postman

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Postman Plugin for Claude Code

The Postman Plugin provides a single, simple install for Claude Code. It provides full API lifecycle management, and best practices when working with Postman APIs.

What's included:

• Commands for setting up the Postman MCP Server (no more manual installs!), working with Collections, Tests, Mock Servers, and generating code and documentation from Collections
• Skills for API discovery and client code generation, OpenAPI spec generation, Postman CLI workflows, and API best practices
• Agent for reviewing API production readiness and providing recommendations based on the <a href="https://www.postman.com/ai/90-day-ai-readiness-playbook/">Postman API Readiness Guide</a>.

Installation

Install directly from GitHub:

claude plugin install github:Postman-Devrel/postman-claude-code-plugin

<details> <summary>Alternative: load from a local clone</summary>

git clone https://github.com/Postman-Devrel/postman-claude-code-plugin.git
cd your-api-project/
claude --plugin-dir /path/to/postman-claude-code-plugin

</details>

Quick Start

1. Start Claude Code:

claude

2. Run setup:

/postman:setup

3. Authenticate when prompted — OAuth (recommended), which opens a browser sign-in with no key copying, or an API key:

export POSTMAN_API_KEY=PMAK-your-key-here

If you use an API key, add it to your shell profile (~/.zshrc or ~/.bashrc) to persist across sessions. Get one at go.postman.co/settings/me/api-keys.

That's it. The plugin auto-configures the Postman MCP Server, verifies your connection, and lists your workspaces. You're ready to go.

Commands

| Command | What It Does | |---------|-------------| | /postman:setup | Configure API key, verify connection, select workspace | | /postman:sync | Create or update Postman collections from OpenAPI specs | | /postman:search | Find APIs across your org's resources, your workspaces, and the public Postman network | | /postman:context | Fetch real API definitions, generate and maintain typed client code | | /postman:test | Run collection tests, diagnose failures, suggest fixes | | /postman:mock | Create mock servers for frontend development | | /postman:docs | Generate, improve, and publish API documentation | | /postman:security | Security audit against OWASP API Top 10 | | /postman:learn | Search the Postman Learning Center for how-to guidance and suggested workflows (Full mode) |

What You Can Do

Sync your API to Postman

"Sync my OpenAPI spec with Postman"
→ Detects local spec, creates/updates collection, sets up environment

Generate client code from private APIs

"Generate a TypeScript client for the payments API"
→ Reads your Postman collection, detects project language, writes typed code

Search across your workspace

"Is there an endpoint that returns user emails?"
→ Searches across your org's collections, drills into endpoint details, shows response shapes

Run API tests

"Run the tests for my User API collection"
→ Executes collection, parses results, diagnoses failures, suggests code fixes

Create mock servers

"Create a mock for frontend development"
→ Generates missing examples, creates mock, provides integration config

Audit API security

"Run a security audit on my API"
→ 20+ checks including OWASP Top 10, severity scoring, remediation guidance

Check if your API is agent-ready

"Is my API ready for AI agents?"
→ 48 checks across 8 pillars, scored 0-100, prioritized fix recommendations

Natural Language Routing

You don't need to remember command names. Claude matches your intent to the right command or skill natively:

• "Sync my collection" runs /postman:sync
• "Check for vulnerabilities" runs /postman:security
• "Is my API agent-ready?" triggers the readiness analyzer

API Readiness Analyzer

The built-in readiness analyzer evaluates APIs for AI agent compatibility across 8 pillars:

| Pillar | What It Checks | |--------|---------------| | Metadata | operationIds, summaries, descriptions, tags | | Errors | Error schemas, codes, retry guidance | | Introspection | Parameter types, required fields, examples | | Naming | Consistent casing, RESTful paths | | Predictability | Response schemas, pagination, date formats | | Documentation | Auth docs, rate limits | | Performance | Rate limit headers, caching, bulk endpoints | | Discoverability | OpenAPI version, server URLs |

70%+ with no critical failures = Agent-Ready.

Requirements

• Claude Code v1.0.33+
• A Postman account — authenticate via OAuth during /postman:setup, or set a POSTMAN_API_KEY environment variable
• No Python, Node, or other runtime dependencies

How It Works

The plugin bundles a .mcp.json file that auto-configures the Postman MCP Server when installed. All commands communicate with Postman through MCP tools. No scripts, no dependencies, pure MCP.

By default the plugin connects to the full Postman MCP Server (100+ tools). Recent Claude Code versions load MCP tool schemas on demand, so the full server adds little context overhead. If you're on an older client or want a lighter session, set POSTMAN_MCP_MODE before starting Claude Code to pick a smaller server mode:

export POSTMAN_MCP_MODE=minimal   # ~42 CRUD tools; code-generation (context) tools unavailable
export POSTMAN_MCP_MODE=code      # ~24 read-only tools for API discovery and client code generation

License

Apache-2.0

See Also

• Postman Plugin for Cursor - Same capabilities, adapted for Cursor IDE
• Postman Agent Skills - Portable skills for any skills.sh-compatible agent
• Postman Cursor Rules - Lightweight MCP config + rules for Cursor

Links

• Postman MCP Server Docs
• Get a Postman API Key
• Postman Status