# Run402 Prototype Tier Subscription

> Run402 Prototype Tier Subscription is a paid API for AI agents from api.run402.com, paid per call via x402, $0.1/call, status down (last checked 2026-09-15).

Subscribes, renews, or upgrades a user to the prototype tier on Run402 for $0.10 USDC via x402 payment

## Facts

- Endpoint: POST https://api.run402.com/tiers/v1/subscribe/prototype
- Price: $0.1/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-run402-com-57fca569
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OWZlOmfianAsvUXsMtPap

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 api-run402-com-57fca569 -d '<json body>'
```

Example prompt: Sign me up for the prototype tier on Run402 — it's $0.10 USDC and I want access activated now.

## When to prefer this

Use this endpoint when the user specifically wants the prototype tier ($0.10 USDC) on Run402 and the system needs to handle subscribe, renew, or upgrade automatically without specifying intent explicitly. Prefer over the hobby tier endpoint when cost sensitivity or trial/prototyping access is the goal.

## Known failure modes

- Insufficient USDC balance — payment fails and subscription is not activated
- Invalid or missing x402 payment header — returns 402 Payment Required
- User already on a higher tier — upgrade logic may reject or require different endpoint
- Network or service error — returns 5xx with no state change
- Malformed request body — returns 400 with validation error

## Output

Returns a confirmation that the prototype tier subscription has been set, renewed, or upgraded for the user, reflecting the new active tier status.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-run402-com-57fca569/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.run402.com](https://www.zero.xyz/host/api.run402.com/llms.txt)