Linking CoinMarketCap as a source
This source is currently in alpha. The interface and available tables may change.
The CoinMarketCap connector syncs cryptocurrency and market data into PostHog, so you can analyze crypto and market data alongside your product data.
Prerequisites
You need a CoinMarketCap account with a Pro API key. Some endpoints, such as exchanges, require a higher plan tier.
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.
When linking CoinMarketCap, you'll need:
- API key – create one from your CoinMarketCap developer dashboard. The key grants read access to every endpoint.
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.
Configuration
| Option | Type | Required |
|---|---|---|
API key | password | Yes |
Supported tables
The tables available from this source are discovered from your account when you connect it, so the exact list depends on your data. Once connected, you can pick which tables to sync from the sources tab.
Troubleshooting
- If your API key is invalid or has been revoked, create a new key in your CoinMarketCap developer dashboard, then reconnect.
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.