An example of "/metadata" output from MyGene.info

metadata_mygene_info.json

{
  "app_revision": "193:7417080ffb37",
  "available_fields": [
    "accession",
    "alias",
    "biocarta",
    "chr",
    "end",
    "ensemblgene",
    "ensemblprotein",
    "ensembltranscript",
    "entrezgene",
    "exons",
    "flybase",
    "generif",
    "go",
    "hgnc",
    "homologene",
    "hprd",
    "humancyc",
    "interpro",
    "ipi",
    "kegg",
    "mgi",
    "mim",
    "mirbase",
    "mousecyc",
    "name",
    "netpath",
    "pdb",
    "pfam",
    "pharmgkb",
    "pid",
    "pir",
    "prosite",
    "ratmap",
    "reactome",
    "reagent",
    "refseq",
    "reporter",
    "retired",
    "rgd",
    "smpdb",
    "start",
    "strand",
    "summary",
    "symbol",
    "tair",
    "taxid",
    "type_of_gene",
    "unigene",
    "uniprot",
    "wikipathways",
    "wormbase",
    "xenbase",
    "yeastcyc",
    "zfin"
  ],
  "genome_assembly": {
    "fruitfly": "dm3",
    "rat": "rn4",
    "nematode": "ce10",
    "human": "hg38",
    "zebrafish": "zv9",
    "mouse": "mm10",
    "frog": "xenTro3",
    "pig": "susScr2"
  },
  "source": "genedoc_mygene_allspecies_20140907_fmdzcpbi",
  "src_version": {
    "ucsc": "20140901",
    "netaffy": "na33",
    "uniprot": "20140904",
    "pharmgkb": "20140904",
    "ensembl": 76,
    "cpdb": 28,
    "entrez": "20140906"
  },
  "stats": {
    "total_genes": 17109890,
    "total_ensembl_only_genes": 853821,
    "total_ensembl_genes": 1570101,
    "total_entrez_genes": 16256069,
    "total_ensembl_genes_mapped_to_entrez": 716280,
    "total_species": 14238
  },
  "taxonomy": {
    "fruitfly": 7227,
    "rat": 10116,
    "nematode": 6239,
    "thale-cress": 3702,
    "human": 9606,
    "zebrafish": 7955,
    "mouse": 10090,
    "frog": 8364,
    "pig": 9823
  },
  "timestamp": "2014-09-08T00:57:27.791000"
}