# srch.best Research Search

> srch.best Research Search is a paid API for AI agents from x402.srch.best, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Returns structured academic and research paper data for a given query, with optional filters for year range, result count, and open-access status, paid per request via x402.

## Facts

- Endpoint: POST https://x402.srch.best/research
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/srch-best-research-search-a1138c94
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BZPDT0-FWKEa3a-FJYxGL

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-research-search-a1138c94 -d '<json body>'
```

Example prompt: Search for up to 10 open-access research papers on transformer architectures in natural language processing, published between 2020 and 2024, and give me the structured results.

## When to prefer this

Choose this endpoint when you need structured, queryable academic and research paper data with optional year-range and open-access filters, especially in an agentic workflow that can pay per request via x402. Prefer it over general web search when you specifically need scholarly/research literature in a machine-readable format rather than raw web pages.

## Known failure modes

- Query string too short (under 2 characters) returns validation error
- Query string exceeds 500 characters returns validation error
- Limit outside 1–20 range returns validation error
- Year values outside 1900–2100 range return validation error
- No matching papers found returns empty result set
- Payment failure via x402 returns 402 Payment Required
- Service unavailable returns 5xx error

## How this service works

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

## Output

A structured list of research paper records, each typically containing title, authors, publication year, abstract, source URL, and open-access status, up to the requested limit (max 20).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "integer",
   "default": 10,
   "maximum": 20,
   "minimum": 1
  },
  "query": {
   "type": "string",
   "maxLength": 500,
   "minLength": 2
  },
  "toYear": {
   "type": "integer",
   "maximum": 2100,
   "minimum": 1900
  },
  "fromYear": {
   "type": "integer",
   "maximum": 2100,
   "minimum": 1900
  },
  "openAccess": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/srch-best-research-search-a1138c94/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)