# netintel.dev GPT-5.6-Luna Chat Completions (x402)

> netintel.dev GPT-5.6-Luna Chat Completions (x402) is a paid API for AI agents from netintel.dev, paid per call via x402, $0.06/call, status unknown (last checked 2026-09-14).

Runs a chat completion request through OpenAI's gpt-5.6-luna model via a pay-per-call x402 endpoint — no OpenAI account or API key required, billed at $0.06 USDC per call.

## Facts

- Endpoint: POST https://netintel.dev/openai/gpt-5-6-luna
- Price: $0.06/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/netintel-dev-gpt-5-6-luna-chat-completions-x402-01d4dc44
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rYPZ_zvVDqMa9ALw-2zy4

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 netintel-dev-gpt-5-6-luna-chat-completions-x402-01d4dc44 -d '<json body>'
```

Example prompt: Using gpt-5.6-luna, have the assistant answer this question as a senior software engineer: 'What are the key trade-offs between PostgreSQL and MongoDB for a high-write transactional workload?' — limit the response to 500 tokens.

## When to prefer this

Choose this endpoint when you need gpt-5.6-luna specifically and want to avoid setting up an OpenAI account or managing API keys — ideal for agents making infrequent or one-off LLM calls, multi-agent pipelines that pay per inference, or environments where USDC micropayments via x402 are the preferred billing mechanism. Prefer alternatives (gpt-4o-mini, gpt-5-nano) when cost is the primary concern or when gpt-5.6-luna's capability level is not required.

## Known failure modes

- Payment failure — insufficient USDC balance or x402 payment not accepted, resulting in a 402 error
- Input too long — messages array exceeding ~48000 characters total causes rejection
- Invalid message format — missing required role or content fields in messages array
- Model unavailable — gpt-5.6-luna service outage returns a 5xx error
- Rate limiting — too many concurrent requests may return 429
- Malformed request body — missing required 'messages' field returns a 400 validation error

## How this service works

Call OpenAI's gpt-5.6-luna via a single pay-per-call x402 endpoint — no OpenAI account or API key needed, pay $0.06 per request in USDC. Standard OpenAI chat.completions request/response shape, capped input and output. Search terms: OpenAI, gpt-5.6-luna, chat completion, LLM, no API key.

## Output

Returns a standard OpenAI chat.completion JSON object containing the assistant's reply in choices[0].message.content, the finish_reason, token usage breakdown (prompt_tokens, completion_tokens, total_tokens), model name, a unique completion ID, and a Unix timestamp. Output is capped at 2048 tokens.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [
      "messages"
     ],
     "properties": {
      "messages": {
       "type": "array",
       "items": {
        "type": "object",
        "required": [
         "role",
         "content"
        ],
        "properties": {
         "role": {
          "type": "string",
          "description": "system, user, or assistant"
         },
         "content": {
          "type": "string",
          "description": "Message text"
         }
        }
       },
       "description": "OpenAI chat messages: [{role:'system'|'user'|'assistant', content:string}]. Input capped ~48000 chars total."
      },
      "max_completion_tokens": {
       "type": "number",
       "description": "Max output tokens. Optional — defaults to 2048, capped at 2048."
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "id": {
       "type": "string"
      },
      "model": {
       "type": "string"
      },
      "usage": {
       "type": "object",
       "description": "prompt_tokens, completion_tokens, total_tokens"
      },
      "object": {
       "type": "string",
       "description": "Always 'chat.completion'"
      },
      "choices": {
       "type": "array",
       "description": "Assistant message + finish_reason."
      },
      "created": {
       "type": "number",
       "description": "Unix timestamp (seconds)"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "id": "chatcmpl-abc123",
  "model": "gpt-5.6-luna",
  "usage": {
   "total_tokens": 13,
   "prompt_tokens": 11,
   "completion_tokens": 2
  },
  "object": "chat.completion",
  "choices": [
   {
    "index": 0,
    "message": {
     "role": "assistant",
     "content": "Hi!"
    },
    "finish_reason": "stop"
   }
  ],
  "created": 1735689600
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/netintel-dev-gpt-5-6-luna-chat-completions-x402-01d4dc44/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from netintel.dev](https://www.zero.xyz/host/netintel.dev/llms.txt)