Api Endpoint

BlockRun.AI

Access 78 frontier LLMs with OpenAI-compatible API.

Open interactive test console

Offering

Provider
BlockRun.AI
Method
POST
Offering type
Api Endpoint
Transport type
http
Category
Creative
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://arc.blockrun.ai/api/v1/chat/completions
MIME type
application/json
First seen
2026-10-16T01:50:03.601Z
Last seen
Tags
X402, AI, blockchain, ai-&-ml

Payment pricing

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

Payment option 1
8913 atomic units
Atomic price: 8913 · Network: eip155:5042 · Asset: 0x3600000000000000000000000000000000000000 · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:5042",
    "asset": "0x3600000000000000000000000000000000000000",
    "amount": "8913",
    "payTo": "0x634D274e67DafaF76C54153aa113906a606e1E0B"
  }
]

Observed health

Status
Healthy
Latest latency
69 ms
Average latency
179 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

{
  "body": {
    "type": "object",
    "required": [
      "model",
      "messages"
    ],
    "properties": {
      "model": {
        "enum": [
          "openai/gpt-6-astra",
          "openai/gpt-6-sol",
          "openai/gpt-6-luna",
          "openai/gpt-5.6-sol",
          "openai/gpt-5.6-terra",
          "openai/gpt-5.6-luna",
          "openai/gpt-5.6-sol-pro",
          "openai/gpt-5.6-terra-pro",
          "openai/gpt-5.6-luna-pro",
          "openai/gpt-5.5",
          "openai/gpt-5.5-pro",
          "openai/chat-latest",
          "openai/gpt-5.4",
          "openai/gpt-5.4-pro",
          "openai/gpt-5.1",
          "openai/gpt-5.2",
          "openai/gpt-5.4-mini",
          "openai/gpt-5-mini",
          "openai/gpt-5.4-nano",
          "openai/gpt-5.2-pro",
          "openai/gpt-5.3-codex",
          "openai/gpt-4.1",
          "openai/gpt-4.1-mini",
          "openai/gpt-4.1-nano",
          "openai/gpt-4o",
          "openai/gpt-4o-mini",
          "openai/o1",
          "openai/o3",
          "openai/o3-mini",
          "openai/o4-mini",
          "anthropic/claude-haiku-4.5",
          "anthropic/claude-sonnet-5.5",
          "anthropic/claude-sonnet-5",
          "anthropic/claude-sonnet-4.6",
          "anthropic/claude-sonnet-4.5",
          "anthropic/claude-opus-4.5",
          "anthropic/claude-opus-4.7",
          "anthropic/claude-fable-5.1",
          "anthropic/claude-fable-5",
          "anthropic/claude-opus-4.8",
          "anthropic/claude-opus-5",
          "anthropic/claude-opus-5.5",
          "google/gemini-3.1-pro",
          "google/gemini-3-flash-preview",
          "google/gemini-3.8-flash",
          "google/gemini-3.6-flash",
          "google/gemini-3.5-flash",
          "google/gemini-2.5-pro",
          "google/gemini-2.5-flash",
          "google/gemini-3.5-flash-lite",
          "google/gemini-3.1-flash-lite",
          "google/gemini-2.5-flash-lite",
          "deepseek/deepseek-v4-flash-vision-exp",
          "deepseek/deepseek-v4-pro",
          "deepseek/deepseek-chat",
          "deepseek/deepseek-reasoner",
          "moonshot/kimi-k3",
          "zai/glm-5.3",
          "zai/glm-5.3-flash",
          "zai/glm-5.2",
          "zai/glm-5.1",
          "zai/glm-5",
          "zai/glm-5-turbo",
          "xai/grok-4.3",
          "xai/grok-build-0.1",
          "xai/grok-4.7",
          "xai/grok-4.6",
          "xai/grok-4.5",
          "minimax/minimax-m2.7",
          "minimax/minimax-m3",
          "qwen/qwen3.7-max",
          "qwen/qwen3.7-plus",
          "qwen/qwen3.7-flash",
          "qwen/qwen3.8-flash",
          "xiaomi/mimo-v2.5",
          "xiaomi/mimo-v2.5-pro",
          "nvidia/nemotron-3-nano-omni-30b-a3b-reasoning",
          "nvidia/nemotron-3.5-lightning",
          "nvidia/llama-3.2-11b-vision",
          "nvidia/nemotron-3-ultra-550b",
          "cohere/north-mini-code",
          "poolside/laguna-xs-2.1"
        ],
        "type": "string",
        "example": "openai/gpt-4.1-mini",
        "description": "Model ID to use for completion"
      },
      "stream": {
        "type": "boolean",
        "description": "Enable streaming responses"
      },
      "messages": {
        "type": "array",
        "items": {
          "type": "object",
          "required": [
            "role",
            "content"
          ],
          "properties": {
            "role": {
              "enum": [
                "system",
                "user",
                "assistant"
              ],
              "type": "string"
            },
            "content": {
              "type": "string"
            }
          }
        },
        "example": [
          {
            "role": "user",
            "content": "What is x402?"
          }
        ],
        "description": "Array of chat messages"
      },
      "max_tokens": {
        "type": "integer",
        "maximum": 128000,
        "minimum": 1,
        "description": "Maximum tokens to generate"
      },
      "temperature": {
        "type": "number",
        "maximum": 2,
        "minimum": 0,
        "description": "Sampling temperature (0-2)"
      }
    }
  },
  "type": "http",
  "method": "POST",
  "bodyType": "json"
}

Output schema

{
  "type": "object",
  "properties": {
    "id": {
      "type": "string"
    },
    "model": {
      "type": "string"
    },
    "usage": {
      "type": "object",
      "properties": {
        "total_tokens": {
          "type": "integer"
        },
        "prompt_tokens": {
          "type": "integer"
        },
        "completion_tokens": {
          "type": "integer"
        }
      }
    },
    "object": {
      "type": "string",
      "example": "chat.completion"
    },
    "choices": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "index": {
            "type": "integer"
          },
          "message": {
            "type": "object",
            "properties": {
              "role": {
                "type": "string"
              },
              "content": {
                "type": "string"
              }
            }
          },
          "finish_reason": {
            "type": "string"
          }
        }
      }
    },
    "created": {
      "type": "integer"
    }
  }
}