Api Designer Pro
by Julian
Expert API architect to design, review, and audit REST, GraphQL, and event-driven API specifications.
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See it in action
You say
I need an API for a task management app. Users can create projects, add tasks to projects, and mark tasks as complete. Tasks can be assigned to users.
Your agent does
API DESIGN SPECIFICATION ════════════════════════════════════════ API Name: Task Manager API Version: v1 Base URL: /api/v1 Auth: Bearer JWT ════════════════════════════════════════
ENDPOINTS ────────────────────────────────────────────────────────────────── [RESOURCE: projects]
GET /projects List user's projects POST /projects Create project Body: { name: string, description?: string } Response: 201 { id, name, created_at }
GET /projects/{id} Get project with task summary PATCH /projects/{id} Update project name/description DELETE /projects/{id} Delete project (cascades to tasks)
[RESOURCE: tasks — nested under projects]
GET /projects/{id}/tasks List tasks in project Query: ?status=open|complete&assignee_id=&limit=&cursor= [... abbreviated ...]
What you get
About this skill
Professional API Architecture & Design
Designing robust, scalable, and secure APIs is a complex task that requires more than just listing endpoints. API Designer Pro serves as your virtual API architect, helping you design, review, and critique REST, GraphQL, and event-driven architectures using industry-standard patterns.
What it does
- Architectural Design: Converts high-level feature requirements into detailed API specifications including endpoints, schemas, and relationships.
- Design Audits: Analyzes existing designs for "smells" like improper resource naming, incorrect HTTP verb usage, or lack of idempotency.
- Multi-Paradigm Support: Provides specialized templates and rule-sets for RESTful resources, GraphQL types/resolvers, and asynchronous Event-Driven systems.
- Safety & Security: Automatically generates a security checklist and error catalog tailored to your specific design.
Why use this skill
Generic LLM prompts often produce "CRUD-dy" APIs that ignore production realities like pagination, versioning, and status code semantics. This skill enforces strict architectural principles—such as cursor-based pagination and resource-oriented URI structures—ensuring your API is ready for public consumption or enterprise integration. It provides structured, developer-ready documentation that can be immediately converted into OpenAPI specs or code.
How to install
Drop the file into your AI Agent. Works with Claude, Cursor, ChatGPT, and 20+ more.
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