cors-cookie-auth

cors-cookie-auth is a skill for Claude Code, Codex from pmarashian/cursor-agent-skills. It costs 73 tokens per session (318 once invoked), scanned A, original, no licence file.

A troubleshooting guide for cookie-based login when a frontend and backend run on different web origins, such as different ports. It covers the CORS browser rules that control these requests.

In plain words
What is it for?
Use it to configure allowed origins and credentials, or to add the required CORS headers directly to API route handlers.
Why use it?
It helps identify why authentication cookies are rejected or missing in cross-origin API calls.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it to configure allowed origins and credentials, or to add the required CORS headers directly to API route handlers.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/pmarashian/cursor-agent-skills/cors-cookie-auth
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.

Any agent
npx skills add pmarashian/cursor-agent-skills --skill cors-cookie-auth
Clone the repo
git clone --depth 1 https://github.com/pmarashian/cursor-agent-skills

Made for: Claude Code, Codex.

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 cors-cookie-auth

README.md
[![agentmods](https://agentmods.dev/badge/skills/pmarashian/cursor-agent-skills/cors-cookie-auth/github.svg)](https://agentmods.dev/skills/pmarashian/cursor-agent-skills/cors-cookie-auth)
Your own site
<a href="https://agentmods.dev/skills/pmarashian/cursor-agent-skills/cors-cookie-auth"><img src="https://agentmods.dev/badge/skills/pmarashian/cursor-agent-skills/cors-cookie-auth/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for cors-cookie-auth

Your own site · 80×15
<a href="https://agentmods.dev/skills/pmarashian/cursor-agent-skills/cors-cookie-auth"><img src="https://agentmods.dev/badge/skills/pmarashian/cursor-agent-skills/cors-cookie-auth.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 73 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 318 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.00073 $0.00318
Opus 5 $0.00036 $0.00159
Sonnet 5 $0.00015 $0.00064
Haiku 4.5 $0.00007 $0.00032

Measured 10d ago against content hash 380d9521c9c3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

cors-cookie-auth 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 10d 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.

- Use `curl -v -H 'Origin: http://localhost:3001' http://localhost:3000/api/...` and confirm `Access-Control-*` headers are present in the response.
cors-cookie-auth/SKILL.md · 27 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 10d ago First seen · 27 lines · 73 tokens per session scan A 380d9521c9c3

Subscribe to this mod's changes

cors-cookie-auth is a skill published in the GitHub repository pmarashian/cursor-agent-skills (2 stars, last pushed 6mo ago), with no licence file. It adds 73 tokens to every session and 318 once invoked, about $0.0004 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 2026-08-31.

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