Prologue

Prologue (Prologue AI) is a multimodal creative operating system that lets teams create, edit, and organize AI-generated images, video, audio, and text in a single workspace. Powered by "Prologue Intent" and a best-in-class catalog of third-party generative models, it targets professional creative workflows for agencies and brands ("crafted, not generated"). It was surfaced as an a16z portfolio company and added to the API Evangelist network as a stub for enrichment. As of this pass no public developer API, documentation, or SDK surface was discoverable — the product site is a consumer/pro web application behind bot protection.

Prologue is profiled on the APIs.io network. Tagged areas include Company, Artificial Intelligence, Generative AI, Creative Tools, and Content Creation.

Prologue’s developer surface includes pricing, engineering blog, and 3 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

10.8/100 minimal ▬ flat Agent 0/100 human only Front door AI 6/6 dominant Heartbeat 82/100 alive Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemium

0 APIs

Company Artificial Intelligence Generative AI Creative Tools Content Creation Multi-Modal Media

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 10.8/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.4 / 17

Access Clarity 6.3 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.1 / 9

Regulatory Posture 0.8 / 15

Agent readiness — 0/100 · 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 0 / 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

13 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 2.4 — up to +19.5 composite points
Operational Transparency scores 0.0 — up to +13.0 composite points

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/prologue/apis.yml: open an issue on github.com/api-evangelist/prologue 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 →

Prologue API pricing

Prices published by Prologue, read 2026-10-07 from prologue.ai/plans.

Plan	Price
Free	$0 Includes: 150 credits (one-time); 150 credits at signup + 150 credits when you install the app
Lite	CAD $14/ month Includes: 1,000 credits/month
Creator	CAD $39/ month Includes: 4,000 credits/month ($ 9.75 per 1,000 credits)
Professional	CAD $99/ month Includes: 12,000 credits/month ($ 8.25 per 1,000 credits)
Business	CAD $272/ month Includes: 32,000 credits / month; $ 8.50 CAD per 1,000 credits; up to 50 seats
Enterprise	Custom Includes: Custom allocation

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Prologue Plans Pricing

6 plans

PLANS

Security Posture 1

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

Prologue Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 2

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

Company 2

The organization behind the API

Blog

Blog

Website

Website

Source (apis.yml)

aid: prologue
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  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/prologue.png
name: Prologue
description: Prologue (Prologue AI) is a multimodal creative operating system that lets teams create, edit, and organize AI-generated
  images, video, audio, and text in a single workspace. Powered by "Prologue Intent" and a best-in-class catalog of third-party
  generative models, it targets professional creative workflows for agencies and brands ("crafted, not generated"). It was
  surfaced as an a16z portfolio company and added to the API Evangelist network as a stub for enrichment. As of this pass
  no public developer API, documentation, or SDK surface was discoverable — the product site is a consumer/pro web application
  behind bot protection.
url: https://raw.githubusercontent.com/api-evangelist/prologue/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
tags:
- Company
- Artificial Intelligence
- Generative AI
- Creative Tools
- Content Creation
- Multi-Modal
- Media
tags_raw:
- Company
- Artificial Intelligence
- Generative AI
- Creative Tools
- Content Creation
- Multimodal
- Media
apis: []
common:
- type: Pricing
  url: https://prologue.ai/plans
- type: Plans
  url: plans/prologue-plans-pricing.yml
- url: https://prologue.ai/blog
  type: Blog
- type: DomainSecurity
  url: security/prologue-domain-security.yml
- type: Website
  url: https://prologue.ai/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-20'
  status: minimal
  artifacts_added: 1
  pass: local-v1

Prologue API — frequently asked questions

How much does the Prologue API cost?

Prologue publishes its prices; its Free plan is $0 as of 2026-10-07. APIs.io lists 6 pricing plans for Prologue, with each plan's price, limits and inclusions under Pricing on this page.

Is the Prologue API ready for AI agents?

Prologue has a Kin Score of 10.8 out of 100 (minimal) and an Agent Readiness score of 0.0 (human-only), scored by API Evangelist on 2026-11-06.

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