Monstro.cc

A comprehensive OSR monster bestiary tracking creatures across multiple sourcebooks and systems.

Bestiary Statistics

Unique Monsters

Total Statblocks

Available Sourcebooks

Basic Fantasy Role-Playing Game (BFRPG)
Old-School Essentials Classic Fantasy (OSE)
OSRIC (OSRIC)

About

Monstro.cc helps you track and compare OSR monsters across different sourcebooks and retroclones. Each monster entry shows:

Full stat blocks from public sources (SRDs, OGL content)
Cross-references to other sourcebooks where the monster appears
Structured data using JSON-LD for semantic web compatibility

JSON API Access

All pages on Monstro.cc provide JSON output for programmatic access. Simply add index.json to any URL:

# Get all monsters

curl https://monstro.cc/monster/index.json

# Get a specific monster

curl https://monstro.cc/monster/blink-dog/index.json

# Get all 4 HD monsters

curl https://monstro.cc/hitdice/4/index.json

# Get monsters by tag

curl https://monstro.cc/tags/undead/index.json

# Get a sourcebook's monsters

curl https://monstro.cc/sourcebook/ose-classic-fantasy/index.json

Individual monster pages also include JSON-LD structured data embedded in the HTML, making them compatible with semantic web tools and search engines.