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 agentmods add skills/arabold/docs-mcp-server/fetch-urlnpx skills add arabold/docs-mcp-server --skill fetch-urlgit clone --depth 1 https://github.com/arabold/docs-mcp-serverWrote 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/arabold/docs-mcp-server/fetch-url)<a href="https://agentmods.dev/skills/arabold/docs-mcp-server/fetch-url"><img src="https://agentmods.dev/badge/skills/arabold/docs-mcp-server/fetch-url.svg" alt="Measured on agentmods" 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 | $0.00045 | $0.00749 |
| Opus 5 | $0.00023 | $0.00375 |
| Sonnet 5 | $0.00009 | $0.00150 |
| Haiku 4.5 | $0.00005 | $0.00075 |
Grade A, and why
fetch-url 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 4d 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.
How it starts
The opening of the file, as written. The whole thing — 84 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Fetch URL
Fetch a single URL and convert its content to clean Markdown. This does not add anything to the documentation index; it is a one-shot read operation.
When to use
- You need to read a single web page and get its content as Markdown.
- You want to inspect a documentation page before deciding whether to index it.
- You need the raw text of a URL for summarisation or analysis.
If you need to index the content for repeated searching, use the docs-manage
skill (scrape command) instead.
Command
npx @arabold/docs-mcp-server@latest fetch-url <url> [options]
| Flag | Default | Description |
|---|---|---|
--follow-redirects |
true |
Follow HTTP redirects |
--no-follow-redirects |
Disable following redirects | |
--scrape-mode auto|fetch|playwright |
auto |
HTML processing strategy |
--header "Name: Value" |
Custom HTTP header (repeatable) | |
--quiet |
Suppress non-error diagnostics | |
--verbose |
Enable debug logging |
Scrape modes
| Mode | When to use |
|---|---|
auto |
Default. Tries a simple HTTP fetch first, falls back to Playwright for JS-rendered pages. |
fetch |
Force a plain HTTP fetch. Fastest, but misses content rendered by JavaScript. |
playwright |
Force a headless browser. Use for SPAs or pages that require JavaScript to render. |
Examples
# Fetch a documentation page
npx @arabold/docs-mcp-server@latest fetch-url https://react.dev/reference/react/useEffect
# Fetch with custom auth header
npx @arabold/docs-mcp-server@latest fetch-url https://docs.internal.com/api \
--header "Authorization: Bearer tok_xxx"
# Force Playwright for a JS-heavy page
npx @arabold/docs-mcp-server@latest fetch-url https://some-spa.dev/docs --scrape-mode playwright
# Disable redirect following
npx @arabold/docs-mcp-server@latest fetch-url https://example.com/old-page --no-follow-redirects
Output
The command writes the converted Markdown text directly to stdout. The
global --output flag is accepted but has no effect because the result is
already plain text, not structured data.
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.
- 4d ago First seen · 84 lines · 45 tokens per session scan A d4c068a66688
fetch-url is a skill published in the GitHub repository arabold/docs-mcp-server (1,707 stars, last pushed 5d ago), licensed MIT. It adds 45 tokens to every session and 749 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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