sast-idor

sast-idor is a skill for Claude Code, Codex from capture0x/YeepForge. It costs 103 tokens per session (4,956 once invoked), scanned A, original, no licence file.

A source-code review for Insecure Direct Object Reference (IDOR), where an application exposes a record identifier without checking whether the requester may use it. It finds candidate endpoints and checks their ownership or authorization rules.

In plain words
What is it for?
Use it to inspect APIs and routes that access users, orders, files, messages, or other records by identifier.
Why use it?
It helps detect cases where changing an ID in a request could reveal or modify another user’s data. The review focuses on authorization at the endpoint.

Skill for Claude CodeCodex

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

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/capture0x/yeepforge/sast-idor
Any agent
npx skills add capture0x/YeepForge --skill sast-idor
Clone the repo
git clone --depth 1 https://github.com/capture0x/YeepForge

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 sast-idor

README.md
[![agentmods](https://agentmods.dev/badge/skills/capture0x/yeepforge/sast-idor.svg)](https://agentmods.dev/skills/capture0x/yeepforge/sast-idor)
Your own site
<a href="https://agentmods.dev/skills/capture0x/yeepforge/sast-idor"><img src="https://agentmods.dev/badge/skills/capture0x/yeepforge/sast-idor.svg" alt="Measured on agentmods" height="20"></a>
Per session 103 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,956 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
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 $0.00103 $0.04956
Opus 5 $0.00051 $0.02478
Sonnet 5 $0.00021 $0.00991
Haiku 4.5 $0.00010 $0.00496

Measured 5d ago against content hash ebc449a5bbc8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

sast-idor 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 5d 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.

> [curl command or step-by-step instructions to confirm this finding on the live app.
modules/sast_skills/sast-idor/SKILL.md · 471 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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. 5d ago First seen · 471 lines · 103 tokens per session scan A ebc449a5bbc8

Subscribe to this mod's changes

sast-idor is a skill published in the GitHub repository capture0x/YeepForge (1 stars, last pushed 12d ago), with no licence file. It adds 103 tokens to every session and 4,956 once invoked, about $0.0005 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.

Related

Other skills, from other repositories