PlusMargin

PlusMargin (Plus Margin) is a Bangkok, Thailand based digital marketing and business consulting practice operating under the tagline "Connect | Engage | Convert." The firm focuses on inbound marketing strategy, personalized and AI-assisted marketing, buyer-persona development, and customer-journey mapping for its clients, and publishes Thai-language editorial content across marketing, business, advertising, technology, learning, insurance, and lifestyle topics. It was surfaced as a portfolio company of 500 Global — where secondary sources describe an earlier Singapore-founded "predictive persuasion" e-commerce personalization product — but the domain today serves a four-page consulting and content site with no trace of that platform. Enrichment on 2026-08-12 confirmed no product API, no developer portal, no SDKs on any package registry, no /.well-known/ discovery surface, no llms.txt and no agent card. The one callable, machine-readable surface is the stock WordPress REST API the marketing site exposes at /wp-json — 237 routes across 11 namespaces, anonymously readable for content — which is WordPress core's API rather than a product PlusMargin designed, documents, or supports.

PlusMargin publishes 2 APIs on the APIs.io network. Tagged areas include Company, Marketing, Digital Marketing, Consulting, and Advertising.

PlusMargin’s developer surface includes authentication and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub

12.1/100 emerging ▬ flat Agent 8/100 agent aware Front door AI 5/6 prominent saas Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0

2 APIs

Company Marketing Digital Marketing Consulting Advertising Customer Engagement Thailand

Kin Score

Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0

Composite quality — 12.1/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 3.6 / 17

Access Clarity 1.8 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.9 / 9

Regulatory Posture 2.4 / 15

Agent readiness — 8/100 · agent aware

Machine-Readable Contract 0 / 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 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 Well-Known Document 0 / 5

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/.

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 github.com/api-evangelist/plusmargin: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 2

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

PlusMargin Website (WordPress REST)

The public WordPress REST API (wp-json) of the PlusMargin website at plusmargin.com: the route index of the site's content management system, catalogued as one site surface rath...

PlusMargin RSS Feed

RSS 2.0 syndication feed for PlusMargin's editorial content — Thai-language articles across Marketing, Business, Advertising, Technology, Learning, Insurance, Science and Lifest...

Pricing Plans 1

Published pricing tiers and plan structures.

Plusmargin Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Plusmargin Rate Limits

0 limits

RATE LIMITS

Security Posture 2

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

Plusmargin Authentication

0 schemes

SECURITY

Plusmargin Domain Security

TLSv1.3

SECURITY

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Conventions

Conventions

ErrorCatalog

ErrorCatalog

Build 1

SDKs, sample code, and the tooling you integrate with

Packages

Packages

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

Contact

Contact

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Plans

Plans

Company 3

The organization behind the API

Website

Website

About

About

BlogRSS

BlogRSS

Other 1

Properties that don't map to a standard resource type

Sitemap

Sitemap

Source (apis.yml)

aid: plusmargin
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: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/plusmargin.png
name: PlusMargin
description: PlusMargin (Plus Margin) is a Bangkok, Thailand based digital marketing and business consulting practice operating
  under the tagline "Connect | Engage | Convert." The firm focuses on inbound marketing strategy, personalized and AI-assisted
  marketing, buyer-persona development, and customer-journey mapping for its clients, and publishes Thai-language editorial
  content across marketing, business, advertising, technology, learning, insurance, and lifestyle topics. It was surfaced
  as a portfolio company of 500 Global — where secondary sources describe an earlier Singapore-founded "predictive persuasion"
  e-commerce personalization product — but the domain today serves a four-page consulting and content site with no trace of
  that platform. Enrichment on 2026-08-12 confirmed no product API, no developer portal, no SDKs on any package registry,
  no /.well-known/ discovery surface, no llms.txt and no agent card. The one callable, machine-readable surface is the stock
  WordPress REST API the marketing site exposes at /wp-json — 237 routes across 11 namespaces, anonymously readable for content
  — which is WordPress core's API rather than a product PlusMargin designed, documents, or supports.
url: https://raw.githubusercontent.com/api-evangelist/plusmargin/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-08-12'
tags:
- Company
- Marketing
- Digital Marketing
- Consulting
- Advertising
- Customer Engagement
- Thailand
apis:
- aid: plusmargin:plusmargin-com-website-wordpress-rest
  name: PlusMargin Website (WordPress REST)
  description: 'The public WordPress REST API (wp-json) of the PlusMargin website at plusmargin.com: the route index of the
    site''s content management system, catalogued as one site surface rather than as separate APIs.'
  baseURL: https://plusmargin.com/wp-json
  tags:
  - WordPress
  x-surface: platform-generated
  properties:
  - type: Documentation
    url: https://plusmargin.com/wp-json
  x-platform: wordpress
  x-platform-surface: rest
- aid: plusmargin:rss-feed
  name: PlusMargin RSS Feed
  description: RSS 2.0 syndication feed for PlusMargin's editorial content — Thai-language articles across Marketing, Business,
    Advertising, Technology, Learning, Insurance, Science and Lifestyle. Served as application/rss+xml with no authentication.
    A Yoast-generated sitemap index is also published, covering post, page, category, tag and author URLs.
  humanURL: https://plusmargin.com/
  baseURL: https://plusmargin.com/feed/
  tags:
  - Feed
  - RSS
  - Syndication
  - Content
  properties:
  - type: BlogRSS
    url: https://plusmargin.com/feed/
  - type: Sitemap
    url: https://plusmargin.com/sitemap.xml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://plusmargin.com
- type: About
  url: https://plusmargin.com/about/
- type: Contact
  url: https://plusmargin.com/contact/
- type: PrivacyPolicy
  url: https://plusmargin.com/privacy-policy/
- type: DomainSecurity
  url: security/plusmargin-domain-security.yml
- type: BlogRSS
  url: https://plusmargin.com/feed/
- type: Sitemap
  url: https://plusmargin.com/sitemap.xml
- type: Authentication
  url: authentication/plusmargin-authentication.yml
- type: Conventions
  url: conventions/plusmargin-conventions.yml
- type: ErrorCatalog
  url: errors/plusmargin-problem-types.yml
- type: RateLimits
  url: rate-limits/plusmargin-rate-limits.yml
- type: Plans
  url: plans/plusmargin-plans-pricing.yml
- type: Packages
  url: packages/plusmargin-packages.yml
- type: LLMsTxt
  url: llms/plusmargin-llms.txt
x-enrichment:
  date: '2026-08-12'
  status: minimal
  artifacts_added: 8
  pass: local-v1
x-coverage:
  state: none
  reason: no-developer-program
  detail: PlusMargin runs a four-page WordPress consulting site — its own page sitemap lists only /, /about/, /contact/ and
    /privacy-policy/ — with no developer, API, docs or pricing page, no api/developer/docs subdomain (all NXDOMAIN), and no
    package on any registry; the only machine-readable surface is the CMS's own /wp-json route index.
  evidence:
  - url: https://plusmargin.com/page-sitemap.xml
    status: 200
  - url: https://plusmargin.com/openapi.json
    status: 404
  - url: https://plusmargin.com/.well-known/agent-card.json
    status: 404
  - url: https://plusmargin.com/llms.txt
    status: 404
  - url: https://plusmargin.com/wp-json
    status: 200
  checked: '2026-08-12'

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