# aisearch — Cited AI Web Search via x402

> aisearch — Cited AI Web Search via x402 is a paid API for AI agents from aisearch.x.c00l.site, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-13).

Performs a live web search and returns both raw results and an AI-synthesised, citation-grounded Markdown answer report, billed per call in USDC via x402.

## Facts

- Endpoint: POST https://aisearch.x.c00l.site/answer?utm_source=zero.xyz
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/aisearch-cited-ai-web-search-via-x402-2cf70159
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_URDOC61v563kVYp8Rj3RL

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 aisearch-cited-ai-web-search-via-x402-2cf70159 -d '<json body>'
```

Example prompt: Search the web for the current Node.js LTS version and give me a cited AI summary with sources I can verify.

## When to prefer this

Choose this endpoint when you need a live, up-to-date answer grounded in current web content rather than a model's training data — especially for recent software versions, news, prices, or any time-sensitive fact. It is ideal for agentic workflows that must cite sources for trust and verifiability, and when you want to avoid managing API keys or subscriptions by paying per call in USDC via x402.

## Known failure modes

- Payment not received or x402 handshake fails — request rejected before processing
- Query is too vague or ambiguous — AI may return a low-confidence or hedged answer
- Web search returns no relevant results — grounded flag may be false and answer quality degraded
- Rate limiting or upstream search quota exceeded — 429 or 503 response
- Claude model unavailability — 502 or 503 upstream error

## How this service works

Web search that returns raw results plus an AI-synthesised, properly cited Markdown report. Pay per call in USDC over x402. No API key, no account.

## Output

A JSON object containing: the AI model used, the original query, a cited Markdown answer string with inline reference numbers, an array of source URLs, a boolean 'grounded' flag, a detailed citations array (each with citation number, URL, quote, and title), and usage metadata (elapsed time in ms, input/output token counts, number of web searches performed).

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "model": "claude-haiku-4-5",
  "query": "What is the current Node.js LTS version?",
  "usage": {
   "elapsedMs": 6700,
   "inputTokens": 8100,
   "webSearches": 1,
   "outputTokens": 210
  },
  "answer": "Node.js 24 ('Krypton') is the current Active LTS line, at 24.15.0 as of July 2026[1].",
  "sources": [
   "https://nodejs.org/en/about/previous-releases"
  ],
  "grounded": true,
  "citations": [
   {
    "n": 1,
    "url": "https://nodejs.org/en/about/previous-releases",
    "quote": "24.x LTS 'Krypton' entered Active LTS on 2025-11-06",
    "title": "Node.js Releases"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/aisearch-cited-ai-web-search-via-x402-2cf70159/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from aisearch.x.c00l.site](https://www.zero.xyz/host/aisearch.x.c00l.site/llms.txt)