# Blockbuster.ai ChatGPT-4o Endpoint

> Blockbuster.ai ChatGPT-4o Endpoint is a paid API for AI agents from blockbuster-ai.vercel.app, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-13).

Proxies a query to GPT-4o via Blockbuster.ai's multi-API hub, returning an AI-generated response for a given text input with x402 micropayment on Base chain.

## Facts

- Endpoint: POST https://blockbuster-ai.vercel.app/api/chatgpt-4o
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockbuster-ai-chatgpt-4o-endpoint-11b5fefa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VVSUrJqy3neOIPvO3x10V

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 blockbuster-ai-chatgpt-4o-endpoint-11b5fefa -d '<json body>'
```

Example prompt: Ask ChatGPT-4o through Blockbuster.ai to explain the difference between supervised and unsupervised machine learning in simple terms — just send the query and get the response.

## When to prefer this

Choose this endpoint when you need on-demand GPT-4o text generation without an OpenAI subscription, and you want to pay per call using USDC micropayments on Base chain via x402 protocol. It's suitable for agents that need occasional AI inference without managing API keys or monthly subscriptions.

## Known failure modes

- Payment not received or insufficient USDC balance — 402 Payment Required
- Malformed or missing 'query' field — 400 Bad Request
- OpenAI upstream service unavailable — 503 or 500 error
- Rate limit exceeded on underlying OpenAI API — 429 Too Many Requests
- Empty or null query string yields unhelpful or error response

## How this service works

115+ premium paid endpoints: Social Media, AI/ML, E-commerce, Finance, Data Intelligence, Media, Tools. x402 micropayments on Base chain.

## Output

Returns a JSON object with a 'success' boolean and a 'data' object containing the GPT-4o model's response to the submitted query string.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "description": "Input parameter for the API call"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "type": "object"
  },
  "success": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockbuster-ai-chatgpt-4o-endpoint-11b5fefa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from blockbuster-ai.vercel.app](https://www.zero.xyz/host/blockbuster-ai.vercel.app/llms.txt)