# Google Scholar Search via Serper.dev (x402)

> Google Scholar Search via Serper.dev (x402) is a paid API for AI agents from agentdata-api.sander-van-aard.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-13).

Searches Google Scholar for academic papers and returns compact JSON with titles, URLs, publication info, snippets, years, and citation counts, billed per call in USDC on Base.

## Facts

- Endpoint: POST https://agentdata-api.sander-van-aard.workers.dev/web/scholar
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/google-scholar-search-via-serper-dev-x402-98948c91
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_62c45ERkihF9qPbSFoOBj

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 google-scholar-search-via-serper-dev-x402-98948c91 -d '<json body>'
```

Example prompt: Search Google Scholar for the top 5 papers on transformer attention mechanisms and give me each paper's title, year, and citation count.

## When to prefer this

Use this endpoint when you need academic paper search results with citation counts, sourced from Google Scholar, without setting up an account or API key — paying per call in USDC on Base via x402. Prefer this over general web search endpoints when the user specifically wants peer-reviewed, scholarly, or academic content with citation metadata. Choose this over direct Serper.dev integration when you need a pay-per-call model with no subscription commitment.

## Known failure modes

- Query returns zero results (valid honest response, not an error)
- Malformed query causes upstream Serper.dev failure
- Payment not received or insufficient USDC balance causes 402 rejection
- Invalid country or language code may produce unexpected results
- num parameter outside 1-10 range may be rejected or clamped

## How this service works

Google Scholar search (papers with citation counts) for AI agents at $0.004 per call, from the same Serper.dev source as /web/search. Send a query, get back compact JSON: top papers with position, title, url, publication info, snippet, year and citation count. Tune with num (1-10 results), country and language (2-letter codes). Zero results is a valid, honest answer. Pay per call in USDC on Base, no account, no API key.

## Output

Returns compact JSON with an ordered list of academic papers, each containing: position, title, URL, publication info (journal/authors), snippet, publication year, and citation count. Zero results is a valid response when no papers match the query.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object"
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/google-scholar-search-via-serper-dev-x402-98948c91/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentdata-api.sander-van-aard.workers.dev](https://www.zero.xyz/host/agentdata-api.sander-van-aard.workers.dev/llms.txt)