# Performing API Security Testing With Postman

> Use when using Postman to perform structured API security testing by building collections that test for OWASP API Security Top 10 vulnerabilities including authentication bypass, authorization flaws, injection, and data exposure. The tester creates environments with multiple user roles, writing test scripts for automated security validation, and integrating Postman with OWASP ZAP and Newman for CI/CD security testing.

- Skill: `oyi77/performing-api-security-testing-with-postman` (Agent Skill)
- Install (CLI): `npx skillmds add oyi77/performing-api-security-testing-with-postman`
- Raw SKILL.md: https://api.skillmd.com/api/skills/oyi77/performing-api-security-testing-with-postman/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: DevOps & Infra
- License: Apache-2.0
- Author: oyi77 (https://skillmd.com/u/oyi77)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/oyi77/performing-api-security-testing-with-postman

---


# Performing Api Security Testing With Postman

## Overview

Cybersecurity skill for performing api security testing with postman. Follows industry best practices and security standards.

## When to Use
**Trigger phrases:**
- "performing api security testing with postman"
- "Uses Postman to perform structured API security testing by building collections "


- Building repeatable API security test suites for OWASP API Security Top 10 coverage
- Creating automated security regression tests that run in CI/CD pipelines via Newman
- Testing API authentication and authorization across multiple user roles systematically
- Integrating Postman with OWASP ZAP proxy for combined manual and automated security testing
- Establishing a baseline security test collection for new API endpoints before deployment

**Do not use** against production APIs without authorization. Postman security testing involves sending potentially malicious payloads.


## When NOT to Use

- When you lack proper authorization for testing
- For production systems without change management
- When the task requires legal or compliance expertise beyond technical scope


## Prerequisites

- Postman Desktop or web application with an active workspace
- Target API with OpenAPI/Swagger specification for collection import
- Test accounts for at least three roles: unauthenticated, regular user, admin
- Newman CLI installed for CI/CD integration: `npm install -g newman`
- OWASP ZAP configured as local proxy (localhost:8080) for Postman proxy integration
- API environment variables for base URL, tokens, and test data

## Workflow

```python
# Example: IOC detection
import re

IOC_PATTERNS = {
    "ip": r"\b(?:\d{1,3}\.){3}\d{1,3}\b",
    "domain": r"\b[a-z0-9-]+\.[a-z]{2,}\b",
    "hash_md5": r"\b[a-f0-9]{32}\b",
    "hash_sha256": r"\b[a-f0-9]{64}\b",
}

def extract_iocs(text: str) -> dict:
    return {k: re.findall(v, text) for k, v in IOC_PATTERNS.items()}
```

1. **Plan Operations** — Define objectives, scope, and success criteria for api security testing operations.
2. **Prepare Environment** — Set up tools, access, and data sources required for api security testing.
3. **Execute Core Workflow** — Use postman to perform api security testing operations following established procedures.
4. **Validate Results** — Verify that results meet quality standards and objectives.
5. **Report Findings** — Document results, observations, and recommendations.
6. **Follow Up** — Track remediation actions and verify fixes where applicable.

## Tools

- **postman** — Primary tool for this skill
- **Analysis Platform** — Data processing and visualization
- **Collaboration Tools** — Team coordination and knowledge sharing


## Process

1. **Reconnaissance** — Gather target information, identify attack surface, enumerate services
1. **Analysis/Exploitation** — Execute the technique, analyze results, document findings
1. **Reporting** — Document IOCs, write findings, provide remediation recommendations

## Verification

- [ ] All api security testing procedures executed completely and documented
- [ ] Findings validated against multiple data sources
- [ ] False positives identified and filtered
- [ ] Results documented with evidence and timestamps
- [ ] Recommendations provided with risk-based prioritization

## Anti-Rationalization Table

| Rationalization | Reality |
|---|---|
| "We are too small to be targeted" | Automated attacks target everyone. Size does not matter. |
| "Security slows us down" | A breach slows you down 100x more. Build security in from the start. |
| "We will fix it after launch" | Vulnerabilities in production are exploited within hours. Fix before deploy. |