Character.AI website screenshot

Character.AI

Character.AI is a consumer conversational-AI platform that lets users create and chat with AI personas (Characters) via web and mobile apps. Character.AI does not publish a public developer API; product surfaces are accessed through the consumer apps. Community-maintained reverse-engineered clients exist but are unofficial and unsupported.

Character.AI is profiled on the APIs.io network. Tagged areas include Artificial Intelligence, LLM, Chatbots, Personas, and Generative AI.

Character.AI’s developer surface includes documentation, engineering blog, and 7 more developer resources.

🌐 Visit website📡 Profile data on GitHub
8.3/100 minimal ▬ flat Agent 1/100 human only Front door AI 4/6 moderate Heartbeat 78/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →
AccessFreemium
0 APIs
Artificial IntelligenceLLMChatbotsPersonasGenerative AIConsumerConversational AI

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0
Composite quality — 8.3/100 · minimal
Contract Quality 0.0 / 21
Developer Ergonomics 2.0 / 17
Access Clarity 1.3 / 17
Operational Transparency 1.2 / 11
Contract Governance 0.0 / 10
Discoverability 4.1 / 9
Regulatory Posture 0.8 / 15
Agent readiness — 1/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
Pagination 5 / 5
Distinct Operations 3 / 3
MCP Tool Quality 6 / 6
Regulatory Posture applies to this provider. Its tags matched the AI & Biometrics regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
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Agent readiness — checks not met, largest first (exact, from this profile):
  • Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
  • MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
  • Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
  • Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
  • Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
  • Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
12 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/character-ai/apis.yml: open an issue on github.com/api-evangelist/character-ai to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Character.AI API pricing

Not yet checked against Character.AI's own pricing page. Compiled by API Evangelist on 2026-05-08 from character.ai/; confirm before you rely on a figure. A free plan or tier is listed.

PlanPrice
Free free Free
c.ai+ (Plus) subscription —
Public Developer API usage —

Plan details, limits and sources →

Rate limits

Compiled by API Evangelist, not yet checked against Character.AI's documentation. Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

Character Ai Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Character Ai Rate Limits

3 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Character Ai Finops

FINOPS

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Character Ai Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans
Plans
 FinOps
FinOps

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: character-ai
url: https://raw.githubusercontent.com/api-evangelist/character-ai/refs/heads/main/apis.yml
name: Character.AI
kind: company
description: Character.AI is a consumer conversational-AI platform that lets users create and chat with AI personas (Characters)
  via web and mobile apps. Character.AI does not publish a public developer API; product surfaces are accessed through the
  consumer apps. Community-maintained reverse-engineered clients exist but are unofficial and unsupported.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/character-ai.png
x-docs-platform: gitbook
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-09-21
tags:
- Artificial Intelligence
- LLM
- Chatbots
- Personas
- Generative AI
- Consumer
- Conversational AI
tags_raw:
- AI
- LLM
- Chatbots
- Personas
- Generative AI
- Consumer
- Conversational AI
created: '2026-05-08'
modified: '2026-07-25'
specificationVersion: '0.23'
apis: []
common:
- type: DomainSecurity
  url: security/character-ai-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/character-ai
- type: LinkedIn
  url: https://www.linkedin.com/company/character-ai
- type: Website
  url: https://character.ai/
- type: Documentation
  url: https://book.character.ai/
- type: Plans
  url: plans/character-ai-plans-pricing.yml
- type: RateLimits
  url: rate-limits/character-ai-rate-limits.yml
- type: FinOps
  url: finops/character-ai-finops.yml
- url: https://blog.character.ai/feed
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Character.AI API — frequently asked questions

How much does the Character.AI API cost?

APIs.io lists 3 pricing plans for Character.AI, with each plan's price, limits and inclusions under Pricing on this page.

Is the Character.AI API ready for AI agents?

Character.AI has a Kin Score of 8.3 out of 100 (minimal) and an Agent Readiness score of 0.6 (human-only), scored by API Evangelist on 2026-11-06.

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