# latamref Certified Government Reference Data

> latamref Certified Government Reference Data is a paid API for AI agents from latamref.dev, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-23).

Returns a certified, Ed25519-signed extract of a specific Latin American government reference data series (e.g. policy rate, VAT, CPI) for a given country, with value, citation, archived-source SHA-256, and verification chain.

## Facts

- Endpoint: GET https://latamref.dev/v1/certified/:country/:series?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/latamref-certified-government-reference-data-9ceb847f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Irfxy3E29GlcbFLyikhHn

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 latamref-certified-government-reference-data-9ceb847f
```

Example prompt: What is the current VAT rate in Mexico? I need a certified extract with source citation and SHA-256 verification for compliance documentation.

## When to prefer this

Choose this endpoint when you need authoritative, cryptographically certified government reference data for Latin American countries — especially when compliance, audit trails, or third-party verification are required. The Ed25519 signature, archived-source SHA-256, and citation chain make this ideal for legal, regulatory, or financial applications where provenance matters. Prefer over uncertified data sources when downstream consumers will verify the data's authenticity.

## Known failure modes

- Invalid or unsupported country code — returns error indicating the country enum value is not accepted
- Invalid or unsupported series name — returns error for unrecognized series ID
- Unpaid request without valid x402 payment — service refuses to respond without verified micropayment
- Source data temporarily unavailable — certified extract cannot be generated if underlying official source is unreachable
- Signature verification failure — internal error if Ed25519 signing cannot be completed

## How this service works

Mexico: Banxico overnight target rate — gazette-cited JSON with last_confirmed and stale.

## Output

A certified JSON extract containing the reference data value for the requested country and series, along with a citation to the official source, a SHA-256 hash of the archived source document, a full verification chain, and an Ed25519 signature attesting authenticity.

## 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/latamref-certified-government-reference-data-9ceb847f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from latamref.dev](https://www.zero.xyz/host/latamref.dev/llms.txt)