# Services from x402-v1.sky-1.org on Zero

> x402-v1.sky-1.org serves 13 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/x402-v1.sky-1.org
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/x402-v1.sky-1.org/health.json

## Services

- [rate-hub API – Top Crypto Rates](https://www.zero.xyz/c/rate-hub-api-top-crypto-rates-34c5942a/llms.txt): $0.05/call via x402. Returns current prices, 24h change, market cap, volume, and rank for the top cryptocurrencies in a single aggregated snapshot.
- [rate-hub API – /v1/rates (Crypto & Asset Rates Lookup)](https://www.zero.xyz/c/rate-hub-api-v1-rates-crypto-asset-rates-lookup-036cff7f/llms.txt): $0.05/call via x402. Returns current prices, 24h change, market cap, and volume for one or more crypto assets (e.g. BTC, ETH) via an aggregated data feed.
- [rate-hub API – Snapshot by Class](https://www.zero.xyz/c/rate-hub-api-snapshot-by-class-0c3da5af/llms.txt): $0.05/call via x402. Returns a real-time snapshot of cryptocurrency rates for a specified asset class, including price, 24h change, and metadata.
- [rate-hub API – List Tracked Assets](https://www.zero.xyz/c/rate-hub-api-list-tracked-assets-e4d318ac/llms.txt): $0.05/call via x402. Returns the full list of tracked crypto assets (with metadata) and candidate assets under consideration for addition.
- [rate-hub API – Daily Rates by Day](https://www.zero.xyz/c/rate-hub-api-daily-rates-by-day-f1e996f7/llms.txt): $0.05/call via x402. Returns aggregated daily price/rate data (e.g. crypto asset prices) for a specific calendar day
- [rate-hub API – Historical Price Series](https://www.zero.xyz/c/rate-hub-api-historical-price-series-aa1ad7ae/llms.txt): $0.05/call via x402. Returns a time-series of historical exchange-rate price points for a given asset over a specified range, quoted in USD.
- [rate-hub API – Daily Rates](https://www.zero.xyz/c/rate-hub-api-daily-rates-d27a681e/llms.txt): $0.05/call via x402. Returns historical daily exchange rates for cryptocurrencies and other assets for one or more specified days
- [rate-hub API – Error Code Registry](https://www.zero.xyz/c/rate-hub-api-error-code-registry-130f5413/llms.txt): $0.05/call via x402. Returns the full list of structured error codes, their numeric IDs, snake_case codes, origins (client/server), and human-readable meanings for the rate-hub API.
- [rate-hub API – GET /v1/meta](https://www.zero.xyz/c/rate-hub-api-get-v1-meta-c3cbaa76/llms.txt): $0.05/call via x402. Returns the deployment's capability metadata: API version, supported quote currencies, asset limits, request limits, and data staleness thresholds
- [rate-hub API – GET /v1/categories](https://www.zero.xyz/c/rate-hub-api-get-v1-categories-670fd396/llms.txt): $0.05/call via x402. Returns the list of all asset/token categories (e.g. Layer 1, Stablecoins) with their IDs, display names, and associated asset UIDs
- [rate-hub Asset Lookup](https://www.zero.xyz/c/rate-hub-asset-lookup-a0917805/llms.txt): $0.05/call via x402. Look up blockchain asset details (chain, contract address, UID) by posting an HTTP-style query body
- [rate-hub API – Icon Image by UID](https://www.zero.xyz/c/rate-hub-api-icon-image-by-uid-e7a6d0ac/llms.txt): $0.05/call via x402. Returns a PNG icon image for a given unique identifier (UID) via a paid GET request
- [rate-hub API MCP Endpoint](https://www.zero.xyz/c/rate-hub-api-mcp-endpoint-41fdc0d7/llms.txt): $0.05/call via x402. Provides access to rate-hub API capabilities via MCP (Model Context Protocol) JSON-RPC 2.0 interface, gated by x402 USDC micropayment on Base

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)