One platform for every production prompt, delivered via a single API call.
Every model call in production depends on prose, and nobody knows which version is the good one. When something breaks, you roll back code but the prompt is gone.
PromptOT is the CMS prompts deserved. Author in typed blocks, version with real history, evaluate against saved test cases, and deliver to any model without changing your app.
Everything teams need to author, version, evaluate, and deliver LLM prompts in production. All in one workflow.
Six first-class block types: role, context, instructions, guardrails, output_format, and custom. Each is typed, validated, and versioned independently.
{{batch_size}}.Every change is a versioned artifact with an author, a reason, and a diff. Roll back in one click.
Any version against your saved test cases, across the models you use. Pass/fail, latency, and cost side by side.
Fetch the compiled prompt from a simple REST endpoint. Environment-scoped keys decide whether you get published or draft.
const res = await fetch(
`${API}/v1/prompts/${ID}`,
{ headers: { Authorization:
`Bearer ${KEY}` } }
);Your prompts are also an MCP server. Use them directly in your clients — no SDK, no code change.
An editor that reads with you. Ask it to tighten a guardrail, explain why v003 underperformed, or draft the next iteration.
You don't need a rewrite. Connect PromptOT to your existing app with a single API call and migrate one prompt at a time.
Compose each prompt as six typed blocks. Add variables, examples, and guardrails. The editor validates everything as you type.
Run drafts against your saved test cases across the models you use in production. When v005 passes, promote it. When it doesn't, see exactly which test cases failed and why.
Swap your hard-coded string for a fetch call. Or connect via MCP and let Claude, Cursor, or Codex pull the latest themselves.
From two-person startups to platforms with millions of calls, PromptOT is the prompt layer between your team and every model.
Tips, tutorials, and insights on prompt engineering and LLM management.
Every plan includes the full editor, six block types, unlimited versions, and API + MCP delivery. Scale when you're ready.
or $24/month billed annually ($290/year, save 17%)
Get Pro →Three minutes to your first compiled prompt. Five to your first API call. No credit card required.