# DataNexusAI Countries List

> DataNexusAI Countries List is a paid API for AI agents from api.datanexusai.org, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-03).

Returns a paginated list of countries available in the DataNexusAI datasets, optionally filtered by dataset name.

## Facts

- Endpoint: GET https://api.datanexusai.org/api/v1/countries?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/datanexusai-countries-list-5722635c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qOFopeh9OZ7RYr59SVBhE

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 datanexusai-countries-list-5722635c
```

Example prompt: Can you pull the list of countries available in DataNexusAI's EU agri-food prices dataset? Show me the first 20.

## When to prefer this

Use this endpoint when you need to discover which countries are available in DataNexusAI's various datasets before querying dataset-specific endpoints. Ideal for building dropdowns, filters, or validating country inputs prior to making paid data calls. Prefer this over hard-coding country lists when dataset coverage may vary.

## Known failure modes

- Invalid dataset name returns empty list or 404 error
- Offset beyond total record count returns empty results
- Missing or invalid USDC micropayment (x402) results in 402 Payment Required response
- Rate limiting if too many requests are made in a short window
- Malformed query parameters (e.g. non-integer limit) return 400 Bad Request

## How this service works

Public data API for SEBRA payments, PTP road accidents, Hearthstone cards, EU agri-food prices, and trade/market analytics. Paid data endpoints use x402 (USDC micropayments). Docs and discovery endpoints are free.

Machine-readable discovery: `https://api.datanexusai.org/openapi.json`, `https://api.datanexusai.org/llms.txt`, `https://api.datanexusai.org/.well-known/x402`.

Human docs: `/docs` and `/api/`.

## Output

A paginated list of country entries available across DataNexusAI datasets, with support for filtering by a specific dataset name. Includes country identifiers/names and pagination metadata (total count, offset, limit).

## 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"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "limit": {
       "type": "integer"
      },
      "offset": {
       "type": "integer"
      },
      "dataset": {
       "type": "string",
       "description": "Optional: countries present in that dataset."
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/datanexusai-countries-list-5722635c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.datanexusai.org](https://www.zero.xyz/host/api.datanexusai.org/llms.txt)