Introduction

This section covers how to authenticate, make your first API call and use Xerberus GraphQL endpoint.

---

1. API Endpoint

All GraphQL queries should be sent as POST requests to:

https://xerberus-metrics-api-515850710964.us-central1.run.app/graphql

---

2. Authentication

Access to the API is secured using an API Key.

How to Use the API Key

Send your API key using the x-api-key and x-user-emailHTTP header in each request:

x-api-key: YOUR_SECRET_KEY
x-user-email: EMAIL_ASSOCIATED_WITH_KEY

Example with curl:

curl -X POST https://xerberus-metrics-api-515850710964.us-central1.run.app/graphql \
  -H "Content-Type: application/json" \
  -H "x-api-key: YOUR_SECRET_KEY" \
  -d '{"query":"{ chains }"}'

3. Example Query

Here is a minimal example to fetch supported chains:

query GetChains {
  chains
}

Expected response:

{
  "data": {
    "chains": ["ETHEREUM", "POLYGON", "CARDANO", "BASE_PROTOCOL"]
  }
}

4. SDK Available

We provide a Python SDK for easier integration. You can use it to programmatically query metrics, tokens, chains, and more.

Check out the SDK docs or visit the GitHub repo:

https://www.github.com/...www.github.com