PMKIN JavaScript SDK

PMKIN is a lightweight headless CMS designed for developers who want to focus on building rather than managing complex content infrastructure. It provides a simple GraphQL API to manage and deliver your content, making it perfect for blogs, documentation sites, and other content-driven applications.

Installation

bun add pmkin
# or
npm install pmkin
# or
yarn add pmkin
# or
pnpm add pmkin

Getting Started (Next.js)

Setup Client

First, create a PMKIN client instance. Create a new file lib/pmkin.ts:

import { PmkinClient } from 'pmkin'

if (!process.env.PMKIN_TOKEN) {
  throw new Error('PMKIN_TOKEN is not set')
}

export const pmkin = new PmkinClient({
  token: process.env.PMKIN_TOKEN
})

Add your PMKIN token to your .env.local file:

PMKIN_TOKEN=your_token_here

List Blog Posts

Create a blog posts listing page at app/blog/page.tsx:

import Link from 'next/link'
import { pmkin } from '@/lib/pmkin'

 // Revalidate every hour
export const revalidate = 3600

export default async function BlogPage() {
  const posts = await pmkin.listDocuments()

  return (
    <div className="prose lg:prose-xl">
      {posts.map((post) => (
        <article key={post.id}>
          <h2>{post.title}</h2>

          {post.subtitle && <p>{post.subtitle}</p>}

          <Link href={`/blog/${post.slug}`}>Read more</Link>
        </article>
      ))}
    </div>
  )
}

Show a Single Blog Post

Create a dynamic route for individual blog posts at app/blog/[slug]/page.tsx:

import { notFound } from 'next/navigation'
import Markdown from 'react-markdown'

import { pmkin } from '@/lib/pmkin'

interface PageProps {
  params: {
    slug: string
  }
}

// Revalidate every hour
export const revalidate = 3600

export default async function BlogPostPage({ params }: PageProps) {
  const post = await pmkin.findDocumentBySlug(params.slug)

  if (!post) {
    notFound()
  }

  return (
    <article className="prose lg:prose-xl">
      <h1>{post.title}</h1>

      {post.subtitle && <p>{post.subtitle}</p>}

      <Markdown>
        {post.markdown}
      </Markdown>
    </article>
  )
}

Error Handling

The client methods can throw different types of errors depending on the API response:

try {
  const posts = await pmkin.listDocuments()
} catch (error) {
  if (error instanceof GraphQLError) {
    // GraphQL validation or execution errors
    console.error('GraphQL Error:', error.message)
  } else if (error instanceof UnauthorizedError) {
    // Invalid or expired token
    console.error('Authentication failed')
  } else if (error instanceof RateLimitError) {
    // Too many requests
    console.error('Rate limit exceeded')
  } else if (error instanceof InvalidResponseError) {
    // Invalid response format
    console.error('Invalid API response:', error.response)
  } else if (error instanceof RequestError) {
    // Other HTTP errors
    console.error('Request failed:', error.message)
  }
}

Error Types

• GraphQLError: Thrown when the GraphQL query is invalid or fails to execute
• UnauthorizedError: Thrown when the API token is invalid or expired (HTTP 401)
• RateLimitError: Thrown when you've exceeded the rate limit (HTTP 429)
• InvalidResponseError: Thrown when the API response format is invalid
• RequestError: Thrown for other HTTP errors (like 503 Service Unavailable)

Not Found Cases

Methods that fetch single items return undefined when the item is not found:

const post = await pmkin.findDocumentBySlug('non-existent')

if (!post) {
  // Handle not found case
}

API Reference

PmkinClient

const client = new PmkinClient({
  token: string // Your PMKIN API token
})

Documents

// List all documents
const posts = await client.listDocuments()
// Returns: DocumentListing[]

// List all documents in a specific category
const posts = await client.listDocumentsInCategory('c58b1646-94b7-4baf-b9cb-1c40d47284ac', true) // Second parameter is optional includeDrafts flag
// Returns: DocumentListing[]

// Find document by ID
const post = await client.findDocument('6733466740869c00233ad8dd')
// Returns: Document | undefined

// Find document by slug
const post = await client.findDocumentBySlug('my-post')
// Returns: Document | undefined

Categories

// List all categories
const categories = await client.listCategories()
// Returns: CategoryListing[]

// Find category by ID
const category = await client.findCategory('c58b1646-94b7-4baf-b9cb-1c40d47284ac')
// Returns: Category | undefined