# Linkrra Synap: Qwen3 Coder 30B Chat Completions

> Linkrra Synap: Qwen3 Coder 30B Chat Completions is a paid API for AI agents from pool.linkrra.com, paid per call via x402, $0.001106/call, status unknown (last checked 2026-10-29).

OpenAI-compatible chat completions powered by Qwen3 Coder 30B A3B (4-bit AWQ), optimized for coding tasks, with per-call USDC payment via x402 and no API key required.

## Facts

- Endpoint: POST https://pool.linkrra.com/api/billing/x402/models/qwen3-coder-30b/chat/completions?utm_source=zero.xyz
- Price: $0.001106/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/linkrra-synap-qwen3-coder-30b-chat-completions-bf258fb2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UvBeoXinqUVWRJnM9FhpV

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability linkrra-synap-qwen3-coder-30b-chat-completions-bf258fb2 -d '<json body>'
```

Example prompt: Using Qwen3 Coder 30B on Linkrra Synap, write me a Python function that parses a JSON log file and extracts all error messages — stream the response and cap it at 1024 tokens.

## When to prefer this

Choose this endpoint when you need a coding-specialized open-weight LLM (Qwen3 Coder 30B) with no account or API key requirement, paying only per call in USDC on Base via x402. Ideal for agents that need to invoke coding assistance on-demand, especially in crypto-native or permissionless workflows. Prefer over GPT-4 or other proprietary models when cost transparency, open weights, and keyless access matter. The 32K context and streaming support make it suitable for longer coding sessions or real-time output display.

## Known failure modes

- Payment failure: x402 payment not accepted or insufficient USDC balance
- Token cap exceeded: max_tokens must be between 1 and 4096
- Empty messages array: at least one message required
- Invalid role: only system, user, assistant, tool are accepted
- Model mismatch: only qwen3-coder-30b is accepted at this endpoint
- GPU unavailability: inference pool may be busy or offline
- Streaming errors: SSE stream may drop if connection is interrupted

## How this service works

Linkrra Synap: Qwen3 Coder 30B A3B Instruct (model "qwen3-coder-30b") - coding, everyday. OpenAI-compatible chat completions for this one model, 32K context, served only on dedicated GPUs we operate, 4-bit AWQ. Pay per call in USDC on Base via x402 - no account, no API key. From $0.001 per call, usage-priced per token above that (GET /v1/models). Streaming supported. Product site: https://synap.linkrra.com

## Output

An OpenAI-format chat completion response containing the assistant's generated message (code, explanation, or answer). When streaming is enabled, returns Server-Sent Events in OpenAI streaming format. Includes token usage metadata. The model is always qwen3-coder-30b.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "model": {
   "enum": [
    "qwen3-coder-30b"
   ],
   "type": "string",
   "description": "Optional: this endpoint always runs qwen3-coder-30b."
  },
  "stream": {
   "type": "boolean",
   "default": false,
   "description": "true = stream OpenAI-format Server-Sent Events."
  },
  "messages": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "role",
     "content"
    ],
    "properties": {
     "role": {
      "enum": [
       "system",
       "user",
       "assistant",
       "tool"
      ],
      "type": "string"
     },
     "content": {
      "description": "Text, or an array of OpenAI content parts."
     }
    }
   },
   "examples": [
    [
     {
      "role": "user",
      "content": "Write a Python function that reverses a string"
     }
    ]
   ],
   "minItems": 1,
   "description": "OpenAI-format chat history, oldest first: [{role, content}]."
  },
  "max_tokens": {
   "type": "integer",
   "default": 4096,
   "maximum": 4096,
   "minimum": 1,
   "description": "Completion token cap. The price is quoted for the prompt plus this cap."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/linkrra-synap-qwen3-coder-30b-chat-completions-bf258fb2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from pool.linkrra.com](https://www.zero.xyz/host/pool.linkrra.com/llms.txt)