NovelAI

NovelAI is a monthly subscription service for AI-assisted image generation, storytelling, or simply a LLM powered sandbox for your imagination.

NovelAI publishes 5 APIs on the APIs.io network, including /ai/ API, /ai/module/ API, / API, and 2 more. Tagged areas include Artificial Intelligence, Image-Generation, LLM, and Storytelling.

NovelAI’s developer surface includes authentication and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub

23.1/100 emerging ▬ flat Agent 26/100 agent aware Full breakdown ↓
scored 2026-08-25 · rubric v0.14.0

AccessFreemiumSelf serve⚡ Free to try

6 APIs

Artificial Intelligence Image-Generation LLM Storytelling

Kin Score

Kin Score How this is scored →
scored 2026-08-25 · rubric v0.14.0

Composite quality — 23.1/100 · emerging

Contract Quality 11.5 / 25

Developer Ergonomics 2.4 / 20

Access Clarity 3.2 / 20

Operational Transparency 1.4 / 13

Contract Governance 0.0 / 12

Discoverability 4.6 / 10

Agent readiness — 26/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 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 Surface 0 / 5

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/novelai: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 6

Individual APIs this provider publishes, each with its own machine-readable definition.

NovelAI API

NovelAI API provides programmatic access to AI image generation and text generation capabilities.

NovelAI /ai/ API

The /ai/ API from NovelAI — 9 operation(s) for /ai/.

NovelAI /ai/module/ API

The /ai/module/ API from NovelAI — 3 operation(s) for /ai/module/.

NovelAI / API

The / API from NovelAI — 1 operation(s) for /.

NovelAI /user/ API

The /user/ API from NovelAI — 28 operation(s) for /user/.

NovelAI /user/subscription/ API

The /user/subscription/ API from NovelAI — 2 operation(s) for /user/subscription/.

Open Collections 7

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

NovelAI Primary /ai/ /ai/ /ai/ API

OPEN COLLECTION

NovelAI Primary /ai/ /ai/ /ai/module/ API

OPEN COLLECTION

NovelAI Primary /ai/ /ai/ / API

OPEN COLLECTION

NovelAI Primary /ai/ /ai/ /user/ API

OPEN COLLECTION

NovelAI Primary /ai/ /ai/ /user/subscription/ API

OPEN COLLECTION

NovelAI Primary API

OPEN COLLECTION

Scroll for all 7

Pricing Plans 1

Published pricing tiers and plan structures.

Novelai Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Novelai Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Novelai Finops

FINOPS

Security Posture 3

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

Novelai Authentication

http · 1 scheme

SECURITY

Novelai Domain Security

TLSv1.3

SECURITY

Novelai Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Novelai Agentic Access

52 operations · 35 acting · 35 human-in-the-loop

52 operations · 35 acting

AGENTIC

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Company 2

The organization behind the API

LinkedIn

Website

Website

Source (apis.yml)

aid: novelai
name: NovelAI
description: NovelAI is a monthly subscription service for AI-assisted image generation, storytelling, or simply a LLM powered
  sandbox for your imagination.
type: Index
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/novelai.png
tags:
- Artificial Intelligence
- Image-Generation
- LLM
- Storytelling
tags_raw:
- AI
- Image Generation
- LLM
- Storytelling
url: https://raw.githubusercontent.com/api-evangelist/novelai/refs/heads/main/apis.yml
created: '2024-07-02'
modified: '2026-04-28'
specificationVersion: '0.23'
apis:
- aid: novelai:novelai
  name: NovelAI API
  description: NovelAI API provides programmatic access to AI image generation and text generation capabilities.
  humanURL: https://api.novelai.net/docs/
  tags:
  - Artificial Intelligence
  - Image-Generation
  - LLM
  tags_raw:
  - AI
  - Image Generation
  - LLM
  properties:
  - type: Documentation
    url: https://api.novelai.net/docs/
- aid: novelai:novelai-ai-api
  name: NovelAI /ai/ API
  description: The /ai/ API from NovelAI — 9 operation(s) for /ai/.
  humanURL: https://api.novelai.net/docs/
  tags:
  - Artificial Intelligence
  tags_raw:
  - /ai/
  properties:
  - type: OpenAPI
    url: openapi/novelai-ai-api-openapi.yml
- aid: novelai:novelai-ai-module-api
  name: NovelAI /ai/module/ API
  description: The /ai/module/ API from NovelAI — 3 operation(s) for /ai/module/.
  humanURL: https://api.novelai.net/docs/
  tags: []
  tags_raw:
  - /ai/module/
  properties:
  - type: OpenAPI
    url: openapi/novelai-ai-module-api-openapi.yml
- aid: novelai:novelai-default-api
  name: NovelAI / API
  description: The / API from NovelAI — 1 operation(s) for /.
  humanURL: https://api.novelai.net/docs/
  tags: []
  tags_raw:
  - /
  properties:
  - type: OpenAPI
    url: openapi/novelai-default-api-openapi.yml
- aid: novelai:novelai-user-api
  name: NovelAI /user/ API
  description: The /user/ API from NovelAI — 28 operation(s) for /user/.
  humanURL: https://api.novelai.net/docs/
  tags:
  - User
  tags_raw:
  - /user/
  properties:
  - type: OpenAPI
    url: openapi/novelai-user-api-openapi.yml
- aid: novelai:novelai-user-subscription-api
  name: NovelAI /user/subscription/ API
  description: The /user/subscription/ API from NovelAI — 2 operation(s) for /user/subscription/.
  humanURL: https://api.novelai.net/docs/
  tags:
  - User Subscription
  tags_raw:
  - /user/subscription/
  properties:
  - type: OpenAPI
    url: openapi/novelai-user-subscription-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/novelai-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/novelai-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/novelai-domain-security.yml
- type: Authentication
  url: authentication/novelai-authentication.yml
- type: GitHubOrganization
  url: https://github.com/NovelAI
- type: LinkedIn
  url: https://www.linkedin.com/company/novelaitechnologies
- type: Website
  url: https://novelai.net/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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