402only
Based on Coinbase x402 Protocol · Solana Chain Implementation

402 Payment Required

HTTP is no longer just a communication protocol. It starts charging.

💠 402only — enabling Web, AI & APIs to complete payments automatically.

⚡ Try Demo ▣ View 
→ GET /ai/insight HTTP/1.1

Feature Showcase

Experience the core of 402only

GPT-5

OpenAI
Active
Amount
0.03 USDC
Requests
0

Claude

Anthropic
Paying
Amount
0.02 USDC
Requests
0

DeepSeek

DeepSeek AI
Idle
Amount
0.01 USDC
Requests
0

Gemini

Google
Active
Amount
0.025 USDC
Requests
0

Grok

xAI
Paying
Amount
0.04 USDC
Requests
0

Perplexity

Perplexity AI
Idle
Amount
0.015 USDC
Requests
0

API Call Demo

POST /api/image HTTP/1.1
Host: api.example.com
Authorization: 402only-Pay
Content-Type: application/json

{"prompt": "Generate abstract art"}

← HTTP/1.1 200 OK
✓ Payment verified via 402only
{"image_url": "https://cdn.example.com/img.png"}

Key Features

Payment solutions built for the modern Web

Technical Overview

🔗

Based on x402 Protocol

Open payment standard proposed by Coinbase. Uses HTTP 402 for automatic payment flows.

⛓️

Solana Chain Implementation

High-speed, low-cost on-chain settlements.

🚀

No Account Intermediary

No registration, no middlemen — truly decentralized experience.

“I don't need passwords or trust. When 402 rings, the system pays itself.”