Api Endpoint

x402engine.app

x402engine — Thinking Machines' multimodal model for text, image, and audio understanding

Open interactive test console

Offering

Provider
x402engine.app
Method
POST
Offering type
Api Endpoint
Transport type
http
Category
Development
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://x402engine.app/api/llm/inkling
MIME type
Not provided
First seen
2026-10-16T01:53:06.460Z
Last seen
Tags
None supplied

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.01459 USDC
Atomic price: 14590 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2
14590000000000000 atomic units
Atomic price: 14590000000000000 · Network: eip155:4326 · Asset: 0xFAfDdbb3FC7688494971a79cc65DCa3EF82079E7 · Scheme: exact
Payment option 3
0.01459 USDC
Atomic price: 14590 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "14590",
    "payTo": "0x7dd5Be069f2d2eAd75eC7C3423B116fF043c2629"
  },
  {
    "scheme": "exact",
    "network": "eip155:4326",
    "asset": "0xFAfDdbb3FC7688494971a79cc65DCa3EF82079E7",
    "amount": "14590000000000000",
    "payTo": "0x7dd5Be069f2d2eAd75eC7C3423B116fF043c2629"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "14590",
    "payTo": "Gzehfseq1k9AcHFSoV7qHmDGQx92nLMw78XXdqVWQQWa"
  }
]

Observed health

Status
Healthy
Latest latency
171 ms
Average latency
224 ms
HTTP status
204
Last checked
Reachability
100% over 12 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "additionalProperties": false,
  "properties": {
    "body": {
      "additionalProperties": false,
      "properties": {
        "frequency_penalty": {
          "description": "Model-supported frequency_penalty; see /docs/llm-capabilities.md.",
          "type": "number"
        },
        "include_reasoning": {
          "description": "Model-supported include_reasoning; see /docs/llm-capabilities.md.",
          "type": "boolean"
        },
        "logit_bias": {
          "description": "Model-supported logit_bias; see /docs/llm-capabilities.md.",
          "type": "object"
        },
        "max_completion_tokens": {
          "description": "Alias for total output budget; bounded by model maxOutputTokens.",
          "type": "integer"
        },
        "max_tokens": {
          "description": "Total output budget, including reasoning. Use this or max_completion_tokens.",
          "example": 1024,
          "type": "integer"
        },
        "messages": {
          "description": "Text or model-supported multimodal messages; assistant tool calls may have null content",
          "items": {
            "additionalProperties": false,
            "anyOf": [
              {
                "required": [
                  "content"
                ]
              },
              {
                "required": [
                  "tool_calls"
                ]
              }
            ],
            "properties": {
              "annotations": {
                "items": {
                  "type": "object"
                },
                "type": "array"
              },
              "cache_control": {
                "type": "object"
              },
              "content": {
                "oneOf": [
                  {
                    "type": "string"
                  },
                  {
                    "type": "null"
                  },
                  {
                    "items": {
                      "additionalProperties": true,
                      "properties": {
                        "type": {
                          "enum": [
                            "text",
                            "image_url",
                            "input_audio"
                          ],
                          "type": "string"
                        }
                      },
                      "required": [
                        "type"
                      ],
                      "type": "object"
                    },
                    "maxItems": 100,
                    "minItems": 1,
                    "type": "array"
                  }
                ]
              },
              "name": {
                "type": "string"
              },
              "reasoning": {
                "type": "string"
              },
              "reasoning_details": {
                "items": {
                  "type": "object"
                },
                "type": "array"
              },
              "refusal": {
                "type": [
                  "string",
                  "null"
                ]
              },
              "role": {
                "enum": [
                  "system",
                  "developer",
                  "user",
                  "assistant",
                  "tool"
                ],
                "type": "string"
              },
              "tool_call_id": {
                "type": "string"
              },
              "tool_calls": {
                "items": {
                  "type": "object"
                },
                "type": "array"
              }
            },
            "required": [
              "role"
            ],
            "type": "object"
          },
          "maxItems": 100,
          "minItems": 1,
          "type": "array"
        },
        "min_p": {
          "description": "Model-supported min_p; see /docs/llm-capabilities.md.",
          "type": "number"
        },
        "presence_penalty": {
          "description": "Model-supported presence_penalty; see /docs/llm-capabilities.md.",
          "type": "number"
        },
        "reasoning": {
          "description": "Model-supported reasoning; see /docs/llm-capabilities.md.",
          "type": "object"
        },
        "reasoning_effort": {
          "description": "Model-supported reasoning_effort; see /docs/llm-capabilities.md.",
          "type": "string"
        },
        "repetition_penalty": {
          "description": "Model-supported repetition_penalty; see /docs/llm-capabilities.md.",
          "type": "number"
        },
        "response_format": {
          "description": "Model-supported response_format; see /docs/llm-capabilities.md.",
          "type": "object"
        },
        "seed": {
          "description": "Model-supported seed; see /docs/llm-capabilities.md.",
          "type": "integer"
        },
        "stop": {
          "description": "Model-supported stop; see /docs/llm-capabilities.md.",
          "oneOf": [
            {
              "type": "string"
            },
            {
              "items": {
                "type": "string"
              },
              "maxItems": 4,
              "type": "array"
            }
          ]
        },
        "stream": {
          "description": "Return live OpenAI-compatible SSE after payment settlement.",
          "type": "boolean"
        },
        "stream_options": {
          "description": "Optional include_usage boolean; usage is always requested upstream.",
          "type": "object"
        },
        "temperature": {
          "description": "Model-supported temperature; see /docs/llm-capabilities.md.",
          "type": "number"
        },
        "tool_choice": {
          "description": "Model-supported tool_choice; see /docs/llm-capabilities.md.",
          "oneOf": [
            {
              "enum": [
                "auto",
                "none",
                "required"
              ],
              "type": "string"
            },
            {
              "type": "object"
            }
          ]
        },
        "tools": {
          "description": "Client-executed function definitions; return results using role=tool and tool_call_id.",
          "items": {
            "properties": {
              "function": {
                "properties": {
                  "description": {
                    "type": "string"
                  },
                  "name": {
                    "type": "string"
                  },
                  "parameters": {
                    "type": "object"
                  },
                  "strict": {
                    "type": "boolean"
                  }
                },
                "type": "object"
              },
              "type": {
                "enum": [
                  "function"
                ],
                "type": "string"
              }
            },
            "required": [
              "function"
            ],
            "type": "object"
          },
          "type": "array"
        },
        "top_k": {
          "description": "Model-supported top_k; see /docs/llm-capabilities.md.",
          "type": "integer"
        },
        "top_p": {
          "description": "Model-supported top_p; see /docs/llm-capabilities.md.",
          "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",
    "bodyType",
    "body",
    "method"
  ],
  "type": "object"
}

Output schema

{
  "properties": {
    "example": {
      "properties": {
        "choices": {
          "items": {
            "properties": {
              "finish_reason": {
                "type": [
                  "string",
                  "null"
                ]
              },
              "index": {
                "type": "integer"
              },
              "message": {
                "properties": {
                  "content": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "role": {
                    "type": "string"
                  },
                  "tool_calls": {
                    "items": {
                      "type": "object"
                    },
                    "type": "array"
                  }
                },
                "type": "object"
              }
            },
            "type": "object"
          },
          "type": "array"
        },
        "content": {
          "description": "Convenience copy of the first assistant message's text.",
          "type": "string"
        },
        "model": {
          "type": "string"
        },
        "usage": {
          "description": "Provider token and usage accounting, when returned.",
          "type": "object"
        }
      },
      "required": [
        "choices",
        "content"
      ],
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}