Design systems. Simulate behavior. Explain every outcome.

Design distributed-system diagrams, simulate success, retry, and failure paths, and share deterministic, replayable architecture stories with your team.

Start designing

User lookup flow

main · mutable draft · simulate lens

Client
Actorexec
API Gateway
Gatewayexec
User Service
Serviceexec
User Cache
Cacheexec
Users DB
Databaseexec
MISS
Request pathResponse pathData access
Workbench00:01:12.345
Deterministic simulationsReproduce behavior with certainty.
Replay with confidenceFrom any event, any time.
Share insights, not screenshotsContext that travels with runs.
Built for modern architecturesDesigned for distributed systems.
ABOUT MOCKFLOW

What is Mockflow?

Mockflow is a studio for designing, explaining, and simulating distributed systems.

Use Mockflow to model components and connections, simulate success, retry, timeout, and failure paths, and build deterministic, replayable architecture stories before changing production systems.

One model, three lenses

Design

Model systems with clarity.

01

Simulate

Run scenarios and explore behavior.

02

Present

Turn runs into shareable narratives.

03
MCP / REPOSITORY INTELLIGENCE

Turn your repository into a living system map.

Connect a coding agent to Mockflow. It can inspect your codebase and map your apps, services, data stores, and code flows. Turn on guarded editing when you want it to draft diagrams and scenarios for you to review.

Nothing is published or shared until you review it.

Explore agent access

CODING AGENT

EXAMPLE · GUARDED EDITING

I’ll use Mockflow to draft the system map and show which files support each connection.

Repository evidence becomes a reviewable architecture draft with end-to-end scenarios.Swipe or scroll to explore the full map.
01

Map the infrastructure

Identify apps, services, workers, queues, data stores, and system boundaries.

02

Trace code flows

Follow user journeys, APIs, events, and background work from entry point to outcome.

03

Draft runnable scenarios

Capture happy paths, retries, timeouts, and failures as scenarios ready for review.

A diagram is only the start.

Mockflow helps you see how a system works. Then it helps your team build, test, and change it with confidence.

One canonical modelEvidence that travels
01
Design

See the whole system.

Start with a clear model of your system: its services, data, and connections.

  • Show every component and connection.
  • See APIs, events, data, and side effects together.
Explore design
02
Simulate

Check what happens.

Run the important paths through your system. Each run is repeatable and easy to check.

  • Run the same test with the same inputs.
  • See every event, timing, and data change.
Explore simulate
03
Publish

Save what you trust.

Turn approved work into clear contracts, snapshots, and examples.

  • Keep OpenAPI, AsyncAPI, schemas, and journey details in sync.
  • See what changed between versions.
Explore publish
04
Hand off

Share the right context.

Give people and agents the context they need to build and test safely.

  • Share a pack with the journey, evidence, contracts, and gaps.
  • Give agents read-only access to only what they need.
Explore hand off