Prompt engineering
with guardrails.
Manage, version, test, and deploy prompts with the confidence of a CI/CD pipeline. Now with built-in evals, A/B testing, and quality gates.
Evals
New14+ assertion types including contains, regex, JSON schema, cosine similarity, and LLM-as-judge. Run test suites against datasets with statistical rigor.
Quality Gates
NewSet pass/fail thresholds on eval suites. Block deployments that don't meet your quality bar. Wire into CI/CD pipelines.
Version Control
Named deployment targets (dev, staging, prod). Diffs between versions, changelogs, and instant rollback when needed.
A/B Testing
NewCompare prompt variants with statistical significance. Run experiments, collect metrics, and ship the version that performs best.
Regression Detection
NewPin baselines, auto-compare eval runs across versions. Catch regressions before they ship to production.
Multi-Language SDKs
Official JavaScript and Python SDKs with fluent API and built-in converters for OpenAI, Anthropic, Google, Vercel AI, and LangChain.
Centralized Prompt Library
Store all your prompts in one place. Organize by project, tag, and search across your entire library.
REST API Access
Fetch prompts programmatically with our REST API. Perfect for CI/CD pipelines and production apps.
Team Collaboration
Share prompts with your team. Set permissions, track usage, and collaborate in real-time.
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.
import { toOpenAI, toAnthropic } from "@echostash/sdk"
// Convert to OpenAI format
const openaiPrompt = toOpenAI(prompt)
// Convert to Anthropic format
const anthropicPrompt = toAnthropic(prompt)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.