A (mostly correct) scraped import of SRD monsters from https://www.13thagesrd.com/monsters/ for https://gitlab.com/asacolips-projects/foundry-mods/archmage/tree/master provided under the Open Game License
Nearly 400 monsters is too many for me to review by hand, although I've done the best I can. Please report any data issues as a Github Issue. Thanks!
Recommended: Using FoundryGet
foundryget install https://raw.githubusercontent.com/cswendrowski/FoundryVTT-Mageflame-SRD/releases/download/latest/module.json
https://foundryvtt.com/packages/13th-mageflame-monsters/