network-inspection

network-inspection is a skill for Claude Code from jpoutrin/product-forge. It costs 38 tokens per session (1,656 once invoked), scanned A, original, MIT.

A browser-based method for examining HTTP requests and responses, including status codes, errors, request data, and returned data.

In plain words
What is it for?
Use it to investigate failed API calls, inspect network traffic, analyze response data, and diagnose common HTTP errors.
Why use it?
It helps locate whether an API problem comes from the URL, request, authentication, permissions, validation, rate limits, or server failure.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the product-design plugin — 43 skills, 8 agents shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/jpoutrin/product-forge/network-inspection
Any agent
npx skills add jpoutrin/product-forge --skill network-inspection
Clone the repo
git clone --depth 1 https://github.com/jpoutrin/product-forge

Made for: Claude Code.

Or install product-design, the plugin that ships this one along with the rest of its 43 skills, 8 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for network-inspection

README.md
[![agentmods](https://agentmods.dev/badge/skills/jpoutrin/product-forge/network-inspection.svg)](https://agentmods.dev/skills/jpoutrin/product-forge/network-inspection)
Your own site
<a href="https://agentmods.dev/skills/jpoutrin/product-forge/network-inspection"><img src="https://agentmods.dev/badge/skills/jpoutrin/product-forge/network-inspection.svg" alt="Measured on agentmods" height="20"></a>
Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,656 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00038 $0.01656
Opus 5 $0.00019 $0.00828
Sonnet 5 $0.00008 $0.00331
Haiku 4.5 $0.00004 $0.00166

Measured 2d ago against content hash 4838c560af99, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

network-inspection scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

3. **Test in isolation** - Use curl/Postman to eliminate frontend issues
plugins/product-design/skills/network-inspection/SKILL.md · 249 lines

How it starts

The opening of the file, as written. The whole thing — 249 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Network Inspection Skill

Systematic approach to analyzing network requests using Chrome DevTools MCP.

HTTP Status Code Reference

Success (2xx)

Code Meaning Notes
200 OK Standard success response
201 Created Resource successfully created
204 No Content Success, no body returned

Redirect (3xx)

Code Meaning Debugging Action
301 Moved Permanently Update hardcoded URLs
302 Found (Temporary) Check redirect logic
304 Not Modified Cache is working correctly

Client Error (4xx)

Code Meaning Debugging Action
400 Bad Request Check request payload/parameters
401 Unauthorized Check auth token/session
403 Forbidden Check permissions/roles
404 Not Found Check URL/endpoint spelling
405 Method Not Allowed Check HTTP method (GET/POST/etc)
409 Conflict Check for duplicate data
422 Unprocessable Entity Check validation errors in response
429 Too Many Requests Implement rate limiting/retry

Server Error (5xx)

Code Meaning Debugging Action
500 Internal Server Error Check backend logs
502 Bad Gateway Check proxy/load balancer
503 Service Unavailable Check server health
504 Gateway Timeout Check backend performance

Network Request Analysis Workflow

1. List All Requests

Use Chrome DevTools MCP to list network requests:

Tool: mcp__chrome-devtools__list_network_requests

2. Filter by Status

Focus on failures first:

  1. 5xx errors - Server issues (highest priority)
  2. 4xx errors - Client issues (request problems)
  3. Slow requests - Performance issues
  4. Successful requests - Verify data is correct

3. Inspect Specific Request

Get detailed information:

Tool: mcp__chrome-devtools__get_network_request
Parameters: { "requestId": "request-id-here" }

Read the full file on GitHub · 249 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 249 lines · 38 tokens per session scan A 4838c560af99

Subscribe to this mod's changes

network-inspection is a skill published in the GitHub repository jpoutrin/product-forge (15 stars, last pushed 6mo ago), licensed MIT. It adds 38 tokens to every session and 1,656 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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