AI sequence diagram generator

Sequence diagrams with AI.

Describe interactions between systems, actors, or services and AI generates professional sequence diagrams with lifelines, chronological messages, and request-response flows.

Start creating free
AI sequence diagram

System interactions made visual.

From API call flows to user-system interactions, describe any message exchange in plain language and AI generates clear sequence diagrams with actors, lifelines, and chronological message arrows.

A sequence diagram generated by AI on a MockFlow board
AI generate

Describe interactions, get a sequence diagram.

Tell AI about the actors and messages in your interaction. It generates a complete sequence diagram with participant lifelines, labeled message arrows, and proper chronological ordering automatically.

"User login flow between browser, API server, auth service, and database"
"E-commerce checkout showing interactions between user, cart service, payment gateway, and inventory"
"REST API request lifecycle from client through load balancer, web server, cache, and database"
An interaction description turned into a sequence diagram on the board
Message flows

Actors, lifelines and message arrows.

AI automatically identifies participants and creates proper sequence diagram elements. Each actor gets a distinct lifeline, and messages flow chronologically from top to bottom with labeled arrows showing the interaction pattern.

  • Actor lifelines. Users, servers, databases, services, microservices, APIs.
  • Request messages. HTTP calls, function invocations, API requests, events.
  • Response messages. Return values, callbacks, acknowledgments, error responses.
  • Interaction patterns. Synchronous calls, async events, pub/sub, webhooks.
Actors, lifelines and message arrows in a sequence diagram
Edit and customize

Fully editable after generation.

Every AI-generated sequence diagram is fully editable. Add or remove actors, modify messages, reorder interactions, change colors, and adjust the layout to match your exact needs. Regenerate with a different prompt to explore alternative interaction patterns.

  • Edit messages and labels. Rename actors, update message labels, fix API endpoints.
  • Reorder interactions. Rearrange message sequence, adjust timing, fix flow order.
  • Add and remove actors. Insert additional participants, services, or message steps.
Editing an AI generated sequence diagram
MockFlow boards

Part of your AI whiteboard.

Sequence diagrams live on your MockFlow board alongside mind maps, documents, flowcharts, and other AI-powered components. Generate diagrams, document architectures, and collaborate with your team, all in one place.

  • AI components. Mind maps, documents, charts, tables and more on one canvas.
  • Real time collaboration. Work together with your team on the same whiteboard.
A sequence diagram next to other components on a MockFlow board
Free unlimited AI

Use your own AI. No limits. No credits.

Connect MockFlow to your Claude or ChatGPT account through MCP or GPT Actions. Your API, your usage. Generate unlimited sequence diagrams without worrying about credits or restrictions.

MCP for Claude

Generate sequence diagrams directly from Claude Desktop using our Model Context Protocol server.

Set up MCP

GPT Actions

Add MockFlow as a GPT Action. Generate sequence diagrams from any ChatGPT conversation.

Open in ChatGPT
How it works

How AI sequence diagrams work.

From interaction description to visual message flow in three steps.

Step 1

Describe the interaction

Type the actors and message flow you want to visualize. AI understands software architecture, API patterns, and system interactions.

Step 2

AI creates the diagram

AI generates actor lifelines with chronological message arrows, labeled with proper request-response patterns and interaction details.

Step 3

Refine and export

Edit actors, adjust messages, or regenerate with a different prompt. Export as PNG, SVG for documentation and design reviews.

Use cases

AI sequence diagrams for every scenario.

From API documentation to system design, AI creates the right interaction diagram.

API documentation

Visualize REST API call flows between client, server, middleware, and database with request/response details.

Microservices architecture

Map inter-service communication patterns, event-driven workflows, and service mesh interactions.

Authentication flows

Diagram OAuth, JWT, SSO, and other auth flows between user, client app, auth server, and resource server.

Payment processing

Visualize payment gateway interactions, transaction verification, and settlement flows across systems.

System design interviews

Quickly sketch interaction patterns for distributed systems, caching layers, and message queues.

User interaction flows

Map user actions through frontend, backend, third-party APIs, and notification services step by step.

Prompts

Try these AI sequence prompts.

Try these prompts to create sequence diagrams instantly.

"User login flow between browser, API gateway, authentication service, and user database"

"E-commerce order placement flow between customer, web app, order service, payment gateway, and inventory"

"OAuth 2.0 authorization code flow between user, client app, authorization server, and resource server"

"Chat message delivery flow between sender, WebSocket server, message queue, and recipient"

"File upload process between client, CDN, upload service, virus scanner, and cloud storage"

"Database transaction with two-phase commit between coordinator, participant A, and participant B"

Questions

Frequently asked questions.

What is a sequence diagram?
A sequence diagram shows how actors (users, systems, services) interact over time through messages. Actors are shown as vertical lifelines, and messages flow between them as horizontal arrows arranged chronologically from top to bottom.
How many actors can AI create?
AI typically generates 2-6 actors based on your description, each with a distinct color and lifeline. You can add or remove actors after generation, or regenerate with a more detailed prompt.
Can it show request-response pairs?
Yes! AI generates paired message arrows showing requests going one direction and responses returning, clearly labeled with method names, data payloads, or status codes.
Does it support async and event-driven patterns?
AI can diagram both synchronous request-response flows and asynchronous patterns like pub/sub, webhooks, and event-driven architectures with appropriate message labeling.
Can I use these for technical documentation?
The diagrams can be exported as high-resolution PNG or SVG for use in API docs, architecture documents, design reviews, and technical specifications.
Is the AI sequence diagram generator free?
MockFlow includes AI credits with all plans. For unlimited usage, connect your own Claude (via MCP) or ChatGPT (via GPT Actions) API, then you can generate sequence diagrams with no limits at all.
Get started

Ready to visualize system interactions?

Describe your message flow and get a professional sequence diagram in seconds.

Create a free sequence diagramAll diagram types
AI credits on every planFree to start
Try it now

Tell Mida the systems and messages you want to map and it starts the board for you.