settings > URL & Deploy Key.
• Deploy key – found in the same location: Settings > URL & Deploy Key.

Linking Convex to PostHog

1. Go to the Data pipeline page and the sources tab in PostHog
2. Click New source and select Convex
3. Enter your Deploy URL and Deploy key
4. Click Next, select the tables you want to sync, and then press Import

Once the syncs are complete, you can start using Convex data in PostHog.

How syncing works

Convex uses its streaming export API to sync data:

• Initial sync – paginates through a full table snapshot using Convex's /api/list_snapshot endpoint.
• Incremental sync – fetches only changed documents using Convex's /api/document_deltas endpoint. All tables support incremental sync via the _ts field, which is a nanosecond mutation timestamp.
• Partitioning – data is datetime-partitioned on the _creationTime field.

Note: If the sync cursor is older than approximately 30 days (Convex's retention window), a full resync is required.

Inbound IP addresses

We use a set of IP addresses to access your instance. To ensure this connector works, add these IPs to your inbound security rules: