Hedera Agent Kit - Pyth Plugin

A Hedera Agent Kit plugin that exposes Pyth Network price feeds via the Hermes API. Use it to pull real-time market data (crypto, FX, equities, commodities) with simple tool calls.

Overview

This plugin registers Pyth tools for:

• Discovering price feeds by symbol or description
• Fetching the latest price for a feed by ID or symbol
• Fetching latest prices for multiple feeds in one request

All tools return a { success: boolean, ... } payload so agents can reason about failures consistently.

Installation

npm install hak-pyth-plugin

Quick Start (Agent)

import { HederaAgent } from "hedera-agent-kit";
import { pythPlugin } from "hak-pyth-plugin";

const agent = new HederaAgent({
  plugins: [pythPlugin]
});

Configuration

Defaults:

• PYTH_BASE_URL (default: https://hermes.pyth.network)
• PYTH_TIMEOUT_MS (default: 10000)
• PYTH_RETRIES (default: 2)

You can override in code:

const agent = new HederaAgent({
  plugins: [pythPlugin],
  config: {
    pyth: {
      baseUrl: "https://hermes.pyth.network",
      timeoutMs: 10000,
      retries: 2
    }
  }
});

Tool Catalog

Usage Examples

List feeds by query:

const tools = pythPlugin.tools({});
const listTool = tools.find((tool) => tool.method === "pyth_list_price_feeds");
const result = await listTool?.execute(null, {}, { query: "BTC" });

if (result?.success) {
  console.log(result.count, result.feeds[0]);
}

Get latest price by symbol:

const priceTool = tools.find((tool) => tool.method === "pyth_get_latest_price");
const result = await priceTool?.execute(null, {}, { symbol: "BTC/USD" });

if (result?.success) {
  console.log(result.update?.formattedPrice, result.update?.publishTime);
}

Batch latest prices:

const pricesTool = tools.find((tool) => tool.method === "pyth_get_latest_prices");
const result = await pricesTool?.execute(null, {}, { symbols: ["BTC/USD", "ETH/USD"] });

if (result?.success) {
  console.log(result.updates.map((update) => update.formattedPrice));
}

Example Script (Local)

Build first, then run the demo script:

npm run build
npm run example

Optional overrides:

export PYTH_EXAMPLE_QUERY=BTC
export PYTH_EXAMPLE_FEED_ID=0xff61491a931112ddf1bd8147cd1b641375f79f5825126d665480874634fd0ace

Response Shape Notes

• update.formattedPrice applies the Pyth exponent for human-readable output.
• update.publishTime is an epoch timestamp (seconds).
• On failure, tools return { success: false, error }.

Integration Smoke Test

npm run test:integration

Optional env overrides:

export PYTH_BASE_URL=https://hermes.pyth.network
export PYTH_TEST_QUERY=BTC
export PYTH_TEST_FEED_ID=0xff61491a931112ddf1bd8147cd1b641375f79f5825126d665480874634fd0ace

Development

npm run build
npm run test
npm run lint

License

MIT