# Maxwell x402 – Czech National Open Data Portal Search

> Maxwell x402 – Czech National Open Data Portal Search is a paid API for AI agents from api.maxwellinternational.ai, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).

Search or fetch datasets from Czechia's national open data portal (data.gov.cz) by keyword or dataset ID, returning title, publisher, modification date, file count, and official link.

## Facts

- Endpoint: GET https://api.maxwellinternational.ai/v1/gov/cz/open-data?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/maxwell-x402-czech-national-open-data-portal-search-70ac3327
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zH74msuJV_pWo29-RojTU

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 maxwell-x402-czech-national-open-data-portal-search-70ac3327
```

Example prompt: Search the Czech national open data portal for datasets about water quality — I want the titles, publishing organizations, and links to the official pages.

## When to prefer this

Use this endpoint when you need to discover or retrieve metadata for publicly available Czech government datasets from data.gov.cz. Prefer this over generic web search when you want structured, machine-readable dataset metadata including publisher, file counts, and direct portal links. Use the sibling Austria, Germany, EU, or UK endpoints for those respective portals.

## Known failure modes

- 404 response when no cached result exists (not charged); fresh fetch takes up to one minute
- Empty result set if no datasets match the keyword
- Dataset ID not found returns an error or empty response
- Portal temporarily unavailable causing fetch failure
- Query timeout if data.gov.cz is slow to respond

## How this service works

Search the national open data portal of Czechia (data.gov.cz) by keyword, or fetch one dataset by id: title, publishing organization, last modified date where the portal gives one, number of files and the official link, under the portal's licence terms (a dataset's own licence is on its official page). Uncached: 404, not charged, fetched within about a minute.

## Output

Returns a JSON object with ok status, a list of dataset items each containing an ID, title, last modified date (if available), source URL, publishing organization name, and resource file count, plus overall total count, the query used, data source attribution, licence information, and fetch timestamp.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    },
    "queryParams": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "sku": "gov.cz.open_data",
  "count": 10,
  "items": [
   {
    "id": "00020699/a6dd7826d86120a6ecf42a902fa82aca",
    "title": "Merici sit automatickych meteorologickych, klimatologickych a srazkomernych s...",
    "modified": null,
    "sourceUrl": "https://data.gov.cz/datova-sada?iri=https%3A%2F%2Fdata.gov.cz%2Fzdroj%2Fdatov...",
    "organization": "Cesky hydrometeorologicky ustav",
    "resourceCount": 4
   }
  ],
  "query": "klima",
  "family": "open_data",
  "source": "Narodni katalog otevrenych dat (data.gov.cz)",
  "country": "Czechia",
  "licence": {
   "url": "https://data.gov.cz/podminky-uziti/",
   "name": "Each dataset states its own terms of use (podminky uziti), reported per item"
  },
  "fetchedAt": "2026-09-29T13:46:16.484Z",
  "sourceUrl": "https://data.gov.cz/",
  "totalCount": 12
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/maxwell-x402-czech-national-open-data-portal-search-70ac3327/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.maxwellinternational.ai](https://www.zero.xyz/host/api.maxwellinternational.ai/llms.txt)