I have a long list of species names.

 I was wondering whether a tool was available online, which could fetch the NCBI IDs? 
try [taxonkit](https://github.com/shenwei356/taxonkit), providing single binary files for Windows/Linux. It's really fast.

    $ cat names.txt 
    Homo sapiens
    Akkermansia muciniphila ATCC BAA-835
    Akkermansia muciniphila
    Mouse Intracisternal A-particle
    Wei Shen
    uncultured murine large bowel bacterium BAC 54B
    Croceibacter phage P2559Y

    $ time taxonkit name2taxid names.txt
    [INFO] parsing names file: /home/shenwei/.taxonkit/names.dmp
    [INFO] 1587755 names parsed
    Homo sapiens    9606
    Akkermansia muciniphila ATCC BAA-835    349741
    Akkermansia muciniphila 239935
    Mouse Intracisternal A-particle 11932
    Wei Shen
    uncultured murine large bowel bacterium BAC 54B 314101
    Croceibacter phage P2559Y       1327037
    
    real    0m7.217s
    user    0m10.682s
    sys     0m0.471s

    $ time taxonkit name2taxid names.txt | taxonkit lineage -i 2
    Homo sapiens    9606    cellular organisms;Eukaryota;Opisthokonta;Metazoa;Eumetazoa;Bilateria;Deuterostomia;Chordata;Craniata;Vertebrata;Gnathostomata;Teleostomi;Euteleostomi;Sarcopterygii;Dipnotetrapodomorpha;Tetrapoda;Amniota;Mammalia;Theria;Eutheria;Boreoeutheria;Euarchontoglires;Primates;Haplorrhini;Simiiformes;Catarrhini;Hominoidea;Hominidae;Homininae;Homo;Homo sapiens
    Akkermansia muciniphila ATCC BAA-835    349741  cellular organisms;Bacteria;PVC group;Verrucomicrobia;Verrucomicrobiae;Verrucomicrobiales;Akkermansiaceae;Akkermansia;Akkermansia muciniphila;Akkermansia muciniphila ATCC BAA-835
    ...
    
    real    0m13.151s
    user    0m23.251s
    sys     0m0.948s

