Pay-per-read gated blog post delivered via x402 micropayment on Base
What it does
This endpoint serves a gated blog post titled "The Forever Spreadsheet" behind an x402 micropayment wall. It is part of a simple API built by artlu99 that provides protected blog posts in exchange for one-time x402 payments. The endpoint accepts a POST request and, upon receiving a valid X-PAYMENT header with a USDC payment on the Base network, returns the post content as HTML.
The payment scheme is "exact" and requires up to 1,000,000 units of USDC (the asset at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base, which uses 6 decimals — so this amounts to $1.00 USD). The x402 challenge is version 1 and the payment timeout is 300 seconds. The payTo address is 0x094f1608960A3cb06346cFd55B10b3cEc4f72c78.
The project is open source under the MIT license, with source code available on GitHub. There is no OpenAPI spec, no dedicated documentation page, and no additional endpoints beyond a health check and a cheaper static test endpoint at /paid ($0.001). This is a minimal demonstration of x402-gated content delivery rather than a full-featured API.
Capabilities
Use cases
- —Agents purchasing and reading gated blog content programmatically
- —Demonstrating x402 micropayment flows for content delivery
- —Testing x402 client implementations against a live endpoint
- —Paying to access a specific blog post ("The Forever Spreadsheet") via USDC on Base
Fit
Best for
- —Developers testing x402 payment integrations
- —AI agents that need to purchase and consume gated written content
- —Exploring micropayment-based content monetization patterns
Not for
- —Bulk content retrieval or scraping (single post only)
- —Users needing free or subscription-based access to content
- —Production applications requiring high-availability SLA or rich API documentation
Quick start
# POST with x402 payment header to retrieve the gated blog post
curl -X POST https://x402.artlu.xyz/gated/the-forever-spreadsheet \
-H "X-PAYMENT: <your-x402-payment-token>"Endpoint
Quality
The x402 challenge is live and well-formed, confirming the endpoint works. However, there is no OpenAPI spec, no documentation beyond a brief landing page, no example request/response bodies, and the endpoint serves a single static blog post. This is a minimal demo project with sparse metadata.
Warnings
- —No OpenAPI or formal API documentation available
- —No example response body available — output is described only as text/html
- —Single-post endpoint with no broader API surface
- —No SLA or uptime guarantees; this appears to be a personal demo project
Citations
- —The endpoint costs $1.00 in USDC on Base (maxAmountRequired 1000000, 6-decimal USDC)https://x402.artlu.xyz
- —A simple API that provides protected blog posts in return for a one-time x402 micropaymenthttps://x402.artlu.xyz
- —Source code is available on GitHub under MIT licensehttps://github.com/artlu99/x402-blogposts-gate
- —There is also a static test endpoint at /paid for $0.001https://x402.artlu.xyz