# KiteEndpoints.ai Username Check

> KiteEndpoints.ai Username Check is a paid API for AI agents from kite-endpoints.vercel.app, paid per call via x402, $0.06/call, status unknown (last checked 2026-10-21).

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

## Facts

- Endpoint: POST https://kite-endpoints.vercel.app/api/username-check?utm_source=zero.xyz
- Price: $0.06/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kiteendpoints-ai-username-check-4c43758f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__-ACGmbS6DnMRJAc5TBaG

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-4c43758f -d '<json body>'
```

Example prompt: Can you check if the username 'blueskywanderer' is available to register?

## When to prefer this

Use this endpoint when you need a quick, pay-per-use username availability check without managing API keys for individual social platforms. Ideal for agents that need to validate handles programmatically before account creation or brand registration workflows.

## Known failure modes

- Username not provided — returns validation error
- Platform not specified if required — may default or return error
- Rate limit exceeded — returns 429 or payment required error
- Internal lookup failure — returns 500 with generic error message
- Username contains invalid characters — returns 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 an object indicating whether the queried username is available or already taken, typically including the username checked and a boolean or status field reflecting availability.

## 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-4c43758f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kite-endpoints.vercel.app](https://www.zero.xyz/host/kite-endpoints.vercel.app/llms.txt)