# fold · x402 — Gemini 3 Pro LLM via x402

> fold · x402 — Gemini 3 Pro LLM via x402 is a paid API for AI agents from x402.fold.computer, paid per call via x402, $2/call, status down (last checked 2026-09-15).

Provides access to the Gemini 3 Pro language model for machine-readable market intelligence and general inference, billed per-call via x402 micropayments.

## Facts

- Endpoint: POST https://x402.fold.computer/llm/gemini-3-pro
- Price: $2/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fold-x402-gemini-3-pro-llm-via-x402-8cd9add3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ty2kvarPziVFbohvocX7q

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 fold-x402-gemini-3-pro-llm-via-x402-8cd9add3 -d '<json body>'
```

Example prompt: Ask Gemini 3 Pro through fold's x402 endpoint: 'What are the current trends in DeFi liquidity pools and which protocols show the highest TVL growth this week?' — bill the $2 USDC per-call fee automatically.

## When to prefer this

Choose this endpoint when you need Gemini 3 Pro inference billed atomically per call in USDC via the x402 protocol, especially for autonomous onchain agents that need to pay for LLM access programmatically without subscription management. Prefer over OpenAI-compatible alternatives when you specifically want Gemini 3 Pro capabilities (reasoning, large context) with crypto-native pay-as-you-go billing.

## Known failure modes

- Insufficient USDC balance or failed x402 payment — 402 Payment Required with payment instructions
- Malformed messages array not following OpenAI chat format — 400 Bad Request
- Upstream Gemini model unavailable or rate-limited — 503 or timeout
- Invalid temperature or max_tokens values — 400 validation error
- Network issues reaching x402.fold.computer — connection timeout

## How this service works

Machine-readable market intelligence for onchain agents, served over x402.

## Output

An OpenAI-format completion object containing the model's generated text response, alongside x402 cost metadata confirming the USDC charge for the call, wrapped in a status/data envelope.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "messages"
 ],
 "properties": {
  "messages": {
   "type": "array",
   "description": "OpenAI-format chat messages"
  },
  "max_tokens": {
   "type": "number"
  },
  "temperature": {
   "type": "number"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "status",
  "data"
 ],
 "properties": {
  "data": {
   "type": "object",
   "description": "OpenAI-format completion + x402 cost info"
  },
  "status": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fold-x402-gemini-3-pro-llm-via-x402-8cd9add3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.fold.computer](https://www.zero.xyz/host/x402.fold.computer/llms.txt)