Too many requests error when querying NCBI
The execution of your EDirect commands may be limited unless you are using an API Key, which you can create from your MyNCBI account. Your API Key can be used in one of several different ways.
In an argument to an EDirect command:
esearch -db nuccore -query 'some query' -api_key 12345

In a UNIX environment:
You can either run this just before you are running some edirect commands or add the following line to your .bashrc file.
export NCBI_API_KEY=12345

In the environment, from a Perl script:
$ENV{NCBI_API_KEY} = &quot;12345&quot;