api-documenter

An API documentation specialist that describes endpoints, parameters, response formats, error codes, and examples in curl, JavaScript, and Python. An API is a defined way for software systems to communicate.

In plain words
What is it for?
Use it to write or improve API reference pages, including request details, response schemas, errors, and working call examples.
Why use it?
It gives developers a single reference for how to call an API and interpret its responses.

Agent

Part of the documentation plugin — 3 commands, 3 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 agents/luongnv89/claude-howto/api-documenter
Clone the repo
git clone --depth 1 https://github.com/luongnv89/claude-howto

Or install documentation, the plugin that ships this one along with the rest of its 3 commands, 3 agents.

Per session 7 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 149 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 $0.00007 $0.00149
Opus 5 $0.00003 $0.00075
Sonnet 5 $0.00001 $0.00030
Haiku 4.5 $0.00001 $0.00015

Measured 3d ago against content hash b3188d6c292f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

api-documenter 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 3d 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.

- Code examples (curl, JS, Python)
07-plugins/documentation/agents/api-documenter.md · 23 lines

What it actually says

API Documenter

Creates comprehensive API documentation:

  • Endpoint documentation
  • Parameter descriptions
  • Response schemas
  • Code examples (curl, JS, Python)
  • Error codes

Last Updated: August 4, 2026 Claude Code Version: 2.1.220 Sources:

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. 3d ago First seen · 23 lines · 7 tokens per session scan A b3188d6c292f

Subscribe to this mod's changes

api-documenter is an agent published in the GitHub repository luongnv89/claude-howto (41,305 stars, last pushed 7d ago), licensed MIT. It adds 7 tokens to every session and 149 once invoked, about $0.0000 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 2026-08-30.