# Linkrra Synap: Google Gemma 4 26B A4B Instruct Chat Completions

> Linkrra Synap: Google Gemma 4 26B A4B Instruct Chat Completions is a paid API for AI agents from pool.linkrra.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-29).

Serves OpenAI-compatible chat completions using Google Gemma 4 26B A4B Instruct (4-bit AWQ) with 128K context, billed per call in USDC on Base via x402 with no account or API key required.

## Facts

- Endpoint: POST https://pool.linkrra.com/api/billing/x402/models/gemma-4-26b-a4b-it/chat/completions?utm_source=zero.xyz
- Price: $0.001/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-google-gemma-4-26b-a4b-instruct-chat-completions-c75dd8cc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_n21G_Wdz1HYYNSQWk7qFE

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-google-gemma-4-26b-a4b-instruct-chat-completions-c75dd8cc -d '<json body>'
```

Example prompt: Ask Gemma 4 26B on Linkrra Synap to write me a Python function that parses a JSON file and returns a list of unique email addresses — use up to 2048 tokens in the response and stream the output as it's generated.

## When to prefer this

Choose this endpoint when you need a fast, long-context (128K) open-source LLM with no account signup or API key, and you want to pay per call in USDC on Base via x402 micropayments. Ideal for agentic workflows, autonomous agents, or one-off inference tasks where subscription-based providers are impractical. Prefer this over proprietary alternatives when open-weights transparency, crypto-native billing, and OpenAI API compatibility are required simultaneously. Best suited for general chat, instruction-following, and coding tasks at 26B parameter scale.

## Known failure modes

- Insufficient USDC balance on Base — payment fails before inference begins
- max_tokens exceeds the maximum of 4096 — request rejected with validation error
- messages array is empty — minItems:1 constraint violated
- Model overload or GPU unavailability on Linkrra's pool — may return 503 or timeout
- Malformed content parts in messages — schema validation error
- x402 payment protocol misconfiguration — no response body returned

## How this service works

Linkrra Synap: Google Gemma 4 26B A4B Instruct (model "gemma-4-26b-a4b-it") - fast general model, long context. OpenAI-compatible chat completions for this one model, 128K 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

Returns an OpenAI-format chat completion object containing the model's text response, token usage counts (prompt + completion), and finish reason. When streaming is enabled, delivers incremental Server-Sent Events in OpenAI chunk format until the response is complete.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "model": {
   "enum": [
    "gemma-4-26b-a4b-it"
   ],
   "type": "string",
   "description": "Optional: this endpoint always runs gemma-4-26b-a4b-it."
  },
  "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-google-gemma-4-26b-a4b-instruct-chat-completions-c75dd8cc/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)