Linking Anvil as a source
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Contents
This source is currently in alpha. The interface and available tables may change.
The Anvil connector syncs organizations, casts, welds, and more into the PostHog data warehouse, so you can analyze them alongside your product data.
Prerequisites
Credentials that can read the data you want to sync. PostHog only reads data, so read access is enough.
Adding a data source
- In PostHog, go to the Sources tab of the data pipeline section.
- Click + New source and click Link next to this source.
- Enter your credentials (see Configuration below) and click Next.
- Select the tables you want to sync, choose a sync method and frequency, then click Import.
Once the syncs are complete, you can start querying this data in PostHog.
Sync metadata about your Anvil documents: organizations, PDF templates (casts), workflows (welds), workflow submissions, and e-signature packets with their signer status.
Create an API key in your Anvil organization settings, under API settings. Development keys are rate limited to 4 requests per second, so large accounts sync faster with a production key.
Only metadata is synced. Filled PDFs, signed documents, and submission form data never leave Anvil.
You'll be asked for:
- API key
Sync modes
Each table can be synced in one of several modes, depending on what the source supports:
- Webhook (when available) – the source pushes changes to PostHog in real time. Fastest freshness, lowest ongoing cost, and the only mode that reliably captures updates and deletes.
- Incremental – only new or updated rows are synced on each run, using a cursor field (such as an
updated_attimestamp). Cheaper than a full refresh, but deletes aren't captured. - Append only – new rows are appended using a cursor field; existing rows are never updated. Ideal for immutable, append-only tables like event logs.
- Full refresh – the whole table is reloaded on every sync. Use it when a table has no reliable cursor or when you need deletions reflected.
See sync methods for a full explanation of how each mode works and how to choose between them.
All Anvil tables are full refresh. Each sync replaces the contents of the table.
Configuration
| Option | Type | Required |
|---|---|---|
API key | password | Yes |
Supported tables
| Table | Description | Sync method | Incremental field | Primary key |
|---|---|---|---|---|
organizations | The Anvil organizations your API key's user belongs to | Full refresh | — | — |
casts | PDF templates, fetched per organization | Full refresh | — | — |
welds | Workflow definitions, fetched per organization | Full refresh | — | — |
weld_datas | Workflow submissions, fetched per workflow (one page walk per weld), so syncs scale with the number of workflows | Full refresh | — | — |
etch_packets | E-signature packets with their signer status, fetched per organization | Full refresh | — | — |
Troubleshooting
- If the connection fails with an authorization error, the API key is wrong, expired, or has been revoked. Create a new one, then reconnect the source.
- If a table syncs no rows, the credential may not have access to that data. Check its permissions, then reconnect the source.
If your sync is failing or data looks wrong, see the Data warehouse troubleshooting guide. If that doesn't help, contact support – we're happy to help.