# SearchMux Answer — AI-Grounded Web Search with Citations

> SearchMux Answer — AI-Grounded Web Search with Citations is a paid API for AI agents from searchmux-agent-search.burnzzz0.chatgpt.site, paid per call via x402, $0.079/call, status unknown (last checked 2026-10-11).

Accepts a natural-language question and returns a concise AI-generated answer backed by ranked, cited web results, with provider and cache metadata.

## Facts

- Endpoint: POST https://searchmux-agent-search.burnzzz0.chatgpt.site/api/answer?utm_source=zero.xyz
- Price: $0.079/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/searchmux-answer-ai-grounded-web-search-with-citations-26bb9062
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UQTPy-DOpX-W8PLkrHivt

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 searchmux-answer-ai-grounded-web-search-with-citations-26bb9062 -d '<json body>'
```

Example prompt: Search the web and give me a concise, cited answer: what are the latest recommended daily fiber intake guidelines for adults according to current health authorities?

## When to prefer this

Choose this endpoint when you need a single-call, accountless solution that returns both a synthesized natural-language answer AND ranked cited web sources in one response. It is particularly well-suited for AI agents that need grounded, verifiable answers without managing API keys or accounts — the x402 micropayment model means any agent with USDC can call it immediately. Prefer it over raw search APIs when you want the answer synthesis done server-side, and over LLM-only answers when you need live web citations to back up the response.

## Known failure modes

- Query is too vague or ambiguous, resulting in a low-confidence or degraded answer (degraded: true)
- Provider (Tavily) upstream failure leading to empty or partial results
- Payment not attached or insufficient USDC balance, resulting in HTTP 402
- Cache miss with slow upstream response causing latency spike
- Rate limiting or quota exhaustion on the underlying provider
- Malformed POST body returns validation error

## How this service works

Five accountless x402 tools for agent search, evidence, research deltas, and passive API discovery readiness.

## Output

Returns a JSON object containing a concise AI-generated answer grounded in web results, an array of ranked results each with URL, title, snippet, and relevance score, plus metadata: whether the response was a cache hit, whether the result is degraded, the underlying provider (e.g. Tavily), a request ID, and a generation timestamp.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "integer",
   "default": 5,
   "maximum": 10,
   "minimum": 1
  },
  "query": {
   "type": "string",
   "pattern": "^\\s*\\S.*\\S\\s*$",
   "maxLength": 500,
   "minLength": 2,
   "description": "Search query; persisted only as a SHA-256 hash."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "route": "answer",
  "answer": "A concise answer grounded in the linked results.",
  "results": [
   {
    "url": "https://example.com/result",
    "score": 0.98,
    "title": "Example result",
    "snippet": "A normalized result with source URL."
   }
  ],
  "cacheHit": false,
  "degraded": false,
  "provider": "tavily",
  "requestId": "4b0f635f88504ce2aaba",
  "generatedAt": "2026-07-24T00:00:00.000Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/searchmux-answer-ai-grounded-web-search-with-citations-26bb9062/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from searchmux-agent-search.burnzzz0.chatgpt.site](https://www.zero.xyz/host/searchmux-agent-search.burnzzz0.chatgpt.site/llms.txt)