# Vextorium Scholarly Search

> Vextorium Scholarly Search is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-11).

Searches 250M+ academic works in OpenAlex by keyword, returning titles, authors, institutions, year, journal, citation count, DOI, and open-access links.

## Facts

- Endpoint: POST https://api.vextorium.com/v1/scholarly-search?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vextorium-scholarly-search-026ba555
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_O7L8YAqtU5vyXwxGMz2mN

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 vextorium-scholarly-search-026ba555 -d '<json body>'
```

Example prompt: Search OpenAlex for the top 10 most-cited scholarly papers on 'transformer neural networks in natural language processing', sorted by citations, and only show me open-access ones published since 2018.

## When to prefer this

Use this endpoint when you need broad, multi-disciplinary academic literature search across 250M+ works with citation counts, DOI, and open-access links in a single call. Prefer it over web search for finding peer-reviewed research, building literature reviews, or verifying scientific claims with bibliometric data. It is particularly strong for filtering by recency and open-access availability, and for sorting by citation impact.

## Known failure modes

- Empty results if search query is too specific or uses non-standard terminology
- Null open_access field when paper is paywalled or no OA version is indexed
- Missing DOI for older or non-journal works
- Citation counts may lag real-time by weeks due to OpenAlex update cadence
- since_year filter may exclude relevant older foundational works if set too restrictively

## How this service works

Search scholarly literature across all fields in OpenAlex (250M+ works): title, authors, institutions, year, journal, citation count, DOI and open-access link; by relevance, citations or date.

## Output

Returns a list of scholarly works with OpenAlex ID, DOI, type (article/review/etc.), publication year, title, authors array, journal name, citation count, open-access PDF URL (if available), and affiliated institutions, plus the total number of matching works and the source attribution (OpenAlex CC0).

## 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": {
     "required": [
      "search"
     ],
     "properties": {
      "limit": {
       "type": "integer"
      },
      "order": {
       "enum": [
        "relevance",
        "citations",
        "recent"
       ],
       "type": "string"
      },
      "search": {
       "type": "string"
      },
      "only_open": {
       "type": "boolean"
      },
      "since_year": {
       "type": "integer"
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": [
      "object",
      "null"
     ],
     "properties": {
      "jobs": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": [
         "null",
         "object"
        ],
        "properties": {
         "id": {
          "type": [
           "null",
           "string"
          ]
         },
         "doi": {
          "type": [
           "null",
           "string"
          ]
         },
         "type": {
          "type": [
           "null",
           "string"
          ]
         },
         "year": {
          "type": [
           "null",
           "number"
          ]
         },
         "title": {
          "type": [
           "null",
           "string"
          ]
         },
         "authors": {
          "type": [
           "array",
           "null"
          ],
          "items": {
           "type": [
            "null",
            "string"
           ]
          }
         },
         "journal": {
          "type": [
           "null",
           "string"
          ]
         },
         "citations": {
          "type": [
           "null",
           "number"
          ]
         },
         "open_access": {
          "type": [
           "null",
           "string"
          ]
         },
         "institutions": {
          "type": [
         
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "jobs": [
   {
    "id": "https://openalex.org/W2899357412",
    "doi": "https://doi.org/10.1016/j.rser.2018.10.014",
    "type": "review",
    "year": 2018,
    "title": "Blockchain technology in the energy sector: A systematic review of challenges and opportunities",
    "authors": [
     "Merlinda Andoni",
     "Valentin Robu"
    ],
    "journal": "Renewable and Sustainable Energy Reviews",
    "citations": 2447,
    "open_access": "https://www.sciencedirect.com/science/article/pii/S1364032118307184/pdf",
    "institutions": [
     "Durham University",
     "Heriot-Watt University"
    ]
   },
   {
    "id": "https://openalex.org/W3123597155",
    "doi": "https://doi.org/10.1093/rof/rfw074",
    "type": "article",
    "year": 2016,
    "title": "Corporate Governance and Blockchains",
    "authors": [
     "David Yermack"
    ],
    "journal": "European Finance Review",
    "citations": 1030,
    "open_access": null,
    "institutions": [
     "Cardiff University",
     "Concordia University"
    ]
   }
  ],
  "total": 26170,
  "search": "agent payments blockchain",
  "source": "OpenAlex (CC0)"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vextorium-scholarly-search-026ba555/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)