# API Reference

Technical reference for OPSIIE.

## 📚 Documents

### [Command Reference](command-reference.md)
Complete command syntax and examples for all features.

### [Error Codes](error-codes.md)
Common errors and solutions.

## 🔑 Quick Reference

**All Users**: `/recall`, `/memorize`, `/voice`, `/imagine`, `/mail`, `/read`
**R-Grade**: `/ask`, `/markets`, `/dna`, `/0x`

## 📊 Access

**R-Grade**: ARPA ID R### (full access)
**A-Grade**: ARPA ID A### (core features only)

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**Technical reference.** 📚