Linkrra Synap: Open-Model LLMs

Payment pricing

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

Payment option 1

0.001 USDC
Atomic price: 1000 · Network: eip155:8453 · Asset: USDC · Scheme: exact

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "1000",
    "payTo": "0xAA0a350f6080940c138A8A50C0Fa8c8387782eb4"
  }
]

Observed health

Status

Healthy

Latest latency

301 ms

Average latency

1175 ms

HTTP status

200

Last checked

2026-11-02T06:20:52.649Z

Reachability

100% over 7 checks

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

Input schema

{
  "type": "object",
  "required": [
    "type",
    "method",
    "bodyType",
    "body"
  ],
  "additionalProperties": false,
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "POST"
      ]
    },
    "bodyType": {
      "type": "string",
      "enum": [
        "json"
      ]
    },
    "body": {
      "type": "object",
      "required": [
        "messages"
      ],
      "properties": {
        "model": {
          "type": "string",
          "enum": [
            "gpt-oss-20b"
          ],
          "description": "Optional: this endpoint always runs gpt-oss-20b."
        },
        "messages": {
          "type": "array",
          "minItems": 1,
          "description": "OpenAI-format chat history, oldest first: [{role, content}].",
          "items": {
            "type": "object",
            "required": [
              "role",
              "content"
            ],
            "properties": {
              "role": {
                "type": "string",
                "enum": [
                  "system",
                  "user",
                  "assistant",
                  "tool"
                ]
              },
              "content": {
                "description": "Text, or an array of OpenAI content parts."
              }
            }
          },
          "examples": [
            [
              {
                "role": "user",
                "content": "Write a Python function that reverses a string"
              }
            ]
          ]
        },
        "max_tokens": {
          "type": "integer",
          "minimum": 1,
          "maximum": 4096,
          "default": 4096,
          "description": "Completion token cap. The price is quoted for the prompt plus this cap."
        },
        "stream": {
          "type": "boolean",
          "default": false,
          "description": "true = stream OpenAI-format Server-Sent Events."
        }
      }
    }
  }
}

Output schema

{
  "type": "object",
  "required": [
    "type",
    "example"
  ],
  "description": "200 chat.completion (SSE if stream=true). 402 payment required or insufficient (challenge in PAYMENT-REQUIRED). 202 settlement pending. 400 invalid body or payment header. 404 model not offered. 409 payment already used. 503 no node serving the model, nothing charged. 500/502 facilitator, chain or model-server error; if inference fails after settlement the amount stays credited to the paying wallet.",
  "properties": {
    "type": {
      "type": "string"
    },
    "example": {
      "type": "object",
      "properties": {
        "model": {
          "type": "string",
          "description": "The model that answered."
        },
        "choices": {
          "type": "array",
          "description": "choices[0].message.content is the reply."
        },
        "usage": {
          "type": "object",
          "description": "Tokens billed: prompt, completion, total."
        },
        "payment": {
          "type": "object",
          "description": "USDC paid + Base tx hash; any unused amount stays credited to the payer."
        }
      }
    }
  }
}