added logo with OpenClaw while driving

Number Adder

Multi-tenant calculators with organization-based access control.

Hosted

Cloud

Use instantly with no setup. Create organizations, invite members, and keep calculator access scoped by role.

Open Source

Self-Hosted

Run the multi-tenant server on your own infrastructure and connect any client you want.

pip install number-adder
number-adder-server

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Why build Number Adder? Because when people evaluated vanna.ai (20K ⭐ on GitHub), they got so distracted by OAuth, tenant isolation, GDPR, API, CLI, and open source that we joked they might not notice if the product only added two numbers.