# CWTS Leiden Ranking Open Edition 2025 - University Research Intelligence

> CWTS Leiden Ranking Open Edition 2025 - University Research Intelligence is a paid API for AI agents from api.webintel-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-24).

Returns CWTS Leiden Ranking 2025 data for universities filtered by country/continent, research field, and time period, including scientific impact, collaboration, and open access indicators.

## Facts

- Endpoint: GET https://api.webintel-api.workers.dev/api/search/leiden-ranking?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cwts-leiden-ranking-open-edition-2025-university-research-intelligence-1a7974a8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_svlczlBQ5eqU66uoEfVdM

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 cwts-leiden-ranking-open-edition-2025-university-research-intelligence-1a7974a8
```

Example prompt: Show me the top 100 universities in Germany ranked by scientific impact for the 2020-2023 period in the biomedical field, using the Leiden Ranking data.

## When to prefer this

Use this endpoint when you need structured, quantitative university research rankings derived from bibliometric data (publication counts, citation impact, collaboration metrics, open access rates) for a specific country, continent, or field. It is ideal for benchmarking national or regional higher education systems, identifying research leaders, or analyzing open access adoption trends across institutions. Prefer this over general web search when you need clean, normalized, comparable ranking data rather than narrative descriptions.

## Known failure modes

- Invalid country code returns no results or error
- Unsupported field value causes validation error
- Period value outside 2009-2023 range may return error or empty result
- Invalid continent code returns empty or error response
- minPublications value not in allowed set (0,50,100,500,1000,5000,10000) may be rejected
- Indicator number out of range for the selected dimension returns error

## How this service works

CWTS Leiden Ranking Open Edition 2025 (publication-based, about 2,800 universities, OpenAlex data): for a country or continent, field and period (2006-2009 to 2020-2023), each university's rank, name, country and the indicators of the chosen dimension: scientific impact (P, top 1%), collaboration (international, industry) or open access (P(OA), PP(OA)).

## Output

A ranked list of universities matching the specified filters, each entry including the university's rank, name, country, and the quantitative indicators for the selected dimension (e.g. for 'impact': total publications P and top 1% citation share; for 'collaboration': international, industry, or geographic collaboration rates; for 'openaccess': P(OA) and PP(OA)).

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "field": {
       "type": "string",
       "description": "all (default), biomedical, life, math, physical or social"
      },
      "limit": {
       "type": "string",
       "description": "Rows to return, 1 to 1000 (default 50)"
      },
      "period": {
       "type": "string",
       "description": "Last year of the 4-year window, 2009 to 2023 (default 2023 = 2020-2023)"
      },
      "country": {
       "type": "string",
       "description": "2-letter country code, e.g. TR, DE, US (omit for world)"
      },
      "continent": {
       "type": "string",
       "description": "Instead of country: AF, AS, EU, NA, OC or SA"
      },
      "dimension": {
       "type": "string",
       "description": "impact (default), collaboration or openaccess"
      },
      "indicator": {
       "type": "string",
       "description": "Indicator set within the dimension, 1 to 5 (default 1; collaboration: 1 all, 2 international, 3 industry, 4 <100 km, 5 >5000 km)"
      },
      "minPublications": {
       "type": "string",
       "description": "0, 50, 100 (default), 500, 1000, 5000 or 10000"
      }
     }
    }
   },
   "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/cwts-leiden-ranking-open-edition-2025-university-research-intelligence-1a7974a8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
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