> ## Documentation Index
> Fetch the complete documentation index at: https://docs.enrichley.io/llms.txt
> Use this file to discover all available pages before exploring further.

# API reference

> Authenticate with the Enrichley API and understand usage limits.

# Enrichley API overview

Enrichley helps you recover valid emails that other verification tools discard, especially **catch-all** and other "risky" emails. On average, 40–60% of unverified lists contain catch-all emails, and Enrichley's verification is built to recover as many of these as possible—often resulting in **20–30% more valid emails** on the same lists.

## Base URL

```text theme={null}
https://api.enrichley.io/api/v1
```

## Authentication

All requests are authenticated with an API key via the `X-Api-Key` header:

```http theme={null}
X-Api-Key: YOUR_API_KEY
```

API keys are generated automatically when you [sign up for a paid plan](https://app.enrichley.io/sign-up). Once you have a paid plan, find your key on your [profile page](https://app.enrichley.io/profile) — it works across all Enrichley APIs.

## Rate limits

* 10 requests per second

If you need higher throughput, contact support.

## Endpoints overview

The main public endpoints currently available are:

* `POST /validate-single-email` — Validate a single email address and return its validation status.
* `GET /me` — Retrieve information about your API key, including monthly and remaining credits.