Use Afterwren MCP with Windsurf (Devin Desktop)

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

Remote MCP server (Streamable HTTP), nothing to install. Free: 100 free calls/day · Paid: $5 pack; $19/mo; x402 $0.002/call

Set it up

In the Cascade panel, open the … (Actions) menu and click Open MCP config file in the MCPs section.
Add the server under "mcpServers" with "serverUrl" and save.
Check the MCPs section in Cascade for the server and its tools.
Ask Cascade a question the tools can answer.

Add to ~/.config/devin/mcp_config.json:

{
  "mcpServers": {
    "afterwren": {
      "serverUrl": "https://afterwren.cybermaxtools.com/mcp?via=use-with-windsurf"
    }
  }
}

With a paid key:

{
  "mcpServers": {
    "afterwren": {
      "serverUrl": "https://afterwren.cybermaxtools.com/mcp?via=use-with-windsurf",
      "headers": {
        "x-api-key": "YOUR_KEY"
      }
    }
  }
}

Keep this file out of shared folders and repositories if it holds a key.

Where it goes:

~/.config/devin/mcp_config.json (macOS and Linux)
%APPDATA%\devin\mcp_config.json (Windows)

Config format checked 2026-10-09 against Windsurf (Devin Desktop)'s MCP documentation.

Tools you get

Endpoint checked 2026-10-09: https://afterwren.cybermaxtools.com/mcp answered an MCP initialize (protocol 2025-06-18) and tools/list with 7 tools, all marked read-only. No key was used and no tool was called.

Tool	What it does	Required inputs
`company_suggest`	Company name or prefix to a list of {name, domain, logo, description}, best-known first (Clearbit Autocomplete replacement).	`query`
`company_logo`	The best logo/icon URL for a domain from the company's own site, with alternatives (Clearbit Logo replacement).	`domain`
`company_profile`	Name, description, logo, social links, email provider (MX/SPF) and Wikidata facts (founded, HQ, industry, employees, ticker) for a domain.	`domain`
`geocode`	Address or place to lat/lng with city, state, postal, country; US results include county, tract and block FIPS.	`q`
`reverse_geocode`	Coordinates to the nearest address and, in the US, county/tract/block FIPS.	`lat`, `lng`
`book_search`	Books by title/author or ISBN: authors, year, ISBNs, pages, rating, cover (Goodreads API replacement, Open Library data).	none
`encyclopedia_search`	Wikipedia full-text search: titles, URLs and snippets (for grounding after the Bing Search API retirement).	`q`

Test the endpoint from a terminal

This lists the tools without a key and without calling any of them:

curl -s https://afterwren.cybermaxtools.com/mcp \
  -H 'content-type: application/json' \
  -H 'accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

If it does not work

Windsurf's documentation (docs.windsurf.com) now redirects to Devin Desktop's at docs.devin.ai; these steps follow that page.
The documented remote field is "serverUrl" (the docs say "url" is also accepted).
The free tier has a daily limit (see the pricing line above); a paid key raises it.

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