---
# System prepended metadata

title: mevETH Relay Config - Confidential Documentation

---

# mevETH Relay Config - Confidential Documentation

This short documentation is aimed at validators that want to test our futures market on Holesky.

## []("Configuration")Configuration

The relay is permissioned and currently protected by Basic Auth. We currently use a shared token for the testing phase.

### Relay URL:

[https://0xa357078fe39a532623a366d44fa27052bd6aef14e78774202afab660fa2eda3051c43c6d94167c8222ebe5ad30ae517d@holesky-auction.securerpc.com](https://0xa357078fe39a532623a366d44fa27052bd6aef14e78774202afab660fa2eda3051c43c6d94167c8222ebe5ad30ae517d@holesky-auction.securerpc.com/)

### Basic Auth:

-   User: `0xa357078fe39a532623a366d44fa27052bd6aef14e78774202afab660fa2eda3051c43c6d94167c8222ebe5ad30ae517d`
-   Password: `OXhiR95xx4BQsHeTK0hLta7OShODnuKPZNiKNO9GE=`

## [](#)Example: Nginx configuration on Ubuntu

If your validator doesn’t support connecting to a Basic Auth endpoint, you can use nginx to act as a reverse-proxy and inject the necessary header.

1.  `apt install nginx`
    
2.  Add the following content to `/etc/nginx/sites-available/holesky-auction`
    

```conf
server {
	listen 127.0.0.1:1337 default_server ;
	server_name holesky-auction ;
	location / {
		proxy_pass https://holesky-auction.securerpc.com;
		# Upgrade protocol to HTTP/1.1
		proxy_http_version 1.1;
		proxy_set_header   "Connection" "";
		# Add authentication
		proxy_set_header Authorization "Basic MHhhMzU3MDc4ZmUzOWE1MzI2MjNhMzY2ZDQ0ZmEyNzA1MmJkNmFlZjE0ZTc4Nzc0MjAyYWZhYjY2MGZhMmVkYTMwNTFjNDNjNmQ5NDE2N2M4MjIyZWJlNWFkMzBhZTUxN2Q6T1hoaVI5NXh4NEJRc0hlVEswaEx0YTdPU2hPRG51S1BaTmlLTk85R0U9";
		# Allow streaming of requests and responses
		proxy_cache off;
		proxy_buffering off;
	}
}

```

3.  Enable the site: `ln -s /etc/nginx/sites-available/holesky-auction /etc/nginx/sites-enabled/`
4.  Reload the nginx config: `systemctl restart nginx`
5.  Point your builder **exclusively to** `http://0xa357078fe39a532623a366d44fa27052bd6aef14e78774202afab660fa2eda3051c43c6d94167c8222ebe5ad30ae517d@127.0.0.1:1337`  

## Additional Help

See Private Telegram chat for more help
