# Startup Domain & Namespace Availability Checker

> Startup Domain & Namespace Availability Checker is a paid API for AI agents from webtools.genexxis.com, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-30).

Given a company or product name, checks availability of .com/.io/.ai/.co/.dev/.app domains (via RDAP+DNS), GitHub username/org, and npm package name

## Facts

- Endpoint: GET https://webtools.genexxis.com/startup-domain-check?utm_source=zero.xyz
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/startup-domain-namespace-availability-checker-60a81c3c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DjyRgDjJr6RY5FDsW1cOb

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 startup-domain-namespace-availability-checker-60a81c3c
```

Example prompt: Can you check if 'Luminary Labs' is available as a startup name — I want to know the .com, .io, .ai, .dev, and .app domains, plus the GitHub org and npm package?

## When to prefer this

Use this endpoint when you need a one-shot availability sweep across the most critical startup namespaces (key TLDs, GitHub, npm) for a given company or product name. It's ideal for early-stage startup naming research, side-project validation, or brand squatting checks — especially when you want RDAP+DNS-level domain verification rather than just a whois lookup. Prefer this over manual domain registrar checks or separate GitHub/npm queries when you want a consolidated availability report in one API call.

## Known failure modes

- RDAP or DNS lookup timeout resulting in 'unknown' status for a domain
- Registry RDAP endpoint returning unexpected HTTP codes leading to inconclusive results
- Company name with special characters may produce unexpected slug normalization
- Rate limiting or connectivity issues with external registries
- npm or GitHub API returning unexpected responses causing 'unknown' status

## How this service works

For a company or product name: slug, availability of the .com .io .ai .co .dev .app domains (registry RDAP + DNS), GitHub user/org name and npm package name, each available, taken or unknown.

## Output

Returns a JSON object containing: a slug and hyphenated slug derived from the company name; per-domain status (available/taken/unknown) with RDAP HTTP response and DNS NS delegation details for .com, .io, .ai, .co, .dev, and .app; GitHub username status (available/taken/unknown) with HTTP status code; npm package name status (available/taken/unknown) with HTTP status code; and a summary object showing which domains are available and whether GitHub and npm are free.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "company_name"
     ],
     "properties": {
      "company_name": {
       "type": "string",
       "description": "Company or product name, e.g. Northwind Labs"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "npm": [
   {
    "http": 404,
    "name": "northwindlabs",
    "status": "available"
   }
  ],
  "slug": "northwindlabs",
  "github": [
   {
    "http": 404,
    "name": "northwindlabs",
    "status": "available"
   }
  ],
  "domains": [
   {
    "rdap": "HTTP 200 (rdap.verisign.com)",
    "dnsNs": "delegated",
    "domain": "northwindlabs.com",
    "status": "taken"
   },
   {
    "rdap": "HTTP 404 (pubapi.registry.google)",
    "dnsNs": "none",
    "domain": "northwindlabs.dev",
    "status": "available"
   }
  ],
  "summary": {
   "npmAvailable": true,
   "githubAvailable": true,
   "domainsAvailable": [
    "northwindlabs.dev"
   ]
  },
  "company_name": "Northwind Labs",
  "slugHyphenated": "northwind-labs"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/startup-domain-namespace-availability-checker-60a81c3c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from webtools.genexxis.com](https://www.zero.xyz/host/webtools.genexxis.com/llms.txt)