# tunnel.to

> Public tunnels for localhost AI agents, developer apps, webhooks, SSE streams, and WebSocket services.

tunnel.to creates public URLs for local services through outbound relay connections. It supports IPv4 and IPv6-capable local upstream targets. IPv6 literals must use URL bracket notation, for example `tunnelto '[::1]:3000'` or `tunnelto 'http://[::1]:3000'`.

## Core Pages

- Home: https://tunnel.to/
- Downloads: https://tunnel.to/download
- Pricing: https://tunnel.to/pricing
- Relay status: https://tunnel.to/relays
- Docs: https://tunnel.to/docs
- IPv6 support: https://tunnel.to/docs/ipv6
- API registration: https://tunnel.to/docs/api-registration
- OpenAPI schema: https://tunnel.to/openapi.json
- Sitemap: https://tunnel.to/sitemap.xml

## IPv6 Notes

- Client targets: bracketed IPv6 literals are supported.
- Relay listeners: use `TUNNELTO_RELAY_ADDR=:8080` or `TUNNELTO_RELAY_ADDR=[::]:8080` for IPv6-capable binds, subject to operating system and proxy behavior.
- Public DNS: publish AAAA records for relay hostnames when public IPv6 reachability is required.
- Forwarded metadata: IPv6 source addresses are accepted in `X-Forwarded-For`, `X-Real-IP`, rate-limit keys, and blocklist entries.

## Install

```bash
brew tap tunnel-to/tunnelto
brew trust --formula tunnel-to/tunnelto/tunnelto
brew install tunnelto
tunnelto 3000
```

```bash
curl -fsSL https://tunnel.to/install.sh | bash
tunnelto '[::1]:3000'
```