What is mcp AGENTS.md?

Instructions for the FourA MCP server, which fetches public web pages, APIs, JavaScript-rendered sites, and pages protected by anti-bot checks. It provides four read-only fetching methods, including direct requests, proxies, and browser sessions.

Use it to retrieve public web content with automatic method selection or with explicit control over HTTP, proxy, and browser requests.

It explains which fetching method to try when a normal web request is incomplete, blocked, or cannot run JavaScript.

mcp AGENTS.md — Instructions file by fouradata

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 instructions/fouradata/mcp/agents-md

Clone the repo

git clone --depth 1 https://github.com/fouradata/mcp

Made for: Codex, OpenCode.

Per session 648 This file is loaded in full into every session.

When invoked 648 The same file — it is already loaded in full.

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.

Model	Per session	Once invoked
Fable 5	$0.00648	$0.00648
Opus 5	$0.00324	$0.00324
Sonnet 5	$0.00130	$0.00130
Haiku 4.5	$0.00065	$0.00065

Measured yesterday against content hash 9c88d3698144, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

mcp AGENTS.md 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 yesterday.

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.

AGENTS.md · 55 lines

How it starts

The opening of the file, as written. The whole thing — 55 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Agent-facing reference for the FourA MCP server (@fouradata/mcp). If you are an AI agent deciding whether and how to use this server, read this.

What this server does

Fetches arbitrary public web pages for you: static pages, JSON APIs, JavaScript-rendered SPAs, and anti-bot-protected targets. It wraps the FourA web scraping API. All tools are read-only (readOnlyHint: true) and reach the open web (openWorldHint: true).

Tools (four)

foura_auto - the default. Give it a url; it returns the content and picks the fetch method for you. Use this first unless you need explicit control. Optional validate.data.accept lets it tell a real page from a challenge page.
foura_single - one fast HTTP request. Static pages and JSON APIs. A full browser header set is sent by default (unblocker); set browser, os, or version when a target refuses the default Chrome.
foura_proxy - the same request through a rotating proxy pool with retry. Use when a direct request is blocked; difficult protected targets may need maxTries: 25-30. The inner request takes the same browser-profile fields.
foura_browser - a real browser session; JavaScript runs and the DOM finishes rendering. Use for SPAs and lazy-loaded content.

The primitives compose: foura_proxy returns a base36 proxy ID; pass it into foura_single.proxy or foura_browser.proxy to reuse the same exit.

Prompts (six)

smart_fetch, scrape_product_page, extract_article, monitor_pricing, check_endpoint_health, bulk_fetch_urls. Each expands into a templated task that orchestrates the tools for you.

Errors

Every error carries a structuredContent envelope with {service, code, error} and, where relevant, status / retryAfter. Read code for retry logic: rate_limited, at_capacity, service_unavailable, upstream_error are retry-safe (respect retryAfter); auth_failed, bad_request, not_found, ssrf_blocked are not. Full list: https://foura.ai/docs/mcp/errors.

Read the full file on GitHub · 55 lines

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.

yesterday First seen · 55 lines · 648 tokens per session scan A 9c88d3698144

Subscribe to this mod's changes

mcp AGENTS.md is an instructions file published in the GitHub repository fouradata/mcp (4 stars, last pushed 12d ago), licensed MIT. It adds 648 tokens to every session, about $0.0032 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 2026-08-31.

Browser automation Data and AI Writing and docs ai-agents claude mcp model-context-protocol typescript web-scraping

mcp AGENTS.md

Getting it into your agent

What it costs to keep this loaded

Grade A, and why

Nothing flagged

How it starts

AGENTS.md

What this server does

Tools (four)

Prompts (six)

Errors

What this file has done since we first saw it

Other instructions, from other repositories

BraveMCP CLAUDE.md

helm CLAUDE.md

qutebrowser-mcp CLAUDE.md

OneJS AGENTS.md

AutomatiQ AGENTS.md

ketch CLAUDE.md