# Blockchain Service Endpoint

To communicate with the blockchain networks, an endpoint is needed to send/receive messages and transactions utilizing the interfacing in MASQ Software, conforming to standard [JSON-RPC format](https://eth.wiki/json-rpc/API) on Ethereum (and thus Polygon).

This endpoint URL is saved under the `--blockchain-service-url` in the software, and allows a user to use their own endpoints instead of Public RPC Endpoints (such as Cloudflare, MyEtherWallet or the Polygon aggregated RPCs)

**Here are a list of providers that currently support free and premium accounts, which can be used for MASQ Node by providing a endpoint URL:**

### [Alchemy](https://www.alchemy.com) (recommended for Polygon Amoy)

#### Important links:

Documentation: <https://docs.alchemy.com>

Polygon API: <https://docs.alchemy.com/alchemy/apis/polygon-api>

### [Infura](https://infura.io)

#### Important links:

Documentation: <https://infura.io/docs/ethereum>

Network Endpoint formats:&#x20;

### Nodies (recommended for Amoy and Base Sepolia)

#### Important links:

Documentation: <https://docs.nodies.app/>

#### <https://www.nodies.app/auth/register>

#### Free Endpoint: `https://lb.nodies.app/v1/6a17e9caa9f1424c87be69746244a8c8`

{% hint style="info" %}
Polygon Network endpoints and providers are also found on their Network Documentation:

<https://docs.polygon.technology/docs/develop/network-details/network/>
{% endhint %}