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.
npx skills add cnfeat/top-pm-skills --skill api-docs-writergit clone --depth 1 https://github.com/cnfeat/top-pm-skillsWrote 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.
[](https://agentmods.dev/skills/cnfeat/top-pm-skills/api-docs-writer)<a href="https://agentmods.dev/skills/cnfeat/top-pm-skills/api-docs-writer"><img src="https://agentmods.dev/badge/skills/cnfeat/top-pm-skills/api-docs-writer/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.
<a href="https://agentmods.dev/skills/cnfeat/top-pm-skills/api-docs-writer"><img src="https://agentmods.dev/badge/skills/cnfeat/top-pm-skills/api-docs-writer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00062 | $0.01404 |
| Opus 5.5 | $0.00025 | $0.00562 |
| Sonnet 5.5 | $0.00012 | $0.00281 |
| Haiku 4.5 | $0.00006 | $0.00140 |
Grade B, and why
api-docs-writer scanned grade B with 2 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 1mo 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.
Sends data to an external URLmediumData exfiltration
A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.
response = requests.post( "https://api.example.com/v1/endpoint", Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -X POST https://api.example.com/v1/endpoint \ How it starts
The opening of the file, as written. The whole thing — 157 lines — stays where its author put it; the contents beside it link to each section on GitHub.
API Docs Writer Skill
This skill transforms raw API specs, endpoint descriptions, or Postman collections into clean, developer-facing documentation following OpenAPI-adjacent conventions. Output is ready for a developer portal, README, or Notion/Confluence page.
Required Inputs
Ask the user for these if not provided:
- API or endpoint details (raw spec, Postman export, or verbal description)
- Auth method (API key / Bearer token / OAuth 2.0 / None)
- Base URL
- API version (e.g. v1, v2.3, or "unversioned" — affects deprecation notes and versioning headers)
- Rate limits (requests per second/minute per token or IP, if known — or "unknown")
- Audience (internal developers / external partners / public)
- Output format (Markdown for developer portals and READMEs / Plain prose for Confluence or Notion — note: OpenAPI YAML is not produced by this skill)
Output Format
For each endpoint, produce the following:
[METHOD] /path/to/endpoint
Summary: [One line — what this endpoint does]
Description: [2–4 sentences. When to use this endpoint. What it returns. Any important behaviour to know (pagination, rate limits, async processing, etc.)]
Authentication: [Required / Optional — method]
Request
Headers:
| Header | Required | Description |
|---|---|---|
Authorization |
Yes | Bearer <token> |
Content-Type |
Yes | application/json |
Path Parameters:
| Parameter | Type | Required | Description |
|---|---|---|---|
id |
string | Yes | Unique identifier for the resource |
Query Parameters:
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
limit |
integer | No | 20 | Max results per page (1–100) |
cursor |
string | No | — | Pagination cursor from previous response |
Request Body:
{
"field_name": "value",
"another_field": 42
}
| Field | Type | Required | Description |
|---|---|---|---|
field_name |
string | Yes | [Plain description of what this field does] |
another_field |
integer | No | [Description. Include valid range or enum values if applicable] |
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.
- 1mo ago First seen · 157 lines · 62 tokens per session scan B d23556a256c1
api-docs-writer is a skill published in the GitHub repository cnfeat/top-pm-skills (55 stars, last pushed 4mo ago), licensed MIT. It adds 62 tokens to every session and 1,404 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it B with 2 findings (sends data to an external url, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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