> AI agents: this is one page from PostHog's docs. Full index of Markdown docs for LLMs: https://posthog.com/llms.txt

# Linking CoinAPI as a source

Canonical URL: https://posthog.com/docs/data-pipelines/sources/coin-api

> **Cloud region:** This page uses US Cloud hosts. For an EU Cloud project, use `https://eu.posthog.com` instead of `https://us.posthog.com` or `https://app.posthog.com` (app host for links).

## On this page

- [Prerequisites](#prerequisites)
- [Adding a data source](#adding-a-data-source)
- [Sync modes](#sync-modes)
- [Configuration](#configuration)
- [Supported tables](#supported-tables)
- [Troubleshooting](#troubleshooting)

**Beta release**

This source is currently in **beta**. It works end to end, but you may still hit rough edges. [Let us know](https://us.posthog.com/#panel=support%3Asupport%3Adata_warehouse%3A%3Atrue) if you do.

![](https://res.cloudinary.com/dmukukwp6/image/upload/texture_tan_9608fcca70)

![](https://res.cloudinary.com/dmukukwp6/image/upload/texture_tan_dark_a92b0e022d)

Let AI connect your sources for you

Skip the manual setup — run this in your project and the wizard auto-detects your databases and APIs and connects them to PostHog.

`npx @posthog/wizard warehouse`

![PostHog Wizard hedgehog](https://res.cloudinary.com/dmukukwp6/image/upload/wizard_3f8bb7a240.png)

![](https://res.cloudinary.com/dmukukwp6/image/upload/wizard_3f8bb7a240.png)Let AI connect your sources for you

The CoinAPI connector syncs cryptocurrency market data – assets, exchanges, symbols, exchange rates, and OHLCV and trade history – into PostHog, so you can analyze it alongside your product data.

## Prerequisites

You need a CoinAPI account so you can create an API key. CoinAPI uses a credit/quota-based (pay-as-you-go) model with a daily credit limit, so large time-series tables can consume significant credits.

## Adding a data source

1.  In PostHog, go to the [Sources tab](https://app.posthog.com/data-management/sources) of the data pipeline section.
2.  Click **\+ New source** and click **Link** next to this source.
3.  Enter your credentials (see [Configuration](#configuration) below) and click **Next**.
4.  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 CoinAPI, you'll need:

-   **API key** – create a key in the [CoinAPI customer portal](https://customer.coinapi.io/).

The reference tables (assets, exchanges, symbols) and exchange rates sync with just an API key. The OHLCV and trades history tables are scoped to a single market, so set the Symbol ID field (and, for OHLCV, the Period ID) to enable them.

## 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_at` timestamp). 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](https://posthog.com/docs/data-pipelines/sources.md#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 |
| `Exchange rate base asset` | text | No |
| `Exchange rate quote asset` | text | No |
| `Symbol ID` | text | No |
| `Period ID` | text | No |
| `Metric ID` | text | No |
| `Start date` | text | No |

## Supported tables

| Table | Description | Sync method | Incremental field | Primary key |
| --- | --- | --- | --- | --- |
| `assets` | Every asset CoinAPI tracks (cryptocurrencies and fiat), with volume and price metadata. | Full refresh | — | — |
| `exchanges` | Every exchange CoinAPI tracks, with coverage dates and volume metadata. | Full refresh | — | — |
| `symbols` | Every symbol (market) CoinAPI tracks across all exchanges, with its component assets. | Full refresh | — | — |
| `metrics_listing` | Every metric CoinAPI supports, with its description. The lookup table behind the metric history tables. | Full refresh | — | — |
| `exchange_rates` | Current exchange rate from the configured base asset to every other asset, one row per quote asset. | Full refresh | — | — |
| `ohlcv_history` | Requires a Symbol ID on the source. Only syncs the configured series. | Incremental, Full refresh | time\_period\_start | — |
| `trades_history` | Requires a Symbol ID on the source. Only syncs the configured series. | Incremental, Full refresh | time\_exchange, time\_coinapi | — |
| `exchange_rates_history` | Requires an Exchange rate quote asset on the source. Only syncs the configured series. | Incremental, Full refresh | time\_period\_start | — |
| `metrics_symbol_history` | Requires a Symbol ID and a Metric ID on the source. Only syncs the configured series. | Incremental, Full refresh | time\_period\_start | — |
| `quotes_history` | Requires a Symbol ID on the source. Only syncs the configured series. | Incremental, Full refresh | time\_exchange, time\_coinapi | — |

## Troubleshooting

-   If you see an invalid or incorrectly formatted key error, create a new key in the CoinAPI customer portal, then reconnect.
-   If access is denied, check that your CoinAPI subscription covers the data you're trying to sync, then reconnect.

If your sync is failing or data looks wrong, see the [Data warehouse troubleshooting guide](https://posthog.com/docs/data-warehouse/troubleshooting.md). If that doesn't help, [contact support](https://us.posthog.com/#panel=support%3Asupport%3Adata_warehouse%3A%3Atrue) – we're happy to help.