---
title: "Pyth API Reference: On- and Off-Chain Developer Tools"
description: >-
  Pyth Core’s API reference covers EVM, Aptos, CosmWasm, and Hermes. It provides
  interactive documentation and guides for both on-chain and off-chain
  integration.
full: false
index: false
---

# API Reference

The API reference is a comprehensive guide to the various APIs -- both on- and off-chain -- that developers can use in their applications.
Developers can consult this reference to better understand what methods exist and what they do.
The API reference is interactive, so developers can try out the APIs from the website to better understand their behavior.

The following on-chain contracts are documented in the API reference:

- [EVM](api-reference/evm)
- [Aptos](api-reference/aptos)
- [CosmWasm](api-reference/cosmwasm)

Hermes also has interactive API documentation hosted by the service itself:

- [Hermes](https://hermes.pyth.network/docs/)
