Prompt Hippo Blog + Documentation

Welcome to the PromptHippo blog!

Tool Calling Agent with Structured Output using LangChain 🦜 + MCP Integration

Guide + code examples for creating LLM agents that can both call tools and provide back structured output using the LangChain module. - 6/28/25, Jon York

Getting Started with Prompt Testing using PromptHippo

Getting LLMs to spit out the data you want is no easy task. PromptHippo is a free prompt editing suite for you to use to create prompts that really work. - 6/25/25, Jon York

LLM Prompt Testing: All Your Mistakes

A guide to testing LLM prompts and avoiding common mistakes. - 8/4/24, Jon York

Create a Custom LangServe 🦜 Instance + Use Chat Playground

Create a custom LangServe project and set up the built-in LangServe playground. - 7/28/24, Jon York

AB Test Prompts on a Custom LangServe 🦜 Instance

Integrate a custom LangServe model into the LangServe playground. - 7/28/24, Jon York

Prompt Engineer Salary - How Much do Prompt Engineers Make?

A prompt engineer's annual salary is much higher than people might expect for writing English, something anyone can do. - 8/4/24, Jon York