ContentIn

ContentIn provides an AI-powered LinkedIn ghostwriter that creates and schedules posts for founders and professionals. The platform learns a user’s voice from existing LinkedIn content and generates tailored posts, offering tools like idea manager, post scheduler, analytics, and image creation. It aims to streamline content creation, improve engagement, and continuously refine output through user feedback, with a free trial and paid plans starting at $39 per month.

ContentIn is listed with 1 API on the APIs.io network. Tagged areas include Artificial Intelligence, LinkedIn, Ghostwriter, Content Creation, and Software-as-a-Service.

ContentIn’s developer surface includes authentication, getting-started guide, pricing, engineering blog, and 9 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

22.1/100 emerging Agent 25/100 agent aware Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 API

Artificial Intelligence LinkedInGhostwriterContent Creation Software-as-a-Service Company

Kin Score

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

Composite quality — 22.1/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 4.5 / 17

Access Clarity 8.9 / 17

Operational Transparency 0.6 / 11

Contract Governance 0.0 / 10

Discoverability 4.9 / 9

Regulatory Posture 2.2 / 15

Agent readiness — 25/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 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 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 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 Horizontal (data, software, accessibility, platform) 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
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

7 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 26.2 — up to +14.8 composite points
Operational Transparency scores 5.3 — up to +12.3 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/contentin-io/apis.yml: open an issue on github.com/api-evangelist/contentin-io 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 →

Standards implemented 3

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

APIs 1

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

ContentIn API

ContentIn provides AI-powered LinkedIn ghostwriter tools accessible via a developer portal.

ContentIn API pricing

Prices published by ContentIn, read 2026-11-04 from contentin.io/#pricing.

Plan	Price
ContentIn	$39/month
Pro	$48/month
Growth	$31/month

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Contentin Io Plans Pricing

3 plans

PLANS

Security Posture 2

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

Contentin Io Authentication

2 schemes

SECURITY

Contentin Io Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Roadmap

Roadmap

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

Pricing

Pricing

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: contentin-io
name: ContentIn
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  probe_state: unreadable
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://contentin.io/share-image.png
description: ContentIn provides an AI-powered LinkedIn ghostwriter that creates and schedules posts for founders and professionals.
  The platform learns a user’s voice from existing LinkedIn content and generates tailored posts, offering tools like idea
  manager, post scheduler, analytics, and image creation. It aims to streamline content creation, improve engagement, and
  continuously refine output through user feedback, with a free trial and paid plans starting at $39 per month.
url: https://artifacts.apis.io/contentin-io/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-04 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-04'
modified: '2026-11-04'
tags:
- Artificial Intelligence
- LinkedIn
- Ghostwriter
- Content Creation
- Software-as-a-Service
- Company
tags_raw:
- AI
- LinkedIn
- Ghostwriter
- Content Creation
- SaaS
- Company
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/contentin-io-plans-pricing.yml
- type: Authentication
  url: authentication/contentin-io-authentication.yml
- type: LLMsTxt
  url: llms/contentin-io-llms.txt
- type: WellKnown
  url: well-known/contentin-io-well-known.yml
- type: Hosts
  url: hosts/contentin-io-hosts.yml
- type: Vendors
  url: vendors/contentin-io-vendors.yml
- type: DomainSecurity
  url: security/contentin-io-domain-security.yml
- type: Website
  url: https://contentin.io/
- type: GettingStarted
  url: https://contentin.io/ai-linkedin-post-generator/
- type: Pricing
  url: https://contentin.io/#pricing
- type: Blog
  url: https://contentin.io/blog/
- type: Roadmap
  url: https://contentin.io/roadmap/
- type: PrivacyPolicy
  url: https://www.iubenda.com/privacy-policy/58097432
apis:
- name: ContentIn API
  description: ContentIn provides AI-powered LinkedIn ghostwriter tools accessible via a developer portal.
  humanURL: https://contentin.io/
  baseURL: null
  aid: contentin-io:contentin-api
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: The developer portal pages render via JavaScript and no machine‑readable OpenAPI spec is publicly available.
  evidence:
  - url: https://contentin.io/
    status: 200
  checked: '2026-11-04'
x-enrichment:
  date: '2026-11-04'
  status: enriched
  artifacts_added: 18
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

ContentIn API — frequently asked questions

Does ContentIn have an API?

Yes. APIs.io lists 1 API from ContentIn, including ContentIn API.

How do I authenticate with the ContentIn API?

ContentIn documents its authentication (2 schemes). The details are profiled on APIs.io as Contentin Io Authentication.

How much does the ContentIn API cost?

ContentIn publishes its prices; its ContentIn plan is $39/month as of 2026-11-04. APIs.io lists 3 pricing plans for ContentIn, with each plan's price, limits and inclusions under Pricing on this page.

Is the ContentIn API ready for AI agents?

ContentIn has a Kin Score of 22.1 out of 100 (emerging) and an Agent Readiness score of 24.7 (agent-aware), scored by API Evangelist on 2026-11-06.

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get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
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apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
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