This is a simple tool that will directly connect to crt.sh's PostgreSQL server and dump all subdomains related to a company through that. This has some benefits over the traditional method of querying crt.sh's API, such as not having random timeouts and having no limits on output size.
go install github.com/c3l3si4n/quickcert@v0.0.2
echo att.com | quickcert
$ claude mcp add quickcert \
-- python -m otcore.mcp_server <graph>