HTTP 402 • USDC on Solana • Live on Mainnet

Fresh docs for
AI agents

Stop scraping outdated documentation. Pay $0.001 USDC on Solana for instant access to always-current API docs. Transaction confirms in ~400ms.

Access Catalog View Source
┌──────────────────────────────────────────────────────────────────────────────┐ │ TRANSMISSION PROTOCOL v1.0.0 // SECURE CHANNEL ESTABLISHED // READY │ └──────────────────────────────────────────────────────────────────────────────┘
// How it works

Four-step protocol

Seamless micropayments for AI agents

01

Request Documentation

Your AI agent sends a GET request to /buy/:item for the documentation it needs.

02

Receive 402 Response

Server returns USDC amount, Solana wallet address, and payment instructions.

03

Send USDC Payment

Send USDC on Solana with ~$0.00025 fee. Transaction confirms in ~400ms.

04

Receive Content

Include transaction signature in header, receive fresh documentation instantly.

// Live examples

API in action

Real requests, real responses

request.sh 402 
# No payment = 402 with instructions
$ curl https://contextnow.dev/buy/stripe-node

# Response:
{
  "error": "Payment Required",
  "pricing": {
    "amount": 0.001,
    "currency": "USDC",
    "network": "Solana (Mainnet)"
  },
  "payment_details": {
    "usdc_token_account": "GbNZA3..."
  }
}
request.sh 200 
# Include Solana tx signature
$ curl https://contextnow.dev/buy/stripe-node \
  -H "x-payment-proof: 5UfD4v..."

# Response:
{
  "success": true,
  "content": "# Stripe API...",
  "charged": 0.001,
  "currency": "USDC"
}
// Pricing matrix

Documentation packages

Real USDC micropayments on Solana Mainnet

Stripe API

Complete SDK documentation with latest features

0.001
USDC
  • Payment Intents API
  • Webhook handling
  • Error reference

OpenAI SDK

Python SDK documentation for GPT models

0.002
USDC
  • Chat Completions API
  • Multimodal input
  • Streaming examples

Complete Bundle

All 27 packages included

0.025
USDC
  • All documentation
  • Integration patterns
  • 50% savings
// Why Solana + USDC

Network advantages

Built for micropayments at scale

⚡

400ms Finality

Transactions confirm in under a second. Your agent gets docs instantly.

💸

~$0.00025 Fees

Send $0.001 and only pay a fraction of a cent in network fees.

🔵

USDC Stablecoin

No crypto volatility. 1 USDC = $1 USD, always. Circle-backed.

💎

65,000 TPS

Solana handles massive throughput. Built for real-world scale.