# KiteEndpoints.ai - Open AI21 API

> KiteEndpoints.ai - Open AI21 API is a paid API for AI agents from kite-hub-v2.vercel.app, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-14).

Proxies a request to an AI21-based language model endpoint via KiteEndpoints.ai's mega API hub, returning AI-generated text results.

## Facts

- Endpoint: POST https://kite-hub-v2.vercel.app/api/open-ai21
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kiteendpoints-ai-open-ai21-api-e7a73832
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UH0jz7cRVZe0-fVeEz_OP

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-open-ai21-api-e7a73832 -d '<json body>'
```

Example prompt: Use KiteEndpoints' AI21 endpoint to generate a short product description for a wireless ergonomic keyboard — pay per request with USDC on Base.

## When to prefer this

Choose this endpoint when you need pay-per-request access to AI21 language models without managing your own API keys or subscriptions, and you are already using USDC on Base for micropayments in your agent workflow. Best suited for low-volume or on-demand AI text generation tasks where predictable per-call pricing is preferred over monthly subscriptions.

## Known failure modes

- Payment not received or insufficient USDC — 402 Payment Required response
- Malformed input object — API may return empty or error result
- AI21 upstream service unavailable — gateway timeout or 503 error
- Rate limiting from underlying AI21 provider — throttled response
- Invalid or missing 'result' object in request body — undefined behavior

## 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 JSON object with a 'result' field containing the AI21 model's response data, such as generated text or completion output.

## 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-open-ai21-api-e7a73832/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)