# GEDX402 Gemma Sea Lion v4 27B Instruct (x402 Pay-per-Call)

> GEDX402 Gemma Sea Lion v4 27B Instruct (x402 Pay-per-Call) is a paid API for AI agents from ged-x402-llm.jvalamis.workers.dev, paid per call via x402, $0.04/call, status unknown (last checked 2026-09-15).

Run inference on the Gemma Sea Lion v4 27B instruction-tuned model via a pay-per-call x402 API using USDC on Base, Polygon, Arbitrum, World, or Solana — no API key required.

## Facts

- Endpoint: GET https://ged-x402-llm.jvalamis.workers.dev/v1/llm/gemma-sea-lion-v4-27b-it
- Price: $0.04/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-sea-lion-v4-27b-instruct-x402-pay-per-call-02adf5af
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UxeCfcPEVTmmbQbkNVSX_

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-sea-lion-v4-27b-instruct-x402-pay-per-call-02adf5af
```

Example prompt: Using the Gemma Sea Lion 27B model, chat with this system prompt: 'You are a helpful assistant' and user message: 'Explain the history of the Malay language in 3 paragraphs' — limit to 512 tokens and pay with USDC on Base.

## When to prefer this

Choose this endpoint when you need inference on a Southeast Asian multilingual LLM (Gemma Sea Lion v4 27B) without any API key or account registration, and you can pay per call in USDC on Base, Polygon, Arbitrum, World, or Solana via the x402 protocol. Ideal for agents that need on-demand, keyless LLM access with crypto micropayments.

## Known failure modes

- Payment not received or insufficient USDC balance — 402 Payment Required returned
- Malformed messages array (missing role or content fields) — 400 Bad Request
- max_tokens out of range (must be 1–4096) — 400 Bad Request
- Unsupported blockchain network specified for payment — payment fails
- Model timeout or Cloudflare Workers AI backend error — 500 or 503 response

## 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 identifier (@cf/aisingapore/gemma-sea-lion-v4-27b-it) and the assistant's generated response 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/aisingapore/gemma-sea-lion-v4-27b-it",
  "response": "Hello!"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gedx402-gemma-sea-lion-v4-27b-instruct-x402-pay-per-call-02adf5af/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ged-x402-llm.jvalamis.workers.dev](https://www.zero.xyz/host/ged-x402-llm.jvalamis.workers.dev/llms.txt)