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Sub-agent that evaluates APIs for AI agent compatibility: - 48 checks across 8 pillars (Metadata, Errors, Introspection, Naming, Predictability, Documentation, Performance, Discoverability) - Weighted scoring (0-100, 70+ = agent-ready) - Priority-ranked fix recommendations with before/after examples - Can push improved specs to Postman via MCP - Includes sample readiness report as reference output Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Postman Plugin for Claude Code
Official Postman plugin for Claude Code. Manage your entire API lifecycle without leaving your editor.
Installation
/plugin install postman-skill
That's it. Type /postman and start managing your APIs.
Features
- Collection Management - List, create, update, delete, and duplicate collections
- Environment Management - Manage variables across workspaces
- Monitor Analysis - Check API health and debug failures
- Mock Servers - Create and manage mock servers
- Test Execution - Run collection tests with environments
- Agent-Readiness Analysis - Grade your APIs for AI agent compatibility using Clara
- Security Auditing - Check APIs for security issues
- Code Generation - Generate code snippets in Python, JavaScript, Go, and more
Usage
Natural Language
/postman
Show me all my collections
/postman
Create a mock server for my Payment API
/postman
Is my API ready for AI agents?
Common Operations
| Task | Example |
|---|---|
| List collections | "Show my collections" |
| Create collection | "Create a collection called User API" |
| Run tests | "Run tests for Payment API with staging environment" |
| Check monitors | "How are my monitors doing?" |
| Create mock | "Create a mock server for Order API" |
| Analyze agent-readiness | "Is my API ready for AI agents?" |
| Security audit | "Check my API for security issues" |
Setup
Prerequisites
- Python 3.7+
- Postman API Key
Configuration
-
Get your API key from Postman Account Settings
-
Create a
.envfile:
cp .env.example .env
# Edit .env and add: POSTMAN_API_KEY=PMAK-your-key-here
Agent-Readiness Analysis
This plugin includes Clara integration for grading APIs on AI agent compatibility.
Clara checks 8 pillars:
- Metadata - operationIds, summaries, descriptions
- Errors - Structured error responses
- Introspection - Parameter types, examples
- Naming - Consistent casing, RESTful paths
- Predictability - Response schemas
- Documentation - Auth docs, rate limits
- Performance - Response times
- Discoverability - Server URLs, spec accessibility
Score 70%+ with no critical failures = Agent Ready
Documentation Intelligence
This plugin includes the Postman Learning Center MCP for documentation access. When you ask "how do I..." questions, Claude can pull actual Postman docs instead of guessing.
/postman
How do I set up OAuth 2.0 authentication?
The plugin queries https://learning.postman.com/_mcp/server for accurate, up-to-date documentation.
Works With
This plugin complements:
- Postman Learning Center MCP - Documentation and how-to guides (included)
- Postman's MCP Server - Live API operations
License
MIT
Author
Sterling Chin (@sterlingchin) Developer Relations, Postman