# KiteEndpoints.ai Username Availability Checker

> KiteEndpoints.ai Username Availability Checker is a paid API for AI agents from kite-hub-v3.vercel.app, paid per call via x402, $0.06/call, status unknown (last checked 2026-10-26).

Checks whether a given username is available or already taken across platforms

## Facts

- Endpoint: POST https://kite-hub-v3.vercel.app/api/username-check?utm_source=zero.xyz
- Price: $0.06/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-26
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kiteendpoints-ai-username-availability-checker-b4c6ede7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DYOKmfJNfNoTUzPfgcz2I

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 kiteendpoints-ai-username-availability-checker-b4c6ede7 -d '<json body>'
```

Example prompt: Can you check if the username 'techpioneer99' is available? I want to know before I try to sign up.

## When to prefer this

Use this endpoint when you need a quick, pay-per-use username availability check without setting up a dedicated integration. Useful for agents that need to validate username options on demand, especially when cost predictability per call matters (flat $0.06 USDC). Prefer this over manual browser checks or platform-specific APIs when you want a single unified endpoint.

## Known failure modes

- Username not provided — request returns an error indicating missing required field
- Platform not supported — endpoint may return an error or empty result
- Rate limiting — too many requests in a short window may result in throttling
- Network timeout — vercel deployment may occasionally be slow or unavailable
- Invalid characters in username — may return validation error

## How this service works

400+ paid API endpoints. Social media, AI, crypto, finance, weather, ecommerce, tools. Pay per request with USDC on Base chain.

## Output

Returns a result object indicating whether the queried username is available or already taken, along with any relevant platform-specific data about that username's status.

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "example": {
  "result": {
   "data": "example response"
  }
 },
 "properties": {
  "result": {
   "type": "object",
   "description": "API response data"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/kiteendpoints-ai-username-availability-checker-b4c6ede7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kite-hub-v3.vercel.app](https://www.zero.xyz/host/kite-hub-v3.vercel.app/llms.txt)