Single Player Commands for Player API Mod

The Single Player Commands for Player API patch integrates the Single Player Commands mod into the Player API mod By installing this patch, SPC gains
The Single Player Commands for Player API patch integrates the Single Player Commands mod into the Player API mod By installing this patch, SPC gains basic compatibility to all mods that depend on the Player API mod. The Single Player Commands for PlayerAPI patch provides full SPC functionality without simply replacing the file “iq.class”. Instead

Minecraft: How to Install Single Player Commands MOD [Will work for future updates!]

Create a Custom NPC

Single Player Commands Mod for Minecraft 1.6.4

Flans Mod for Minecraft PC : Full Guide for Commands and Instructions by Peter Parker

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Player API Mod 1.16.3-1.12.2-1.7.10 - Client, server, and bukkit Minecraft

NPC Dialogue Command

✓ [API] Player NPC ✓ [1.17 - 1.20.1]

How to get and use Pehkui mod for Minecraft Java Edition