AI agents are scraping your site for free.
Let agents pay to access your content, APIs, and data. Publish in 60 seconds.
HOW IT WORKS
Three steps to get paid by AI agents
Add a pricing manifest
Create a 402.md file that defines your endpoints, prices, and payment terms. Like robots.txt, but for payments.
Agents discover your pricing
AI agents automatically find and read your 402.md file. No integration needed — it works like a sitemap.
Get paid per request
When agents access your content, they pay automatically via the x402 protocol. USDC settles directly to your wallet.
THE STANDARD
One file. At your root. Machine-readable.
402.md uses YAML frontmatter — the same format used by Jekyll, Hugo, and thousands of developer tools. Define your endpoints, set your prices, and let AI agents handle the rest.
- ✓Works with any web server or hosting platform
- ✓No SDK or integration required
- ✓Validates automatically via our tools
402.md
1---
2version: "1.0"
3owner: "0x742d35Cc6634C0532925a3b844Bc9e7595f2bD18"
4network: "base"
5
6endpoints:
7 - path: "/api/weather"
8 price: "$0.001"
9 description: "Current weather data"
10 tags: ["weather", "real-time"]
11
12 - path: "/api/forecast"
13 price: "$0.01"
14 description: "7-day hourly forecast"
15
16policies:
17 max_budget_per_session: "$1.00"
18---Tools
Everything you need to get started
Validate
Paste your 402.md file and get instant validation with error details and suggestions.
Open validator →Generate
Build a valid 402.md file step by step. Enter your wallet, add endpoints, and download.
Open generator →Registry
Browse all sites with 402.md files. Search by domain, network, price, or tags.
Browse registry →Social proof
Show visitors your site is agent-ready
[](https://402md.org/registry/yourdomain.com)Add this to your README, docs, or website to signal that AI agents can pay to access your content.