# StableDomains Domain Registration

> StableDomains Domain Registration is a paid API for AI agents from stabledomains.dev, paid per call via x402, $200/call, status unknown (last checked 2026-09-15).

Register a new domain name via crypto micropayment (x402/MPP) authentication

## Facts

- Endpoint: POST https://stabledomains.dev/api/register
- Price: $200/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stabledomains-60d98035
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LSMxrrTGUgUpwzVlG6jFv

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 stabledomains-60d98035 -d '<json body>'
```

Example prompt: Register the domain 'morningbloom.coffee' for 2 years on StableDomains — pay with my connected wallet.

## When to prefer this

Use this endpoint when an agent needs to programmatically register a new domain name and is operating in a crypto-native or agentic context where x402 micropayment authentication is available. Prefer over traditional registrar APIs when the workflow is wallet-based or requires trustless payment settlement without credit card billing.

## Known failure modes

- Domain already registered — returns conflict or unavailable error
- Insufficient payment or payment authentication failure via x402/MPP
- Invalid domain name format or unsupported TLD
- Wallet authentication failure or missing x402 payment header
- Domain name contains prohibited characters or reserved strings
- Registration duration out of allowed range

## How this service works

Register a domain. Auth: x402/MPP.

## Output

Returns confirmation of domain registration including the registered domain name, registration start and expiry dates, transaction/payment details, and registrar confirmation record.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "domain": {
   "type": "string",
   "description": "Full domain (e.g. \"example.com\"). Supported TLDs (28): .ai, .app, .biz, .cloud, .co, .com, .dev, .email, .info, .io, .link, .live, .me, .mobi, .name, .net, .online, .org, .page, .pro, .shop, .site, .store, .studio, .tech, .tv, .uk, .xyz."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stabledomains-60d98035/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from stabledomains.dev](https://www.zero.xyz/host/stabledomains.dev/llms.txt)