http-evidence

http-evidence is a skill for Codex from deonmenezes/mantishack. It costs 43 tokens per session (417 once invoked), scanned A, original, Apache-2.0.

A tool for turning captured web requests and responses into redacted evidence records with stable reference IDs.

In plain words
What is it for?
It helps prepare HTTP proof for web security findings without storing raw credentials, tokens, cookies, or full response bodies.
Why use it?
It removes secrets and limits stored response content before traffic is attached to a security finding. The stable IDs help link identical evidence and avoid duplicates.

Skill for Codex

Written for Codex: installed under .codex/.

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/deonmenezes/mantishack/http-evidence
Any agent
npx skills add deonmenezes/mantishack --skill http-evidence
Clone the repo
git clone --depth 1 https://github.com/deonmenezes/mantishack

Made for: 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 http-evidence

README.md
[![agentmods](https://agentmods.dev/badge/skills/deonmenezes/mantishack/http-evidence.svg)](https://agentmods.dev/skills/deonmenezes/mantishack/http-evidence)
Your own site
<a href="https://agentmods.dev/skills/deonmenezes/mantishack/http-evidence"><img src="https://agentmods.dev/badge/skills/deonmenezes/mantishack/http-evidence.svg" alt="Measured on agentmods" height="20"></a>
Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 417 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00043 $0.00417
Opus 5 $0.00022 $0.00209
Sonnet 5 $0.00009 $0.00083
Haiku 4.5 $0.00004 $0.00042

Measured 6d ago against content hash 2f7c9fbab19b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

http-evidence scanned grade A with 0 findings 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 6d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.codex/skills/http-evidence/SKILL.md · 17 lines

What it actually says

Use http_audit (mantis_http_audit MCP server) whenever you have a captured HTTP exchange that proves a web finding, before attaching it as evidence. It converts raw request/response text into a bounded, redacted evidence pack and a stable request_ref/response_ref hash.

Why go through it instead of pasting the raw exchange into the finding:

  • It strips secret-bearing headers (Authorization, Cookie, Set-Cookie, X-Api-Key, CSRF tokens, ...) and inline secrets (AWS keys, GitHub/Slack tokens, JWTs, private keys, user:pass@ in URLs). Raw secrets must never land in a finding, artifact, report, or prompt (PRD section 9/11).
  • It bounds the body: full bodies are hashed and previewed (first 512 bytes), never stored whole.
  • The request_ref is a stable hash of the exchange, so the same request always maps to the same id -- use it to cross-reference and dedup evidence across findings.

Workflow: capture the request (and response) text -> call http_audit({ request, response }) -> attach the returned request_ref/response_ref and the redacted pack to the finding via mantis_findings finding_update evidence. The tool makes NO network call itself; you pass in traffic you already captured under authorized, scoped testing.

Do not defeat the redaction by separately pasting the raw header/body you just redacted into the finding or report. If you need to prove a specific secret was exposed, reference it by its redaction label and location, and follow the secrets-scan skill's remediation guidance (rotate/revoke, then remove from source and history).

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. 6d ago First seen · 17 lines · 43 tokens per session scan A 2f7c9fbab19b

Subscribe to this mod's changes

http-evidence is a skill published in the GitHub repository deonmenezes/mantishack (493 stars, last pushed 25d ago), licensed Apache-2.0. It adds 43 tokens to every session and 417 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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