> For the complete documentation index, see [llms.txt](https://clarity-7.gitbook.io/clarity-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://clarity-7.gitbook.io/clarity-docs/consumer-walkthrough/01-prerequisites.md).

# 1. Prerequisites

Before checkout, confirm your environment and billing choice.

## What you need

* **Linux server** — Ubuntu 22.04+ or RHEL-compatible bare-metal (Cherry VPS or your own host)
* **Runtime stack** — Node.js 20+, PM2, nginx, certbot
* **Email** — used for Spark checkout and JWT issuance
* **Clarity Wallet** — optional until per-run agent debits; required for wallet handoff when balance is low

## Recommended tiers

| Tier         | Price    | Best for                                           |
| ------------ | -------- | -------------------------------------------------- |
| WEBB Starter | $5.99/mo | Launch a starter agent, read gated docs            |
| Dev Portal   | $29/mo   | Full agent upload, Cherry deploy, instruction book |
| Wallet Fund  | $29 min  | Top up CLRTY PAY for per-run agent SKUs            |

## Cherry reference

Production docs reference Cherry host **`84.32.109.227`**. SSH access is an **operator action** — you run install scripts on the machine you control.

## Install path

All consumer nodes target:

```
/opt/clrty/swarm-node
```

**NO Docker** — agents run under PM2 or systemd only.

## Before you pay

1. Pick a tier in [Pay Gate Checkout](/clarity-docs/consumer-walkthrough/02-pay-gate-checkout.md)
2. Have your checkout email ready (matches JWT `customer_email`)
3. Plan SSH access to your bare-metal host for [Install on Cherry](/clarity-docs/consumer-walkthrough/06-install-cherry.md)

## Next step

→ [2. Pay Gate Checkout](/clarity-docs/consumer-walkthrough/02-pay-gate-checkout.md)


---

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