Hermes

Hermes is an open-source service that listens to the Pythnet and the Wormhole Network for Pyth price updates, and serves them via a convenient web API.

Hermes allows users to easily fetch price updates via a REST API, or subscribe to server-side streaming updates.

Public Endpoints

The Pyth Data Association operates a public endpoint for Hermes, which can be used to test integrations with Pyth Network:

URL: https://hermes.pyth.network (opens in a new tab)

Rate limits

In order to maximize the reliability of the Public Hermes API, a request rate limit is enforced. All endpoints limits are set at 30 requests every 10 seconds per IP address. Clients issuing request above the limit will receive a 429 (Too Many Requests) response for the subsequent 60-second period.

For production deployments, developers integrating with Pyth Network are strongly encouraged to use Node Providers for maximum resilience and decentralization. Moreover, Hermes is designed to be self-hosted, so developers can run their own instance of Hermes to fetch Pyth price updates.

Node Providers

The following node providers offer Hermes:

• Triton (opens in a new tab)
• P2P (opens in a new tab)
• extrnode (opens in a new tab)
• Liquify (opens in a new tab)

Self-Hosting

The Pyth Data Association provides a Helm chart for running Hermes in charts (opens in a new tab) repository. Please refer to the chart's readme for the configuration values. You will need a Pythnet RPC to run Hermes; see the guide for accessing a Pythnet RPC.