Call OpenAI's gpt-4o via a single pay-per-call x402 endpoint — no OpenAI account or API ke

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xdaDc335482AD545296Fd7b28518A251fFCbEb9Df",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "100000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "8FVeybWnB4dYrxTuPK7WzFZNAiEcFVaDLFnKpRwVGr5s",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "100000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "max_tokens": 16,
          "messages": [
            {
              "content": "Say hi in one word.",
              "role": "user"
            }
          ]
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "example": {
          "choices": [
            {
              "finish_reason": "stop",
              "index": 0,
              "message": {
                "content": "Hi!",
                "role": "assistant"
              }
            }
          ],
          "created": 1735689600,
          "id": "chatcmpl-abc123",
          "model": "gpt-4o",
          "object": "chat.completion",
          "usage": {
            "completion_tokens": 2,
            "prompt_tokens": 11,
            "total_tokens": 13
          }
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "properties": {
                "max_tokens": {
                  "description": "Max output tokens. Optional — defaults to 2048, capped at 2048.",
                  "type": "number"
                },
                "messages": {
                  "description": "OpenAI chat messages: [{role, content}]. content is text, or parts: {type:'text',text} and (user role, max 4 per call) {type:'image_url',image_url:{url:'https://…',detail:'low'|'high'|'auto'}}. EVERY request — with or without images — must fit a 16000-token combined input budget and a 48000-char cap.",
                  "items": {
                    "properties": {
                      "content": {
                        "description": "Message text, or content parts: {type:'text',text} / {type:'image_url',image_url:{url,detail}}"
                      },
                      "role": {
                        "description": "system, user, or assistant",
                        "type": "string"
                      }
                    },
                    "required": [
                      "role",
                      "content"
                    ],
                    "type": "object"
                  },
                  "type": "array"
                },
                "temperature": {
                  "description": "Sampling temperature. Optional.",
                  "type": "number"
                },
                "top_p": {
                  "description": "Nucleus sampling. Optional.",
                  "type": "number"
                }
              },
              "required": [
                "messages"
              ],
              "type": "object"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "properties": {
                "choices": {
                  "description": "Assistant message + finish_reason.",
                  "type": "array"
                },
                "created": {
                  "description": "Unix timestamp (seconds)",
                  "type": "number"
                },
                "id": {
                  "type": "string"
                },
                "model": {
                  "type": "string"
                },
                "object": {
                  "description": "Always 'chat.completion'",
                  "type": "string"
                },
                "usage": {
                  "description": "prompt_tokens, completion_tokens, total_tokens",
                  "type": "object"
                }
              },
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://netintel.dev/openai/gpt-4o"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://netintel.dev/openai/gpt-4o");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://netintel.dev/openai/gpt-4o")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header