# GEDX402 Gemma 3 12B IT Chat

> GEDX402 Gemma 3 12B IT Chat is a paid API for AI agents from ged-x402-chat.jvalamis.workers.dev, paid per call via x402, $0.035/call, status unknown (last checked 2026-09-15).

Runs inference on Google's Gemma 3 12B instruction-tuned model via Cloudflare Workers AI, paid per-call with USDC on multiple chains using x402 protocol — no API key required.

## Facts

- Endpoint: GET https://ged-x402-chat.jvalamis.workers.dev/v1/llm/gemma-3-12b-it
- Price: $0.035/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gedx402-gemma-3-12b-it-chat-17b04afa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_A2ml8JGGvBg-zcOVAlhZN

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 gedx402-gemma-3-12b-it-chat-17b04afa
```

Example prompt: Using the Gemma 3 12B model on the x402 Workers AI endpoint (paying with USDC on Base), have it answer this in up to 500 tokens — system: 'You are a helpful assistant.', user: 'Explain the difference between proof-of-work and proof-of-stake in simple terms.'

## When to prefer this

Choose this endpoint when you need to call Gemma 3 12B IT without managing API keys, want to pay per-call via USDC micropayments using the x402 protocol, and are operating on Base, Polygon, Arbitrum, World, or Solana. Ideal for agents that need permissionless, pay-as-you-go LLM access without account setup.

## Known failure modes

- Payment not received or insufficient USDC balance — 402 Payment Required response
- Invalid message format or missing required role/content fields — 400 Bad Request
- max_tokens exceeds 4096 — validation error
- Network timeout on Cloudflare Workers edge — 503 or timeout error
- Unsupported payment chain provided — payment rejected

## How this service works

x402 workers ai. pay with usdc on base, polygon, arbitrum, world, or solana. no api keys.

## Output

A JSON object containing the model name (@cf/google/gemma-3-12b-it) and the generated assistant reply text as a string.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "messages": {
   "type": "array",
   "items": {
    "type": "object"
   }
  },
  "max_tokens": {
   "type": "integer"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "model": "@cf/google/gemma-3-12b-it",
  "response": "Hello!"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gedx402-gemma-3-12b-it-chat-17b04afa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ged-x402-chat.jvalamis.workers.dev](https://www.zero.xyz/host/ged-x402-chat.jvalamis.workers.dev/llms.txt)