# GEDX402 Fast Chat

> GEDX402 Fast Chat is a paid API for AI agents from chat.gedx402.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-23, last successful call 2026-07-17).

Runs a fast LLM chat completion using Cloudflare Workers AI (Llama 3.2 1B Instruct), paid per-call with USDC via x402 — no API key required.

## Facts

- Endpoint: GET https://chat.gedx402.com/v1/chat/fast?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Last successful call: 2026-07-17
- Success rate: 50% of calls made through Zero
- Rating: 2.0 / 5 from 1 review
- Activations on Zero: 2
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gedx402-fast-chat-10ca0875
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zXCkqEpAiFreIHynhaija

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-fast-chat-10ca0875
```

Example prompt: Can you ask the GEDX402 fast chat endpoint to explain what a merkle tree is? Use a single user message saying 'What is a merkle tree and why is it useful?' and limit the reply to 200 tokens.

## When to prefer this

Choose this endpoint when you need a fast, cheap LLM chat completion (~$0.005/call) without registering for an API key, and you can pay in USDC on Base, Polygon, Arbitrum, World, or Solana via the x402 protocol. Best for low-latency, single-turn or short multi-turn conversations where cost per call matters and crypto-native payment is acceptable. Prefer over OpenAI or Anthropic APIs when you want keyless, permissionless AI inference paid on-chain.

## Known failure modes

- Payment not received or insufficient USDC — 402 Payment Required returned
- max_tokens exceeds 4096 — validation error
- Malformed messages array (missing role or content) — 400 Bad Request
- Network timeout on Workers AI backend — 503 or timeout error
- Unsupported payment network specified — payment rejection

## How this service works

Voice-agent reply turn — low-latency chat after WebSocket ASR flux and smart-turn detection. POST messages[]; synthesize with POST /v1/tts/aura-2-en. Bundle: GET /v1/models?bundle=voice.

## Output

A JSON object containing the model identifier (e.g. '@cf/meta/llama-3.2-1b-instruct') and a 'response' string with the assistant's generated reply text.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gedx402-fast-chat-10ca0875/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from chat.gedx402.com](https://www.zero.xyz/host/chat.gedx402.com/llms.txt)