# Inflection

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The Amplitude Inflection integration streams events and user properties from Amplitude to [Inflection](https://www.inflection.io/). Use Amplitude product activity to build audiences, trigger journeys, and personalize messaging in Inflection.

## Use cases

- **Onboarding journeys**: Trigger personalized onboarding sequences when a user completes a key product milestone, like activating a core feature.
- **Re-engagement**: Identify users who haven't returned to a feature in a set number of days and enroll them in a targeted campaign.
- **Feature adoption**: Nudge users who've activated a product area but haven't converted to deeper usage.
- **Unified audiences**: Combine Amplitude behavioral data with attributes from other sources in Inflection to build more precise audience segments.

## Considerations

- This integration is unidirectional. Amplitude sends data to Inflection; Inflection can't send data back to Amplitude.
- You need admin access to both your Amplitude project and your Inflection workspace.
- Contact the Inflection team before setup to get your `X-Inflection-App-Id` value.

## Set up the integration

### Prerequisites

To configure streaming from Amplitude to Inflection, you need:

- An Amplitude account with permission to configure destinations.
- An Inflection account with admin access.
- An Inflection API key and endpoint URL (generated in Inflection).
- An `X-Inflection-App-Id` value from the Inflection team.

### Inflection setup

1. In Inflection, navigate to **Connections** and select **Amplitude**.
2. Click **Generate API Key**.
3. Copy the **API key** and note the endpoint URL. You need both when configuring Amplitude.

### Create a new sync

This integration uses Amplitude's Webhook destination with Inflection-specific credentials.

1. In Amplitude Data, click **Catalog** and select the **Destinations** tab.
2. Search for **Webhook** and select **Webhook: Events · User Properties**.
3. Enter a sync name, then click **Create Sync**.

### Enter credentials

1. In **Webhook URL**, enter `https://amplitude.webhook.inflection.io/integrations/amplitude/events`.
2. Add the following headers:

   - `Authorization`: `Bearer <your-inflection-api-key>`
   - `X-Inflection-App-Id`: `<your-inflection-app-id>`

### Configure event forwarding

1. Configure the event payload using a FreeMarker template. Refer to [Inflection's documentation](https://docs.inflection.io/connections/amplitude) for the recommended event payload template.
2. Under **Send Events**, enable the toggle to stream events to Inflection. Amplitude forwards events when it ingests them; this integration doesn't send events on a schedule or on demand.
3. In **Select and filter events**, choose which events you want to send. Send only the events you need in Inflection.

### Configure user forwarding

1. Configure the user payload using a FreeMarker template. Refer to [Inflection's documentation](https://docs.inflection.io/connections/amplitude) for the recommended user payload template.
2. Under **Send Users**, enable the toggle to stream user property updates to Inflection. Amplitude sends users when it receives an event and when you call the [Identify API](https://amplitude.com/docs/apis/analytics/identify).

### Enable sync

When you finish your configuration, toggle the **Status** to **Enabled** at the top of the page and click **Save**.