# KiteEndpoints.ai - Username Check API

> KiteEndpoints.ai - Username Check API is a paid API for AI agents from kite-hub-v2.vercel.app, paid per call via x402, $0.06/call, status unknown (last checked 2026-09-15).

Checks whether a username is available or already taken across social media or other platforms

## Facts

- Endpoint: POST https://kite-hub-v2.vercel.app/api/username-check
- Price: $0.06/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kiteendpoints-ai-username-check-api-a5df0026
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vwhDMI4F35i-E86s_Tfmx

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-check-api-a5df0026 -d '<json body>'
```

Example prompt: Can you check if the username 'sunrisedev42' is available?

## When to prefer this

Use this endpoint when you need a quick, pay-per-request username availability check without committing to a subscription service. Ideal for agents handling account creation flows, brand registration, or social media handle selection where on-demand lookup is preferred over bulk checking.

## Known failure modes

- Username not provided — returns validation error
- Platform not reachable — returns upstream error
- Invalid username format — returns 400-level error
- Payment not completed — returns 402 Payment Required
- Rate limit exceeded — returns 429 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 an object containing availability status and related data about the queried username, indicating whether it is taken or free on the target platform.

## 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-check-api-a5df0026/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kite-hub-v2.vercel.app](https://www.zero.xyz/host/kite-hub-v2.vercel.app/llms.txt)