The World's Largest Book Database - ISBN Database | ISBNdb
The ISBNdb book database includes over 31 million unique ISBNs with up to 19 data points per book and is searchable via API. Retrieve book information from ISBN database on the go!
25
Basic
Agentic Readiness Score
+15 structured API
+5 AI robots
missing +25 llms.txt
Raise this score to 95+
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data
ai-friendlydatabaseapi
Agentic Signals
llms.txt
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ai-plugin.json
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OpenAPI Spec
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Structured API
Found
Allowed
Schema.org Markup
Found
MCP Server
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