AI Inference · x402 · early usage

x402engine — Meta's broad multimodal model with 1M context for media-rich agent workflows

by x402engine.app · discovered, not yet claimed by its owner · updated 2026-10-14

30d calls5

30d payers2

MethodPOST

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

x402engine — Meta's broad multimodal model with 1M context for media-rich agent workflows

Tags: bazaar

Call contract

Method: POST
Input: json
Output: json
Last paid call: 2026-10-14

Input example from Bazaar metadata

{
  "max_tokens": 1024,
  "messages": [
    {
      "content": "Hello",
      "role": "user"
    }
  ]
}

Output example

{
  "choices": [
    {
      "finish_reason": "stop",
      "index": 0,
      "message": {
        "content": "Hello!",
        "role": "assistant"
      }
    }
  ],
  "content": "Hello!",
  "model": "meta/muse-spark-1.1"
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/31460.json for the price and payment options.
Pay. Call GET https://x402engine.app/api/llm/muse-spark-1.1. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, eip155:4326, Solana, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.01662 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, eip155:4326, Solana
Demand: 5 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.01662	0x7dd5Be069f2d2eAd75eC7C3423B116fF043c2629	300s
exact	eip155:4326 eip155:4326	0xFAfDdbb3FC7688494971a79cc65DCa3EF82079E7	16620000000000000	0x7dd5Be069f2d2eAd75eC7C3423B116fF043c2629	300s
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.01662	Gzehfseq1k9AcHFSoV7qHmDGQx92nLMw78XXdqVWQQWa	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x7dd5Be069f2d2eAd75eC7C3423B116fF043c2629",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "16620",
    "amountUsd": 0.01662,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:4326",
    "payTo": "0x7dd5Be069f2d2eAd75eC7C3423B116fF043c2629",
    "asset": "0xFAfDdbb3FC7688494971a79cc65DCa3EF82079E7",
    "amount": "16620000000000000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "Gzehfseq1k9AcHFSoV7qHmDGQx92nLMw78XXdqVWQQWa",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "16620",
    "amountUsd": 0.01662,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON 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"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {
    "choices": [
      {
        "finish_reason": "string",
        "index": 0,
        "message": {
          "content": "string",
          "role": "string",
          "tool_calls": [
            {}
          ]
        }
      }
    ],
    "content": "string",
    "model": "string",
    "usage": {}
  },
  "type": "string"
}

Examples

curl

curl "https://x402engine.app/api/llm/muse-spark-1.1"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://x402engine.app/api/llm/muse-spark-1.1");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://x402engine.app/api/llm/muse-spark-1.1")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: x402engine.app
Endpoint: https://x402engine.app/api/llm/muse-spark-1.1
Machine-readable: /resources/31460.json