diff --git a/COMMERCIAL.md b/COMMERCIAL.md
index 17b460c..dfd98e8 100644
--- a/COMMERCIAL.md
+++ b/COMMERCIAL.md
@@ -1,6 +1,6 @@
 # Commercial licensing
 
-BotWire is open source under the [GNU Affero General Public License v3](LICENSE) (AGPL-3.0). A commercial license is available when AGPL terms do not fit your use case.
+BotWire is open source under the [GNU Affero General Public License v3](LICENSE) (AGPL-3.0). A commercial license is available when AGPL terms do not fit your use case — and for most closed-source products, buying one is simpler and cheaper than meeting AGPL's source-disclosure obligations.
 
 ## What AGPL means for commercial users
 
@@ -10,24 +10,39 @@ AGPL is a good fit when you can open-source your changes or when your use does n
 
 ## What a commercial license provides
 
-A commercial license from Object IT Limited typically allows:
+A commercial license from Object IT Limited lets you:
 
-- Use of BotWire in **proprietary** products and services
-- Distribution **without** AGPL source-code disclosure obligations for your application
-- A **direct licensing relationship** with the copyright holder, separate from the public AGPL terms
+- Use BotWire in **proprietary** products and services
+- Distribute **without** AGPL source-code disclosure obligations for your application
+- Hold a **direct licensing relationship** with the copyright holder, separate from the public AGPL terms
 
-Specific terms (scope, pricing, support, updates) are agreed per customer. This document is informational only and does not constitute an offer.
+If you'd otherwise be paying for a hosted support tool like Zendesk, Intercom, or Azure's bot services, a one-off or annual BotWire license is typically a fraction of those subscriptions — and you keep full control of your data and hosting.
 
-## How to get in touch
+## Pricing
 
-Go to **[objectit.co.nz/botwire](https://www.objectit.co.nz/botwire)** and click **"Get a License"** to start a commercial-licensing conversation with Object IT Limited. Please include:
+All prices are in USD. Final tax (VAT/GST/sales tax) is calculated and shown at checkout based on your location.
 
-- Your company name and contact email
-- How you plan to use BotWire (internal tool, SaaS, embedded in a product, etc.)
-- Whether you need redistribution rights for a closed-source product
+| License | Price | What you get |
+|---|---|---|
+| **Annual commercial license** | **$599 / year** | Right to use BotWire in closed-source / proprietary products and services without AGPL source-disclosure obligations. Includes all updates released during your active subscription. [Buy the annual license](https://objectit.lemonsqueezy.com/checkout/buy/ac21528d-f7f7-4847-8201-e545bcbe22e5) |
+| **Perpetual buy-out license** | **$1,499 one-time** | Perpetual commercial-use rights to the current version **and all future versions**. One-time payment, no renewal — the "no recurring fees" option for businesses that prefer a one-time capital purchase. [Buy the perpetual license](https://objectit.lemonsqueezy.com/checkout/buy/5c124e41-c354-4ccd-b5cb-d1e46676984a) |
 
-We will respond with next steps for licensing terms and pricing.
+**If an annual subscription lapses:** instances you've already deployed are not retroactively revoked, but you lose the right to use *new* versions commercially. To keep using newer releases commercially, either renew or comply with AGPL.
 
-Prefer GitHub? You can instead open a [GitHub Discussion](https://github.com/adamy/BotWire/discussions) with the label **commercial-license**.
+### How purchasing works
 
-For general technical questions unrelated to licensing, use Discussions or open an issue on the repository.
+Checkout is handled by [Lemon Squeezy](https://www.lemonsqueezy.com/), acting as Merchant of Record. They calculate and collect any applicable tax/VAT at checkout, handle invoicing, and deliver your license key automatically by email immediately after payment — there's no manual step on our side. The binding license terms are included with your purchase.
+
+## Support
+
+A commercial license grants **usage rights only**. It does **not** include any support commitment, SLA, or guaranteed response time. We've kept it this way deliberately so the price stays low and predictable.
+
+- **Updates and bug fixes** are published on the maintainer's own schedule via [GitHub releases](https://github.com/adamy/BotWire/releases). Paying customers and community (AGPL) users receive them the same way.
+- **Public GitHub [Issues](https://github.com/adamy/BotWire/issues) and [Discussions](https://github.com/adamy/BotWire/discussions)** are open to everyone and are best-effort, with no guaranteed response time.
+- If you need **guaranteed response times or one-on-one integration help**, a **Priority email support** add-on is available, quoted per case (it's separate from the license). Email us via the contact page below to inquire.
+
+## Questions & priority support
+
+For the **Priority email support** add-on, or for any non-standard licensing question (volume, redistribution beyond the standard terms, etc.), reach us at **[objectit.co.nz/botwire](https://www.objectit.co.nz/botwire)**, or open a [GitHub Discussion](https://github.com/adamy/BotWire/discussions) with the label **commercial-license**.
+
+The standard $599/year and $1,499 one-time licenses don't need a conversation — just use the checkout links above and your key arrives automatically.
diff --git a/README.md b/README.md
index 76d5a5f..4cd381f 100644
--- a/README.md
+++ b/README.md
@@ -121,6 +121,7 @@ Reach for BotWire when you want to:
 
 | Property | Default | Description |
 |---|---|---|
+| `LicenseKey` | `null` | Commercial license key from Lemon Squeezy. Required for closed-source use under the commercial license; not needed for AGPL-compliant deployments. Validation is not enforced in this release. |
 | `TopicDescription` | *(required)* | Short phrase describing your support scope, injected into the system prompt. Also enables the off-topic guard. |
 | `Documents` | `[]` | Paths to Markdown knowledge-base files. |
 | `ChatProvider` | *(required)* | LLM provider — `ApiKey`, `Model`, optional `BaseUrl` for OpenAI-compatible APIs (e.g. DeepSeek), optional `Temperature`. |
@@ -413,4 +414,9 @@ BotWire is open source under the [AGPL v3](LICENSE) — free to self-host, with
 
 ### Commercial license
 
-If AGPL doesn't fit (e.g. you ship BotWire inside a closed-source product), a commercial license is available. Click **[Get a License](https://www.objectit.co.nz/botwire)** at objectit.co.nz/botwire to start the conversation — see [COMMERCIAL.md](COMMERCIAL.md) for an overview.
+Shipping BotWire inside a closed-source product? You don't have to deal with AGPL compliance — just buy an affordable commercial license and use it in proprietary code.
+
+- **$599/year** for an annual license (includes updates while active), or **$1,499 one-time** for a perpetual buy-out covering current and future versions.
+- Self-serve checkout via Lemon Squeezy; your license key is delivered automatically. Licenses are **usage-only** — priority support is a separate paid add-on, not included.
+
+See [COMMERCIAL.md](COMMERCIAL.md) for full details, the support boundary, and checkout links.
diff --git a/samples/BasicEmail/Program.cs b/samples/BasicEmail/Program.cs
index 2d1e76f..91560d2 100644
--- a/samples/BasicEmail/Program.cs
+++ b/samples/BasicEmail/Program.cs
@@ -30,6 +30,7 @@
 
 builder.Services.AddBotWire(opts =>
 {
+    // opts.LicenseKey = "XXXX-XXXX-XXXX-XXXX"; // Commercial license key (required for closed-source use)
     opts.TopicDescription = "Customer support for Acme Store";
     opts.Documents        = [Path.Combine(AppContext.BaseDirectory, "docs", "faq.md")];
     opts.ChatProvider     = new OpenAIProviderOptions
diff --git a/src/BotWire.AspNetCore/BotWireOptions.cs b/src/BotWire.AspNetCore/BotWireOptions.cs
index f1b2f33..eef4e6f 100644
--- a/src/BotWire.AspNetCore/BotWireOptions.cs
+++ b/src/BotWire.AspNetCore/BotWireOptions.cs
@@ -24,6 +24,15 @@ namespace BotWire.AspNetCore;
 /// <summary>Top-level configuration for the BotWire support bot.</summary>
 public sealed class BotWireOptions
 {
+    /// <summary>
+    /// Commercial license key issued by Lemon Squeezy at purchase.
+    /// Required for closed-source / proprietary use under the commercial license;
+    /// not required for AGPL-compliant open-source use.
+    /// License validation is not enforced in this release and is planned for a
+    /// future version.
+    /// </summary>
+    public string? LicenseKey { get; set; }
+
     /// <summary>Short description of the support topic, injected into the system prompt.</summary>
     [Required]
     public string TopicDescription { get; set; } = "";