> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.usebridge.com/documentation/getting-started/eligibility-sdk/analytics/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.usebridge.com/_mcp/server.

The SDK emits analytics events throughout the eligibility flow.

## React

Implement `AnalyticsHandler` and pass it to `BridgeSdkProvider`:

```typescript
import { BridgeSdkProvider } from "@usebridge/sdk-react"
import type { AnalyticsHandler, AnalyticsEvent, AnalyticsEventName } from "@usebridge/sdk-react"

const myAnalyticsHandler: AnalyticsHandler = {
  onEvent<T extends AnalyticsEventName>(event: T, data: AnalyticsEvent<T>) {
    // Send to your analytics service
  },
  onError(error: Error) {
    // Handle fatal errors
  },
}

<BridgeSdkProvider
  config={{
    publishableKey: "pk_...",
    analyticsHandler: myAnalyticsHandler,
  }}
>
```

## TypeScript

Implement `AnalyticsHandler` and pass it to `createBridgeClient`:

```typescript
import { createBridgeClient } from "@usebridge/sdk";
import type {
  AnalyticsHandler,
  AnalyticsEvent,
  AnalyticsEventName,
} from "@usebridge/sdk-core";

const myAnalyticsHandler: AnalyticsHandler = {
  onEvent<T extends AnalyticsEventName>(event: T, data: AnalyticsEvent<T>) {
    // Send to your analytics service
  },
  onError(error: Error) {
    // Handle fatal errors
  },
};

const bridge = createBridgeClient({
  publishableKey: "pk_...",
  analyticsHandler: myAnalyticsHandler,
});
```

## Event Types

The SDK emits events at key points in the eligibility flow, to the `onEvent` callback.

### SDK Events

| Event Name        |
| ----------------- |
| `sdk.initialized` |
| `sdk.error`       |

### Input Events

| Event Name            |
| --------------------- |
| `input.payer.search`  |
| `input.state.updated` |

### Soft Eligibility Events

| Event Name                                     |
| ---------------------------------------------- |
| `soft_eligibility.session.created`             |
| `soft_eligibility.session.submit`              |
| `soft_eligibility.session.updated`             |
| `soft_eligibility.session.complete.eligible`   |
| `soft_eligibility.session.complete.ineligible` |

### Hard Eligibility Events

| Event Name                                             |
| ------------------------------------------------------ |
| `hard_eligibility.session.created`                     |
| `hard_eligibility.session.submit`                      |
| `hard_eligibility.session.updated`                     |
| `hard_eligibility.session.complete.eligible`           |
| `hard_eligibility.session.complete.ineligible`         |
| `hard_eligibility.session.policy`                      |
| `hard_eligibility.session.complete.out_of_network`     |
| `hard_eligibility.session.optimistic_soft_check.error` |

Each event includes relevant context data, such as session identifiers, input values, status information, and error details.
For specific payload definitions, explore the types exported from the package.

## Error Handling

The `onError` callback is invoked when errors are thrown from within the SDK.