# PlusMargin

> PlusMargin (Plus Margin) is a Bangkok, Thailand based digital marketing and business consulting
> practice operating under the tagline "Connect | Engage | Convert." It publishes Thai-language
> editorial content on marketing, business, advertising, technology, learning, insurance and
> lifestyle, and sells consulting engagements by direct contact. It ships no API product, no SDK,
> no developer portal and no documentation. This file was GENERATED by API Evangelist from the
> company's public surface — PlusMargin does not publish an llms.txt of its own
> (https://plusmargin.com/llms.txt returns 404).

## What an agent can and cannot do here

- There is **no product API**. api., app., developer., docs., dev. and portal.plusmargin.com are
  all NXDOMAIN. /openapi.json, /openapi.yaml, /swagger.json, /graphql, /api and /api-docs all 404.
- There is **no agent surface**. No /.well-known/agent-card.json, no /.well-known/agent.json, no
  MCP server, no ai-plugin.json, no api-catalog.
- There **is** one callable, machine-readable surface: the stock **WordPress REST API** at
  https://plusmargin.com/wp-json — 237 routes across 11 namespaces, self-identifying as
  "Plus Margin". Core content is anonymously readable. This is WordPress core's API, not a
  product PlusMargin designed, supports, or documents. Treat it as a content feed, not a
  supported integration surface.
- To reach the company, use the contact page. There is no developer support channel.

## Company

- Website: https://plusmargin.com
- About: https://plusmargin.com/about/
- Contact: https://plusmargin.com/contact/ (postal address in Prawet, Bangkok; phone; info@ email)
- Privacy Policy: https://plusmargin.com/privacy-policy/

## Content

- RSS feed: https://plusmargin.com/feed/ (RSS 2.0)
- Sitemap index: https://plusmargin.com/sitemap.xml (post, page, category, post_tag, author)
- Categories: Marketing (67), Business (41), Lifestyle (7), Technology (5), Insurance (3),
  Learning (3), Science (3), Advertising (2) — counts as of 2026-08-12
- Published pages: exactly four — /, /about/, /contact/, /privacy-policy/

## WordPress REST API (third-party CMS surface, unsupported)

- Root discovery document: https://plusmargin.com/wp-json
- Content routes: https://plusmargin.com/wp-json/wp/v2 (posts, pages, categories, tags, types,
  users, media, search, comments)
- Pagination: `page` + `per_page` (max 100); `X-WP-Total` and `X-WP-TotalPages` response headers;
  RFC 8288 `Link` header with rel="next"/"prev"
- Sparse fieldsets: `?_fields=` — hypermedia embedding: `?_embed`
- Authentication: WordPress Application Passwords (HTTP Basic), authorize at
  https://plusmargin.com/wp-admin/authorize-application.php. Cookie + `X-WP-Nonce` for
  same-origin browser calls. No OAuth 2.0, no OpenID Connect.
- Errors: `{"code": "...", "message": "...", "data": {"status": nnn}}` as application/json.
  NOT RFC 9457 problem+json.
- Rate limits: none published, none signaled. No X-RateLimit-*, no Retry-After, no 429 observed.
- Idempotency: not supported. No Idempotency-Key.
- The WordPress **Abilities API** (`/wp-json/wp-abilities/v1/abilities`) is registered on this
  install but returns HTTP 401 `rest_forbidden` to anonymous callers, so no ability catalog or
  inputSchema can be introspected without credentials.

## Profile artifacts (API Evangelist, third-party)

- apis.yml — the APIs.json profile for this company
- well-known/plusmargin-well-known.yml — every /.well-known/ and contract path probed, with status
- authentication/plusmargin-authentication.yml — observed auth schemes
- conventions/plusmargin-conventions.yml — observed pagination, errors, versioning, idempotency
- errors/plusmargin-problem-types.yml — observed error envelope and codes
- rate-limits/plusmargin-rate-limits.yml — recorded zero
- plans/plusmargin-plans-pricing.yml — recorded zero
- packages/plusmargin-packages.yml — recorded zero across npm, PyPI, RubyGems, crates.io, GitHub
- security/plusmargin-domain-security.yml — TLS/DNS posture probe

## Optional

- Corrections, re-scores and removal are free: https://github.com/api-evangelist/plusmargin/issues