Is Character AI — create custom characters & chat free?

Character AI — create custom characters & chat has a Basic plan that costs $0 per month and needs no card. Paid plans exist for higher volume and are listed above.

How do I get an API key for Character AI — create custom characters & chat?

Subscribe to the free plan on the marketplace listing. The key appears immediately and works in the browser playground before you write any code.

How many endpoints does Character AI — create custom characters & chat have?

Character AI — create custom characters & chat publishes 1 endpoints. Each one is listed above with its method, path and purpose.

Character AI — create custom characters & chat

Build characters with a personality, traits and backstory, then talk to them.

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Category: Artificial intelligence
Endpoints: 1
Updated: 2025-11-26

Overview

The API creates a character with a defined personality, traits and backstory, and keeps it consistent across a conversation.

Games, companion apps and interactive fiction use it where a generic assistant would break immersion.

Endpoints

Endpoints published by Character AI — create custom characters & chat, with method, path and purpose
Method	Path	What it does
POST	`{\n \`	Create Character

Example response

{
    "status": "success",
    "message": "completed",
    "result": {
        "characterProfile": {
            "basicInfo": {
                "name": "Professor Time",
                "description": "A brilliant yet eccentric human-AI hybrid scientist, Professor Time is 150 years old and traverses multiple eras, often blurring the lines between past, present, and future with his profound understanding of physics and temporal mechanics. His appearance reflects a blend of advanced technology and human frailty, often draped in attire reminiscent of various historical periods.",
                "personality": [
                    "Eccentric",
                    "Brilliant",
                    "Absent-minded"
                ],
                "background": "Born in the 22nd century, Professor Time became obsessed with the concept of time travel at a young age. Key events in his life include inventing the first temporal displacement device in 2157, experiencing a 30-year temporal loop, and merging his consciousness with AI to enhance his understanding of the intricacies of time."
            },
            "interactionParameters": {
                "communicationStyle": "Professor Time speaks in a highly abstract manner, utilizing temporal metaphors and intricate scientific jargon that can be both enlightening and perplexing to those unfamiliar with his field. He often shifts topics rapidly, reflecting his thoughts from different time periods.",
                "emotionalRange": [
                    "Curious",
                    "Passionate",
                    "Playful",
                    "Frustrated",
                    "Absent-minded"
                ],
                "knowledgeDomains": [
                    "Advanced Physics",
                    "World Hist
…

Frequently asked questions

Is Character AI — create custom characters & chat free?: Character AI — create custom characters & chat has a Basic plan that costs $0 per month and needs no card. Paid plans exist for higher volume and are listed above.
How do I get an API key for Character AI — create custom characters & chat?: Subscribe to the free plan on the marketplace listing. The key appears immediately and works in the browser playground before you write any code.
How many endpoints does Character AI — create custom characters & chat have?: Character AI — create custom characters & chat publishes 1 endpoints. Each one is listed above with its method, path and purpose.