# lev8 API

> Build live-web people and business intelligence into your product.

## Docs

- [Contact Search](https://docs.lev8.com/api-reference/contact-search.md): Find an email address or phone number for a contact using a natural-language objective.
- [Credit balance](https://docs.lev8.com/api-reference/credit-balance.md): Query the credits currently available to the billing account attached to an API key.
- [Entity Search](https://docs.lev8.com/api-reference/entity-search.md): Search for people, companies, stores, and creators with a natural-language objective.
- [Errors](https://docs.lev8.com/api-reference/errors.md): Handle lev8 HTTP errors, JSON request failures, and failures after an SSE stream begins.
- [Streaming events](https://docs.lev8.com/api-reference/streaming-events.md): Consume Entity Search SSE batches, completion events, and in-stream errors.
- [Authentication](https://docs.lev8.com/authentication.md): Use lev8 API keys safely from trusted server-side environments.
- [Credits and billing](https://docs.lev8.com/guides/billing.md): Understand reservation, settlement, release, and reconciliation behavior.
- [Idempotency](https://docs.lev8.com/guides/idempotency.md): Prevent duplicate search execution and duplicate billing.
- [lev8 API](https://docs.lev8.com/index.md): Search the live web for entities and contact details from your application.
- [Quickstart](https://docs.lev8.com/quickstart.md): Make your first Entity Search request and consume the SSE response.

## Optional

- [Lev8](https://lev8.com)
- [GitHub](https://github.com/simplexai-labs/lev8-api-docs)