# Saylor Innovations Data Desk – Poland FX & Gold Rates

> Saylor Innovations Data Desk – Poland FX & Gold Rates is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-16).

Returns the NBP daily mid-rate for Polish zloty (PLN) exchange rates against USD, EUR, GBP and other currencies, plus the current gold price in PLN per gram, with optional recent history.

## Facts

- Endpoint: GET https://saylorinnovations.com/api/fx/poland?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-data-desk-poland-fx-gold-rates-95df6d2d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1TEXLeARzu6gmlilVcbfk

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 saylor-innovations-data-desk-poland-fx-gold-rates-95df6d2d
```

Example prompt: What's the current USD to Polish zloty exchange rate according to the NBP mid-rate, and how has it trended over the last 14 days?

## When to prefer this

Choose this endpoint when you need the official National Bank of Poland (NBP) mid-rate for PLN exchange rates or the NBP gold price in PLN per gram, particularly for Polish financial reporting, compliance, or accounting contexts that require the official central-bank rate rather than market spot prices. It is especially useful when you also need recent historical rate data in a single call.

## Known failure modes

- Invalid or unsupported currency code returns an error or empty result
- Days parameter outside 1–60 range may be rejected or clamped
- NBP data unavailable on weekends/holidays may return the last published rate or an error
- Network timeout if the upstream NBP API is slow or down
- Missing required payment header returns 402 Payment Required

## How this service works

Polish zloty exchange rate and gold price - NBP daily mid rate for USD, EUR, GBP and others with recent history, plus gold per gram

## Output

A JSON object containing the requested currency code and name, the latest NBP mid-rate value, the day-over-day percentage change, an array of historical rates for the requested period (default 10 days, up to 60), the current gold price in PLN per gram, the data source attribution, and any contextual notes about the data.

## 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",
      "POST",
      "PUT",
      "PATCH",
      "DELETE",
      "HEAD"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "days": {
       "type": "string",
       "description": "optional recent days 1-60 (default 10)"
      },
      "currency": {
       "type": "string",
       "description": "optional three-letter currency code, default USD"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "currency",
      "latest"
     ],
     "properties": {
      "note": {
       "type": "string",
       "description": "Caveat or context for reading the result"
      },
      "rates": {
       "type": "array",
       "description": "Rates keyed by code"
      },
      "latest": {
       "type": "object",
       "description": "Most recent value or version"
      },
      "source": {
       "type": "string",
       "description": "Data source the values come from"
      },
      "currency": {
       "type": "string",
       "description": "Currency code"
      },
      "currency_name": {
       "type": [
        "string",
        "null"
       ],
       "description": "Currency name"
      },
      "change_vs_prior_day_pct": {
       "type": [
        "number",
        "null"
       ],
       "description": "Change vs prior day, as a percentage"
      },
      "gold_price_pln_per_gram": {
       "type": [
        "object",
        "null"
       ],
       "description": "Gold price pln per gram"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-data-desk-poland-fx-gold-rates-95df6d2d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)