# Foundry Domain Availability Check

> Foundry Domain Availability Check is a paid API for AI agents from minty-sprout.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-11-01).

Checks whether a domain name is registered or available using RDAP protocol

## Facts

- Endpoint: POST https://minty-sprout.onrender.com/v1/domain-availability?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/foundry-domain-availability-check-1fd049d6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_T1eD4oHn2_MaXo2P7ckgH

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 foundry-domain-availability-check-1fd049d6 -d '<json body>'
```

Example prompt: Can you check if coolstartupname.io is available to register, or is it already taken?

## When to prefer this

Use this endpoint when you need a quick, programmatic check of whether a specific domain is registered or free, without needing full WHOIS data. It's ideal for pre-purchase screening, startup name validation, or agent workflows that need to filter domain candidates. Prefer it over full WHOIS lookups when you only need availability status and want a clean boolean result. For deeper DNS record inspection, use the sibling DNS lookup endpoint instead.

## Known failure modes

- Domain format invalid — malformed input may return an error or unexpected result
- RDAP registry unavailable for certain TLDs — some obscure TLDs may not have RDAP support, leading to inconclusive results
- Network timeout — the RDAP query may time out for slow registries
- False negatives — a domain may appear available via RDAP but actually be reserved or pending deletion at the registrar level

## How this service works

Domain availability check via RDAP: is a domain registered or free. Input: a domain.

## Output

Returns a JSON object indicating whether the domain is available (true/false), whether it is registered (true/false), the domain queried, the data source (RDAP), and an optional note — for example, 'No registration record found; confirm with a registrar before buying.' when the domain appears unregistered.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "string",
   "maxLength": 8000,
   "description": "A domain"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "note": "No registration record found; confirm with a registrar before buying.",
  "domain": "example-unregistered-name-123.com",
  "source": "RDAP",
  "available": true,
  "registered": false
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/foundry-domain-availability-check-1fd049d6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from minty-sprout.onrender.com](https://www.zero.xyz/host/minty-sprout.onrender.com/llms.txt)