# DataNexusAI ETS Installations Endpoint

> DataNexusAI ETS Installations Endpoint is a paid API for AI agents from api.datanexusai.org, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).

Returns EU Emissions Trading System (ETS) installation-level verified emissions data filtered by registry/country and year

## Facts

- Endpoint: GET https://api.datanexusai.org/api/v1/energy/ets/installations?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/datanexusai-ets-installations-endpoint-1bbe0c6c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9tjgC_YTCLJfPDNM3t7x4

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-ets-installations-endpoint-1bbe0c6c
```

Example prompt: Can you pull the EU ETS installation emissions data for Bulgaria (registry code BG) for 2022, showing up to 20 installations?

## When to prefer this

Choose this endpoint when you need installation-level EU ETS verified emissions data filterable by EU member state registry code and year. Prefer it over aggregated national statistics when you need granular per-installation records. Ideal for compliance analysis, ESG reporting, carbon market research, and environmental policy work requiring Eurostat-sourced EU ETS data. The $0.01 USDC micropayment via x402 makes it cost-effective for single-country lookups.

## Known failure modes

- Missing or invalid registry code returns a validation error
- Requesting a year with no available data returns empty installations array
- Exceeding rate limits or payment failure via x402 returns a 402 Payment Required response
- Invalid limit parameter type returns a schema validation error
- Registry codes not present in the EU ETS return empty or error responses

## How this service works

Public data API for SEBRA payments, PTP road accidents, EU agri-food prices, Eurostat energy (+ ETS), and trade/market analytics. Paid data endpoints use x402 (USDC micropayments). HTML docs at `/api/` are free and are intentionally omitted from this OpenAPI document so discovery scanners do not probe them as paid resources.

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

Returns a JSON object containing the registry country code, calendar year, and a list of installations each with an installation identifier and its verified emissions figure (in tonnes CO2 equivalent).

## 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",
     "required": [
      "registry"
     ],
     "properties": {
      "year": {
       "type": "integer",
       "example": 2022,
       "description": "Calendar year (default latest)"
      },
      "limit": {
       "type": "integer",
       "example": 20,
       "description": "Max installations (default 50)."
      },
      "registry": {
       "type": "string",
       "example": "BG",
       "description": "Registry/country code"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "year": 2022,
  "endpoint": "energy_ets_installations",
  "installations": [
   {
    "verified_emissions": 1200000,
    "installation_identifier": "BG-123"
   }
  ],
  "registry_code": "BG"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/datanexusai-ets-installations-endpoint-1bbe0c6c/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)