MCP server · CyberMax

Afterwren MCP server

Retired-API replacements: Clearbit-style company autocomplete, logos, profiles; geocoding; books.

Free: 100 free calls/dayPaid: $5 pack; $19/mo; x402 $0.002/call

Connect

Streamable HTTP endpoint: https://afterwren.cybermaxtools.com/mcp (the original https://afterwren.cybermax-tools.workers.dev/mcp keeps working). Add it to Claude Desktop, Cursor, Windsurf or VS Code:

{
  "mcpServers": {
    "afterwren": {
      "type": "http",
      "url": "https://afterwren.cybermaxtools.com/mcp"
    }
  }
}

No key needed for the free tier. For more calls, add your paid key as the x-api-key header. Full API docs: https://afterwren.cybermaxtools.com/docs · Product page: Afterwren

Tools

Tool	What it does	Effect	Inputs (* required)
`company_suggest`	Company name or prefix to a list of {name, domain, logo, description}, best-known first (Clearbit Autocomplete replacement).	read-only, calls public sources on the internet, never destructive	`query`*
`company_logo`	The best logo/icon URL for a domain from the company's own site, with alternatives (Clearbit Logo replacement).	read-only, calls public sources on the internet, never destructive	`domain`*
`company_profile`	Name, description, logo, social links, email provider (MX/SPF) and Wikidata facts (founded, HQ, industry, employees, ticker) for a domain.	read-only, calls public sources on the internet, never destructive	`domain`*
`geocode`	Address or place to lat/lng with city, state, postal, country; US results include county, tract and block FIPS.	read-only, calls public sources on the internet, never destructive	`q`*, `country`
`reverse_geocode`	Coordinates to the nearest address and, in the US, county/tract/block FIPS.	read-only, calls public sources on the internet, never destructive	`lat`, `lng`
`book_search`	Books by title/author or ISBN: authors, year, ISBNs, pages, rating, cover (Goodreads API replacement, Open Library data).	read-only, calls public sources on the internet, never destructive	`q`, `isbn`, `limit`
`encyclopedia_search`	Wikipedia full-text search: titles, URLs and snippets (for grounding after the Bing Search API retirement).	read-only, calls public sources on the internet, never destructive	`q`*, `limit`

Security and data handling

Your tool arguments are used only to answer that call. They are not saved to a database, shared, sold or used for training.
To make repeat lookups fast, some servers keep the public answer to a lookup in Cloudflare's edge cache for up to 7 days (most for 1 hour or less). It holds the public result, not who asked.
Free tier: a per-day counter keyed by a SHA-256 hash of your IP address and the date (in a Cloudflare Durable Object). The raw IP is not stored.
Paid key: the key is checked with the payment provider (Stripe; Polar for older keys) and the result is cached for 10 minutes; usage is counted per key per month.
No accounts, cookies or tracking on the MCP endpoint. Errors may appear in Cloudflare's short-lived Worker logs.
Every tool is read-only: it looks up public data and returns it. No tool writes, deletes, sends messages or spends money.

Registry and source

Official MCP Registry: dev.workers.cybermax-tools.cybermax/afterwren, version 1.1.0.
Public manifest, tool schemas and security notes (MIT): gitlab.com/CyberMax.tools/agent-tools/mcp/afterwren. The hosted service code is not public.
Report a vulnerability: security policy.

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