Prompt engineering
with superpowers.
Manage, version, test, and deploy dynamic prompts powered by Echo PDK. Messages, tools, schemas, and 5 provider converters — built for teams shipping AI products.
Messages & Tools
NewFirst-class support for multi-turn conversations and function calling. Prompts are structured as role-based messages with optional tool definitions.
Evals & Quality Gates
New14+ assertion types, A/B testing, and automated pass/fail thresholds. Block bad deploys before they ship.
Playground
NewVisual editor with variable badges, code mode with Monaco, render preview, and LLM run with tool mocking.
Version Control
Every change creates an immutable version. Commit, diff, publish, and deploy to named targets.
5 Provider Converters
NewOne prompt, any LLM. Convert to OpenAI, Anthropic, Google, Vercel AI, or LangChain with a single method call.
JS + Python SDKs
Fluent API: es.prompt('id').vars({...}).openai(). Full TypeScript and Python type support.
Simple, powerful API
Integrate Echostash into your application with just a few lines of code.
import { Echostash } from "@goreal-ai/echostash"
// Initialize the client
const es = new Echostash({
apiKey: process.env.ECHOSTASH_API_KEY
})
// Fetch, render, and convert to OpenAI format
const messages = await es.prompt("welcome-message")
.vars({ userName: "Alice", language: "English" })
.openai()Works with every AI provider
Echostash prompts convert seamlessly to any provider format. One prompt, every platform.
const result = await es
.prompt("support-agent")
.vars({ name: "Alice" })
.openai()
// { messages, tools, model, temperature }
// Spread directly into your LLM call
await openai.chat.completions.create(result)Test before you deploy. Deploy with confidence.
Start with our free tier. Run evals, set quality gates, and ship prompts that work. No credit card required.