api-discovery

api-discovery is a skill for Claude Code from ceoimperiumprojects/imperium-brain. It costs 91 tokens per session (5,029 once invoked), scanned A, original, no licence file.

A tool for finding the behind-the-scenes interfaces a website uses, including REST or GraphQL endpoints, WebSockets, and login methods. These interfaces let a website exchange data with its server.

In plain words
What is it for?
It is for examining websites, finding internal APIs, studying single-page applications, and supporting integrations or competitive research.
Why use it?
It helps reveal how a web app works when its visible pages do not show the underlying data connections.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

Part of the imperium-brain plugin — 19 skills, 20 commands, 8 agents shipped together

Good fit It is for examining websites, finding internal APIs, studying single-page applications, and supporting integrations or competitive research.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ceoimperiumprojects/imperium-brain/api-discovery
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 ceoimperiumprojects/imperium-brain --skill api-discovery
Clone the repo
git clone --depth 1 https://github.com/ceoimperiumprojects/imperium-brain

Made for: Claude Code.

Or install imperium-brain, the plugin that ships this one along with the rest of its 19 skills, 20 commands, 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 api-discovery

README.md
[![agentmods](https://agentmods.dev/badge/skills/ceoimperiumprojects/imperium-brain/api-discovery.svg)](https://agentmods.dev/skills/ceoimperiumprojects/imperium-brain/api-discovery)
Your own site
<a href="https://agentmods.dev/skills/ceoimperiumprojects/imperium-brain/api-discovery"><img src="https://agentmods.dev/badge/skills/ceoimperiumprojects/imperium-brain/api-discovery.svg" alt="Measured on agentmods" height="20"></a>
Per session 91 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,029 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 $0.00091 $0.05029
Opus 5 $0.00046 $0.02514
Sonnet 5 $0.00018 $0.01006
Haiku 4.5 $0.00009 $0.00503

Measured 8d ago against content hash 206d610009dc, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

api-discovery 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 8d 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.

Or use curl from terminal:
skills/api-discovery/SKILL.md · 534 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

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 8d ago First seen · 534 lines · 91 tokens per session scan A 206d610009dc

Subscribe to this mod's changes

api-discovery is a skill published in the GitHub repository ceoimperiumprojects/imperium-brain (6 stars, last pushed 3mo ago), with no licence file. It adds 91 tokens to every session and 5,029 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.

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