# x402-mainnet Protected Content Access

> x402-mainnet Protected Content Access is a paid API for AI agents from x402-mainnet.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Fetches protected content via the x402 HTTP payment protocol, requiring a micropayment of $0.001 USDC per request on mainnet

## Facts

- Endpoint: POST https://x402-mainnet.vercel.app/protected
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-mainnet-vercel-app-d271bbac
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fl3mIxdIhb-Fz3FKK_6gU

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability x402-mainnet-vercel-app-d271bbac -d '<json body>'
```

Example prompt: Access the protected content on x402-mainnet using a $0.001 USDC mainnet payment via the x402 protocol and return whatever content is behind the paywall.

## When to prefer this

Use this endpoint when you need to access content or data gated behind the x402 micropayment protocol on Ethereum mainnet and you have a funded USDC wallet. Prefer this over alternatives when you are specifically testing or using the Coinbase x402 payment-for-API-access standard on mainnet rather than testnet.

## Known failure modes

- Payment insufficient or missing — returns HTTP 402 with payment requirements
- Invalid or expired payment header — access denied
- Network or RPC issues on mainnet — request timeout or 503
- Insufficient USDC balance — payment transaction fails before content is delivered
- Malformed request body — 400 Bad Request

## How this service works

Access to protected content

## Output

The agent receives the protected content payload that is unlocked after a successful $0.001 USDC micropayment on Ethereum mainnet via the x402 HTTP payment protocol.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-mainnet-vercel-app-d271bbac/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-mainnet.vercel.app](https://www.zero.xyz/host/x402-mainnet.vercel.app/llms.txt)