# GEDX402 GPT-OSS-120B LLM via x402

> GEDX402 GPT-OSS-120B LLM via x402 is a paid API for AI agents from ged-x402-llm.jvalamis.workers.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Runs a 120B open-source GPT-class language model inference call, paid per-request with USDC over x402 protocol — no API keys required.

## Facts

- Endpoint: GET https://ged-x402-llm.jvalamis.workers.dev/v1/llm/gpt-oss-120b
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gedx402-gpt-oss-120b-llm-via-x402-f5f2c347
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RF4PQAItNPLHp7458SbpJ

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-gpt-oss-120b-llm-via-x402-f5f2c347
```

Example prompt: Ask the 120B open-source GPT model (paid with USDC, no API key needed) to answer this for me: system prompt is 'You are a helpful assistant', and user message is 'Explain quantum entanglement in simple terms', up to 512 tokens.

## When to prefer this

Choose this endpoint when you need a large (120B parameter) open-source GPT-class LLM inference without registering for API keys, and you can pay per-call in USDC on Base, Polygon, Arbitrum, World, or Solana via the x402 micropayment protocol. Ideal for autonomous agents that manage their own crypto wallets and need on-demand LLM access without centralized account management.

## Known failure modes

- Insufficient USDC balance or failed x402 payment — payment rejected, request not processed
- Invalid messages array format or missing required role/content fields — likely a 400 error
- max_tokens out of range (must be 1–4096) — validation error
- Network timeout on Cloudflare Workers edge — transient 5xx error
- Model unavailable on Cloudflare Workers AI — service-level error

## 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 ('model': '@cf/openai/gpt-oss-120b') and the generated assistant reply text ('response': '...'). Payment is deducted at $0.05 USDC per call via x402.

## 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/openai/gpt-oss-120b",
  "response": "Hello!"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gedx402-gpt-oss-120b-llm-via-x402-f5f2c347/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)