Beauty Diagram
Use case

API workflow diagrams

Document API requests, auth handshakes, webhooks, retries, and integration flows with cleaner Mermaid sequence and flow diagrams.

The goal is not to rewrite the diagram from scratch, but to make the source easier to present and reuse.

At a glance

A scenario page for teams explaining integration behavior across clients, services, and external APIs.

Who this is forBest diagram typesWorkflow
Rendered proof
API request flow with auth and downstream service call.
Theme · Obsidian
Open this diagram in editor
Click upgradePOST /subscriptionsValidate sessionOKCreate checkoutCheckout URLRedirect URL User App API Auth Billing
View Mermaid sourcePlain-text diagram syntax — copy or edit directly.
diagram.mmd
1sequenceDiagram
2  actor User
3  participant App
4  participant API
5  participant Auth
6  participant Billing
7  User->>App: Click upgrade
8  App->>API: POST /subscriptions
9  API->>Auth: Validate session
10  Auth-->>API: OK
11  API->>Billing: Create checkout
12  Billing-->>API: Checkout URL
13  API-->>App: Redirect URL

Who this is for

Backend, platform, and integrations teams that need to explain how requests move across clients, services, queues, and external providers.

  • OAuth and session flows
  • Webhook delivery and retries
  • Client/server request lifecycles

Best diagram types

Sequence diagrams show actor-to-actor calls, while flowcharts capture retry, validation, and fallback logic.

Workflow

Start with the request path, label success and failure outcomes, then beautify the result so timing and ownership stay clear in docs.