# x402-service Grounded Answer with Live Web Search

> x402-service Grounded Answer with Live Web Search is a paid API for AI agents from x402-service.pages.dev, paid per call via x402, $0.015/call, status down (last checked 2026-09-15).

Answers a natural language question using live web search with real source citations, returning a grounded response for a flat per-call price.

## Facts

- Endpoint: POST https://x402-service.pages.dev/grounded
- Price: $0.015/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-service-grounded-answer-with-live-web-search-b463a471
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_y5a0M93t1OH0X8Xbx9HGC

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 x402-service-grounded-answer-with-live-web-search-b463a471 -d '<json body>'
```

Example prompt: What are the latest approved treatments for metastatic pancreatic cancer as of 2025? Search up to 3 web turns to give me a thorough, cited answer.

## When to prefer this

Choose this endpoint when you need a factual, up-to-date answer grounded in live web sources rather than an LLM's static training data. It is especially valuable for time-sensitive questions, recent events, or any query where source citations are needed to validate claims. Prefer this over a plain LLM call when recency and verifiability matter, and over a raw URL fetch when you want synthesized, summarized answers rather than raw page content.

## Known failure modes

- Question exceeds 2000 characters — request rejected with validation error
- max_turns out of range (below 1 or above 4) — request rejected
- Web search returns no relevant results — answer may be incomplete or indicate low confidence
- Payment not included or insufficient USDC — 402 Payment Required response
- Rate limiting or upstream search provider unavailability — 503 or timeout error

## How this service works

Grounded answer with live web search and real source citations. Flat per-call price.

## Output

A grounded natural language answer to the posed question, backed by real-time web search results, with source citations included so the agent or user can verify the claims.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "question": {
   "type": "string",
   "maxLength": 2000,
   "description": "Question to answer with live web search (max 2000 chars)"
  },
  "max_turns": {
   "type": "number",
   "maximum": 4,
   "minimum": 1,
   "description": "Max web search turns (1–4, default 2)"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-service-grounded-answer-with-live-web-search-b463a471/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-service.pages.dev](https://www.zero.xyz/host/x402-service.pages.dev/llms.txt)