T-0D 00:00:00PROMPTUILAUNCH DAY: MAY 12"please be concise" is not a strategyPROMPT QUALITYGOOGLE DOCS PROMPTSVERSION CONTROL FOR PROMPTS"just write a good prompt" — famous last wordsTEAM COLLABORATIONCOPY-PASTE FROM SLACKAI-POWERED IMPROVEMENT"it worked yesterday idk what changed"BYOK — YOUR KEYS, YOUR MODELSPROMPT VERSIONING"can someone find that prompt?"VISUAL DIFFSVIBES-BASED PROMPT ENGINEERINGT-0D 00:00:00PROMPTUILAUNCH DAY: MAY 12"please be concise" is not a strategyPROMPT QUALITYGOOGLE DOCS PROMPTSVERSION CONTROL FOR PROMPTS"just write a good prompt" — famous last wordsTEAM COLLABORATIONCOPY-PASTE FROM SLACKAI-POWERED IMPROVEMENT"it worked yesterday idk what changed"BYOK — YOUR KEYS, YOUR MODELSPROMPT VERSIONING"can someone find that prompt?"VISUAL DIFFSVIBES-BASED PROMPT ENGINEERING
Context platform · MCP-ready

The context layer betweenyour team and your agents.

One place to store, improve and share your team's context. Compose it with {{slug}} references. Connect your AI agents directly.

promptui
LatticeCampaignsoutbound_cold_email_cto
ImproveSave

outbound_cold_email_cto

Cold outreach email to CTOs of B2B engineering teams

v5
EditorHistoryTests
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Context your whole team can build on

Stop losing your best prompts, personas and workflows in scattered docs and chat threads. One versioned library your team manages and your AI agents consume directly.

Agent-ready via MCP

Claude Code, Cursor, or any MCP-compatible agent reads your context directly. No copy-paste, no drift. Always the latest version.

Compose from pieces

Reference one context block inside another with {{slug}} syntax. Update once, reflect everywhere. Automatically.

AI-powered improvement

Apply proven AI best practices to your context: CRAFT, Few-Shot, Structured Output and more. One click, full diff, every change tracked.

Full version history

Every edit creates a version. Compare side-by-side with visual diff. Activate or restore any version at any time.

Test before you deploy

Run your context against any model before it goes live. Generate inputs, track run history, and replay tests.

Roles and governance

Invite your team with roles. Admins manage structure, editors create content, viewers review. Everyone stays aligned.

From scattered docs to a shared context layer

A simple workflow any team member or AI agent can follow.

01

Build

Write in a rich editor. Compose context from reusable blocks using {{slug}} references.

02

Improve

Apply AI techniques. Review the diff side-by-side, activate when ready.

03

Test

Run against any model. Compare outputs across versions before shipping.

04

Share

Your team and AI agents always access the latest version via the shared library.

Built for teams, agents and developers

One shared context layer that works for every person and every AI in your organization.

Your team

Writers, marketers and operators keep their best personas, brand voice and workflows in one shared place. Everyone works from the same source of truth.

  • Shared context library
  • Folders and organization
  • Role-based access

Your AI agents

Claude, ChatGPT, Cursor or any compatible agent reads your context directly. Your agents always have the right instructions, with no manual updates needed.

  • Native MCP server
  • Live context access
  • No hardcoded prompts

Your developers

Build agents and automations that pull context from the shared library via API or MCP. Version-controlled context as a service. No more prompts hardcoded across repositories.

  • REST API access
  • MCP integration
  • Version history via API

Your agents connect to the context layer directly

PromptUI ships a native MCP server. Claude Code, Cursor, or any MCP-compatible client can list, read, and update your organization's context without leaving the tool. One command to set it up, zero friction.

Ask Claude. It knows your context.

Your AI agents have live access to your entire context library. Here's what that unlocks.

Claude · connected to PromptUI

Apply the CRAFT template to our "onboarding-email" prompt. Keep the conversational tone and don't remove the FAQ block.

Smart Improvement

Claude reads the template and the prompt directly, applies targeted improvements respecting your constraints, and saves a new version with a descriptive change note.

New version savedConstraints respectedChange note auto-generated

One context layer for your team and your agents.

Invite your team when you're ready. Connect your AI agents instantly.