Kapost

Kapost is a content operations platform — now part of Upland Software — that lets B2B marketing teams plan, produce, distribute, and analyze content across the customer journey through its Canvas, Studio, Gallery, and Insights modules. Kapost exposes a versioned REST Content API (/api/v1) secured with HTTP Basic authentication using a per-user API token and returning JSON, plus outbound content webhooks (create/update/publish/delete), an XML-RPC interface, and a first-party WordPress plugin for publishing content from Kapost to WordPress sites. This profile was enriched from Kapost's live developer portal.

Kapost is listed with 1 API on the APIs.io network. Tagged areas include Content Operations, Content Marketing, Content Management, Marketing, and Sales Enablement.

The Kapost catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Kapost’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, authentication, sandbox, and 18 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

49.5/100 developing ▬ flat Agent 22/100 agent aware Front door AI 6/6 dominant Heartbeat 0/100 dormant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 API

Content OperationsContent Marketing Content Management Marketing Sales Enablement Webhook REST API B2BUpland Software

Kin Score

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

Composite quality — 49.5/100 · developing

Contract Quality 8.3 / 21

Developer Ergonomics 10.9 / 17

Access Clarity 12.3 / 17

Operational Transparency 1.2 / 11

Contract Governance 1.9 / 10

Discoverability 6.2 / 9

Regulatory Posture 3.8 / 15

Agent readiness — 22/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 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 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):

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
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
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

9 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 39.0 — up to +15.3 composite points
Operational Transparency scores 10.5 — up to +11.6 composite points
Contract Governance scores 18.2 — up to +9.8 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/kapost/apis.yml: open an issue on github.com/api-evangelist/kapost 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Content, Documentation and Design Platforms	builds-on	29.3	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

APIs 1

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

Kapost Content API

Versioned REST Content API with 67 documented operations across content, collections, comments, reminders, tasks, visibility, ideas, initiatives, custom fields, content types, d...

Kapost API pricing

Prices published by Kapost, read 2026-10-28 from uplandsoftware.com:443/adestra/pricing/.

Plan	Price
Starter	Starting at $10,000 USD/year Includes: Includes up to 10 million email sends annually and unlimited contacts
Growth	Starting at $45,000 USD/year Includes: Includes up to 50 million email sends annually and unlimited contacts
Enterprise	Starting at $100,000 USD/year Includes: Includes up to 200 million email sends annually and unlimited contacts
Advanced Segmentation Packages (Audiences)	Packages range from $15,000–$100,000 USD/year, based on annual email volume. Includes: based on annual email volume
Professional Services	Custom pricing Includes: Packages are tailored to your specific needs and requirements.

Plan details, limits and sources →

Billed by: subscription · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Kapost Plans Pricing

5 plans

PLANS

Kapost Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Kapost Rate Limits

0 limits

RATE LIMITS

FinOps 1

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

Kapost Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Kapost Webhooks

ASYNCAPI

Security Posture 3

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

Kapost Authentication

http · 1 scheme

SECURITY

Kapost Domain Security

TLSv1.2 · HSTS

SECURITY

Kapost Trust Center

SOC 2 Type 2, SOC 1 Type 2, ISO/IEC 27001:2022, PCI DSS, CSA STAR Level 1, GDPR, CCPA, PIPEDA, GLBA, EU-US Data Privacy Framework, Swiss-US Data Privacy Framework, UK Extension ...

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Login

Sandbox

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Webhooks

Conventions

Components

DataModel

Conformance

Lifecycle

Build 2

SDKs, sample code, and the tooling you integrate with

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

Authentication

DomainSecurity

Compliance

TrustCenter

Operate 2

Status, limits, changes, and where to get help

Support

Support

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Plans

Plans

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: kapost
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: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  - sandbox
  - url: https://kapost.com/
    status: 301
    note: declared website redirects to https://uplandsoftware.com:443/kapost/ — a different registrable domain (kapost.com
      -> uplandsoftware.com), possible rename or acquisition (probed 2026-09-03, roadmap#169)
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/kapost.png
name: Kapost
description: Kapost is a content operations platform — now part of Upland Software — that lets B2B marketing teams plan, produce,
  distribute, and analyze content across the customer journey through its Canvas, Studio, Gallery, and Insights modules. Kapost
  exposes a versioned REST Content API (/api/v1) secured with HTTP Basic authentication using a per-user API token and returning
  JSON, plus outbound content webhooks (create/update/publish/delete), an XML-RPC interface, and a first-party WordPress plugin
  for publishing content from Kapost to WordPress sites. This profile was enriched from Kapost's live developer portal.
url: https://raw.githubusercontent.com/api-evangelist/kapost/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- techstars
x-tier: enriched
x-tier-reason: live-developer-portal
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-08-13'
tags:
- Content Operations
- Content Marketing
- Content Management
- Marketing
- Sales Enablement
- Webhook
- REST API
- B2B
- Upland Software
tags_raw:
- Content Operations
- Content Marketing
- Content Management
- Marketing
- Sales Enablement
- Webhooks
- REST API
- B2B
- Upland Software
apis:
- name: Kapost Content API
  description: Versioned REST Content API with 67 documented operations across content, collections, comments, reminders,
    tasks, visibility, ideas, initiatives, custom fields, content types, destinations, memberships, users and insights. HTTP
    Basic auth with a per-user API token (password ignored); JSON responses wrapped in a response/count/pagination envelope;
    page/per_page pagination; basic/full/dynamic response detail levels; uri-path versioning. The callable base URL is the
    customer's own instance subdomain (https://{instance}.kapost.com/api/v1) — there is no shared API host. The developer
    portal ships a live "Try it" API playground for every endpoint. No OpenAPI specification is published.
  humanURL: https://developer.kapost.com/
  baseURL: https://api.kapost.com/api/v1
  tags:
  - Content
  - Webhook
  tags_raw:
  - Content
  - Webhooks
  properties:
  - type: Documentation
    url: https://developer.kapost.com/
  - type: APIReference
    url: https://developer.kapost.com/content-api-responses
  - type: Authentication
    url: authentication/kapost-authentication.yml
  - type: Webhooks
    url: asyncapi/kapost-webhooks.yml
  - type: Conventions
    url: conventions/kapost-conventions.yml
  - type: DataModel
    url: data-model/kapost-data-model.yml
  - type: Sandbox
    url: sandbox/kapost-sandbox.yml
  - type: RateLimits
    url: rate-limits/kapost-rate-limits.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://kapost.com/
- type: DeveloperPortal
  url: https://developer.kapost.com/
- type: Documentation
  url: https://developer.kapost.com/
- type: APIReference
  url: https://developer.kapost.com/content-api-responses
- type: GettingStarted
  url: https://developer.kapost.com/api-getting-started
- type: Integrations
  url: https://apps.kapost.com/
- type: Login
  url: https://app.kapost.com/users/sign_in
- type: Support
  url: https://support.uplandsoftware.com/portal/ss/login
- type: Blog
  url: https://uplandsoftware.com/kapost/resources/blog/
- type: Authentication
  url: authentication/kapost-authentication.yml
- type: Webhooks
  url: asyncapi/kapost-webhooks.yml
- type: Conventions
  url: conventions/kapost-conventions.yml
- type: Packages
  url: packages/kapost-packages.yml
- type: DomainSecurity
  url: security/kapost-domain-security.yml
- type: LLMsTxt
  url: llms/kapost-llms.txt
- type: PrivacyPolicy
  url: https://uplandsoftware.com/privacy/
- type: GitHubOrganization
  url: https://github.com/kapost
- type: Sandbox
  url: sandbox/kapost-sandbox.yml
- type: Components
  url: components/kapost-components.yml
- type: DataModel
  url: data-model/kapost-data-model.yml
- type: Conformance
  url: conformance/kapost-conformance.yml
- type: Compliance
  url: https://trust.uplandsoftware.com/
- type: TrustCenter
  url: security/kapost-trust-center.yml
- type: Lifecycle
  url: lifecycle/kapost-lifecycle.yml
- type: Plans
  url: plans/kapost-plans-pricing.yml
- type: RateLimits
  url: rate-limits/kapost-rate-limits.yml
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 9
  pass: local-v1

Kapost API — frequently asked questions

Does Kapost have an API?

Yes. APIs.io lists 1 API from Kapost, including Kapost Content API.

How do I authenticate with the Kapost API?

Kapost uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Kapost Authentication.

How much does the Kapost API cost?

Kapost publishes its prices; its Starter plan is Starting at $10,000 USD/year as of 2026-10-28. APIs.io lists 5 pricing plans for Kapost, with each plan's price, limits and inclusions under Pricing on this page.

Is the Kapost API ready for AI agents?

Kapost has a Kin Score of 49.5 out of 100 (developing) and an Agent Readiness score of 22.3 (agent-aware), scored by API Evangelist on 2026-11-06.

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