# Services from fx-reference-rates.regnotes.workers.dev on Zero

> fx-reference-rates.regnotes.workers.dev serves 12 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/fx-reference-rates.regnotes.workers.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/fx-reference-rates.regnotes.workers.dev/health.json

## Services

- [FX Reference Rates API – Currency Conversion](https://www.zero.xyz/c/fx-reference-rates-api-currency-conversion-03037fa6/llms.txt): $0.001/call via x402. Converts a monetary amount between two currencies using ECB official reference rates, either at today's rate or a specified historical date.
- [FX Reference Rates Timeseries API](https://www.zero.xyz/c/fx-reference-rates-timeseries-api-723fed53/llms.txt): $0.003/call via x402. Returns a daily exchange rate time series for a currency pair over a date range (up to 366 days), including per-day rates plus summary stats (min, max, mean, change%).
- [FX Reference Rates API – Historical Rates](https://www.zero.xyz/c/fx-reference-rates-api-historical-rates-8c5a9ee4/llms.txt): $0.002/call via x402. Returns ECB foreign exchange reference rates for a specific historical date, with any base currency, falling back to the nearest prior publication day if the requested date had no ECB publication.
- [Cloud GPU Price Comparison API](https://www.zero.xyz/c/cloud-gpu-price-comparison-api-0d4b9da1/llms.txt): $0.005/call via x402. Returns ranked, filtered list of GPU/AI accelerator instance hourly prices across AWS and Azure, sorted by USD per GPU-hour.
- [FX Reference Rates API – Full Dataset CSV Bulk Download](https://www.zero.xyz/c/fx-reference-rates-api-full-dataset-csv-bulk-download-2b3a1d8c/llms.txt): $0.02/call via x402. Downloads the complete historical ECB foreign exchange reference rate dataset as a CSV file, with one row per publication day and one column per currency, in any supported base currency.
- [FX Reference Rates API – Country Macroeconomic Indicators](https://www.zero.xyz/c/fx-reference-rates-api-country-macroeconomic-indicators-6846aa1e/llms.txt): $0.02/call via x402. Returns World Bank macroeconomic indicators (GDP, inflation, unemployment, debt, population, and more) for a specified country, covering ~217 economies.
- [FX Reference Rates API – Country Macroeconomic Indicator Ranking](https://www.zero.xyz/c/fx-reference-rates-api-country-macroeconomic-indicator-ranking-c000ead8/llms.txt): $0.02/call via x402. Ranks ~217 countries by a chosen macroeconomic indicator (GDP, inflation, unemployment, etc.) from World Bank data, with optional filters by year, income group, region, and result count.
- [World Bank Macroeconomic Indicators by Country](https://www.zero.xyz/c/world-bank-macroeconomic-indicators-by-country-3a764ac0/llms.txt): $0.01/call via x402. Retrieves historical macroeconomic indicator time series (GDP, inflation, unemployment, etc.) for up to 217 economies from World Bank World Development Indicators data.
- [LLM API Pricing Lookup](https://www.zero.xyz/c/llm-api-pricing-lookup-5c22287f/llms.txt): $0.005/call via x402. Returns USD pricing per 1M input, output, and cached-input tokens plus context window size for ~3,300 LLM models across providers like OpenAI, Anthropic, Google, Azure, Bedrock, and more.
- [FX Reference Rates API – Latest Rates](https://www.zero.xyz/c/fx-reference-rates-api-latest-rates-b37dab71/llms.txt): $0.001/call via x402. Returns the most recent ECB foreign exchange reference rates expressed in a requested base currency, optionally filtered to specific currency symbols.
- [FX Reference Rates API – Macro Dataset](https://www.zero.xyz/c/fx-reference-rates-api-macro-dataset-36d19009/llms.txt): $0.2/call via x402. Returns World Bank macroeconomic indicators (GDP, inflation, unemployment, debt, etc.) for ~217 economies, plus country-level metadata.
- [FX Reference Rates API – AI Pricing Bulk Dataset](https://www.zero.xyz/c/fx-reference-rates-api-ai-pricing-bulk-dataset-54875aa3/llms.txt): $0.1/call via x402. Returns a single JSON containing all cloud GPU instance prices (AWS + Azure, 10 regions, on-demand and spot) and all LLM API token prices (~3,300 models), refreshed daily.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)