# mearef Certified Middle Eastern Government Reference Data

> mearef Certified Middle Eastern Government Reference Data is a paid API for AI agents from mearef.dev, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-21).

Returns a certified, Ed25519-signed extract of a specific government reference data series (e.g. VAT rate, corporate tax, policy rate) for a given Middle Eastern country, including value, citation, archived-source SHA-256, and a verification chain.

## Facts

- Endpoint: GET https://mearef.dev/v1/certified/:country/:series?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mearef-certified-middle-eastern-government-reference-data-49a671b0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5Hwg0EWmT9Hi9OhS-8NJN

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 mearef-certified-middle-eastern-government-reference-data-49a671b0
```

Example prompt: What is the current corporate tax rate in Saudi Arabia? I need it with a verified citation and source hash so I can include it in a compliance report.

## When to prefer this

Choose this endpoint when you need authoritative, cryptographically verifiable government reference data for Middle Eastern countries — particularly for compliance, legal, financial, or audit use cases where provenance and citation integrity matter. It is especially valuable when a downstream workflow requires proof of source (SHA-256 hash + Ed25519 signature) rather than just a raw data value. Prefer it over generic web search or unverified data feeds when the data must be auditable.

## Known failure modes

- Unsupported country code (only ae, bh, il, iq, jo, kw, om, qa, sa accepted) returns an error
- Unsupported series identifier returns an error
- Payment not provided or insufficient (endpoint refuses uncharged requests without evidence) returns a 402 Payment Required
- Archived source temporarily unavailable may delay or fail verification chain generation
- Network timeout on upstream government data source

## How this service works

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

## Output

A certified data packet containing the current value of the requested government reference series for the specified country, along with a citation pointing to the official government source, an SHA-256 hash of the archived source document, a full verification chain, and an Ed25519 digital signature authenticating the extract.

## 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/mearef-certified-middle-eastern-government-reference-data-49a671b0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mearef.dev](https://www.zero.xyz/host/mearef.dev/llms.txt)