# srch.best Answer

> srch.best Answer is a paid API for AI agents from x402.srch.best, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Returns a structured, direct answer to a natural language question by searching and synthesizing web content

## Facts

- Endpoint: POST https://x402.srch.best/answer
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/srch-best-answer-45f94fd5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pZTyQ7_x5XWYdJQMGrXA-

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 srch-best-answer-45f94fd5 -d '<json body>'
```

Example prompt: Can you get me a structured answer to 'What is the current inflation rate in the United States?' using deep mode and return 5 results?

## When to prefer this

Choose this endpoint when you need a synthesized, structured direct answer rather than a list of raw search result URLs. It is especially well-suited for AI agents that need to resolve a factual question in a single API call without additional parsing. Use 'deep' mode for complex or research-grade questions where synthesis quality matters more than latency. Prefer this over a raw web search endpoint when your downstream task requires an opinionated, consolidated answer rather than ranked documents.

## Known failure modes

- Question too short (below 2 characters) — validation error returned
- Question exceeds 2000 character limit — request rejected
- Invalid mode value (not 'fast' or 'deep') — schema validation error
- numResults out of range (below 1 or above 10) — rejected
- Payment failure via x402 — 402 Payment Required returned
- No answer found for obscure or highly specific query — empty or low-confidence result
- Rate limiting or quota exceeded — 429 error

## How this service works

Structured answer data for agents, paid per request with x402 v2

## Output

A structured JSON object containing a synthesized direct answer to the submitted question, backed by up to the requested number of web result references. Agents receive a ready-to-use answer payload rather than raw search snippets, making it immediately usable in downstream reasoning or user-facing responses.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "mode": {
   "enum": [
    "fast",
    "deep"
   ],
   "type": "string",
   "default": "fast"
  },
  "question": {
   "type": "string",
   "maxLength": 2000,
   "minLength": 2
  },
  "numResults": {
   "type": "integer",
   "default": 5,
   "maximum": 10,
   "minimum": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/srch-best-answer-45f94fd5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.srch.best](https://www.zero.xyz/host/x402.srch.best/llms.txt)