# serp402 Google Gemini API

> serp402 Google Gemini API is a paid API for AI agents from serp402.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-31).

Proxies queries to Google Gemini AI and returns structured JSON responses, supporting multi-turn conversations via a continuation token

## Facts

- Endpoint: POST https://serp402.com/api/v1/google-gemini?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/serp402-google-gemini-api-57b32c13
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nzTJa4o38ZZZXuD8Ct46_

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 serp402-google-gemini-api-57b32c13 -d '<json body>'
```

Example prompt: Ask Google Gemini: 'What are the main differences between transformer and diffusion model architectures?' and give me the structured JSON response — no API key needed, just pay per call.

## When to prefer this

Choose this endpoint when you need Gemini AI responses without managing a Google API key or subscription, want pay-per-call pricing via USDC, need structured JSON output for downstream processing, or are building an agent that requires multi-turn Gemini conversations with minimal setup overhead.

## Known failure modes

- Invalid or malformed query returns an error response
- Expired or invalid subsequent_request_token breaks conversation continuity
- Payment failure (insufficient USDC balance) blocks the request
- Upstream Gemini service unavailability causes request failure
- Empty query string returns validation error

## How this service works

Google Gemini: Google Gemini results, returned as JSON. Structured JSON, USD 0.05 per call in USDC — no API key, no account, no subscription, no minimum. Not affiliated with, endorsed by or an official channel of any of the services the results come from. All trademarks and copyright remain the property of their respective owners.

## Output

A structured JSON object containing Google Gemini's AI-generated response to the query, along with a subsequent_request_token that can be passed with a new query to continue the conversation in context.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "q": {
   "type": "string"
  },
  "subsequent_request_token": {
   "type": "string",
   "description": "token used to continue a Google Gemini conversation. Pass this token with a new q to send a follow-up prompt that includes the previous prompts and answers as…"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/serp402-google-gemini-api-57b32c13/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from serp402.com](https://www.zero.xyz/host/serp402.com/llms.txt)