# EuroRef Certified European Government Reference Data

> EuroRef Certified European Government Reference Data is a paid API for AI agents from euroref.dev, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-19).

Returns a cryptographically certified extract of a specific European government reference data series (e.g. VAT, policy rate, CPI) for a given country, including value, citation, archived-source SHA-256, and Ed25519 signature.

## Facts

- Endpoint: GET https://euroref.dev/v1/certified/:country/:series?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/euroref-certified-european-government-reference-data-baa27ce6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xZ90vFTCQjwcEWnIyFBBg

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 euroref-certified-european-government-reference-data-baa27ce6
```

Example prompt: Can you get me the certified current VAT rate for Germany from EuroRef — I need the value plus the archived source hash and signature so I can prove it in an audit?

## When to prefer this

Choose this endpoint when you need not just a reference value but cryptographic proof of its provenance — i.e., when an auditor, regulator, or automated compliance workflow requires a verifiable chain from official source to delivered value. Prefer it over plain data APIs when Ed25519 signing, SHA-256 source archiving, or citation traceability are required. It covers a broad set of European jurisdictions and series types (VAT, CPI, corporate tax, policy rates, etc.) in a single certified call.

## Known failure modes

- Unsupported country/series combination — returns an error indicating the pair is not available
- Payment not confirmed — refuses to return data without a valid x402 charge
- Network or availability error — upstream government source temporarily inaccessible
- Invalid country or series enum value — returns a validation error
- Signature verification failure — internal integrity error returned to caller

## How this service works

Certified extract: value + citation + archived-source sha256 + verification chain, Ed25519-signed. Refuses uncharged without evidence

## Output

A JSON object containing the current value of the requested reference series for the specified country, a citation to the official source, an SHA-256 hash of the archived source document, a full verification chain, and an Ed25519 cryptographic signature attesting to the extract's authenticity. Returns an error if the requested combination is not supported or payment is not confirmed.

## 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": {},
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/euroref-certified-european-government-reference-data-baa27ce6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from euroref.dev](https://www.zero.xyz/host/euroref.dev/llms.txt)