# ==> Deploying...

By [Billy](https://paragraph.com/@billymeth) · 2025-11-06

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**Closed Beta Is LIVE**
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**(First x402 Open Market on Solana)**
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_— Billy (@biiiymeister), X4A dev. November 6, 2025, 6:19 PM CET. From the trenches…_

**CLOSED BETA IS OPEN. RIGHT NOW.** **DATABASE WIPES IN 48 HOURS.**

This is the **first x402-powered open marketplace on Solana**. No KYC. No API keys. No bullshit. Just **HTTP 402 "Payment Required"** — agents, humans, anyone can list, buy, sell.

**GO NOW:** [x4a.ai/market](https://x4a.ai/market) **Deployer docs:** [github.com/x4a-core/market/FULL\_UPGRADE\_GUIDE.md](https://github.com/x4a-core/market/blob/main/FULL_UPGRADE_GUIDE.md)

Let’s break it down.

**2/12** **How It Works – Closed Beta (Mainnet but open to users for test)**

You list an item → It asks for **Solana contract address (CA)** → We **fetch metadata live** → You set price in **USDC** → Buyer hits **402 challenge** → Pays via **PDA escrow** → Item delivered. Done.

**No real products.** **Everything wipes in 48h this is a test but proof what we are building.**

This is **stress testing the rails** for other platforms , they won’t like it.

![](https://storage.googleapis.com/papyrus_images/98aabb9fcd17f0b4c27efcc8bf1ed187b3e03a15722ef655ff30d72bb570dbc6.png)

**3/12** **Phase 1: Tokenized Listings (LIVE NOW)**

Got a Pump.fun meme? Got an SPL token? Got a digital product?

**Put the CA.** We pull:

*   Name
    
*   Symbol
    
*   Supply
    
*   Metadata
    
*   Image
    

![](https://storage.googleapis.com/papyrus_images/5c940f00e620633761e0b20042d5df5eb0fd5645f59c3170b7c149346ac9365f.png)

You set:

*   Price (USDC)
    
*   Description
    
*   "Payment Required" message
    

Buyer pays → item transfers → **x402 headers logged**.

![I set X4A CA to X402-GOLD (X402AU) for better view of chart.](https://storage.googleapis.com/papyrus_images/c185d05d9ef678194295219d5cb35b94231067daef39fec548dfa424eac7066e.png)

I set X4A CA to X402-GOLD (X402AU) for better view of chart.

**4/12** **Phase 2: Open Beta (Next Week)**

Same flow, but:

*   **Bonding curves** (Pump.fun style, but better)
    
*   **Launchpad integration** (yes, the one that got nuked by trademark — now reborn, legal, clean)
    
*   **Multi-sale support** (1 item → 100 buyers → 100 txs)
    
*   **Agent-to-agent sales** (your agent buys from another)
    

**eBay + Amazon + x402 = X4A Market**

**5/12** **Real Use Cases (Coming Soon)**

*   **Azuki drops merch** → list via CA → fans pay x402 → NFT + physical ship
    
*   **Artist sells 1/1 digital art** → tokenized on Solana → x402-gated
    
*   **Dev sells API credits** → pay per call → no subs
    
*   **Meme lord sells "ownership" of viral gif** → x402 paywall
    

**Tokenize anything. Sell via x402.**

**6/12** **The Tech: Why This Is Different**

Everyone's "building x402 agents" — but 99% are:

*   Scraping x402 txs
    
*   Copy-pasting PayAI endpoints
    
*   No real utility
    

**X4A is different:**

*   **Native x402 compliance** (headers, escrow, burns)
    
*   **Solana PDAs** for atomic delivery
    
*   **X402AU burns** on every sale (0.1% + weighted)
    
*   **Grok Business backend** (unlimited calls, fine-tuned)
    

We’re not riding the wave. We’re **building the ocean**.

**7/12** **Closed Beta Rules (48h Only)**

*   **List anything**: Memes, gifs, fake products, test tokens
    
*   **Use USDC**
    
*   **No real delivery**
    
*   **Have fun**
    
*   **Stress the system**
    

**Database wipe: November 8, 2025, 6:19 PM CET**

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*Originally published on [Billy](https://paragraph.com/@billymeth/deploying)*