@promobase/linkedin-sdk

Type-safe TypeScript SDK for LinkedIn organic publishing and OAuth.

LinkedIn does not currently publish a public OpenAPI/Swagger spec or public per-endpoint Rest.li restspec for the Marketing API surfaces this package wraps. This SDK is hand-authored against the official Microsoft Learn endpoint docs and LinkedIn's Rest.li protocol documentation.

Install

bun add @promobase/linkedin-sdk
# or
npm install @promobase/linkedin-sdk

Use

import { LinkedIn } from "@promobase/linkedin-sdk";

const linkedin = LinkedIn.createClient({
  accessToken: process.env.LINKEDIN_ACCESS_TOKEN!,
});

const result = await linkedin.posts.createText({
  authorUrn: "urn:li:organization:123456",
  commentary: "New launch is live.",
});

console.log(result.postUrn);

Publish Media

const imageUrn = await linkedin.assets.uploadImageFromUrl(
  "urn:li:organization:123456",
  "https://cdn.example.com/photo.jpg",
);

await linkedin.posts.createImage({
  authorUrn: "urn:li:organization:123456",
  commentary: "Behind the scenes.",
  imageUrn,
  options: { altText: "A team photo" },
});

OAuth

const oauth = LinkedIn.OAuth.create({
  clientId: process.env.LINKEDIN_CLIENT_ID!,
  clientSecret: process.env.LINKEDIN_CLIENT_SECRET!,
  redirectUri: "https://app.example.com/oauth/linkedin/callback",
});

const url = oauth.getAuthorizationUrl({ state: "opaque-state" });

Official References

• LinkedIn API Clients - official protocol-level client guidance; LinkedIn notes these clients do not model specific APIs.
• Rest.li Protocol - source for Rest.li 2.0 headers, URL encoding, list notation, and resource methods.
• Marketing API Versioning - source for /rest base path and LinkedIn-Version.
• Posts API - source for text, image, video, partial update, delete, and x-restli-id behavior.
• Images API - source for initializeUpload and image URNs.
• Videos API - source for multipart upload instructions, ETags, and finalization.
• Comments API - source for comment creation, x-restli-id, and comment URNs.
• Organization Lookup API - source for organization lookup endpoints.
• Organization Access Control by Role - source for administered organization discovery.
• LinkedIn 3-Legged OAuth Flow - source for authorization and token exchange.
• Programmatic Refresh Tokens - source for refresh token exchange behavior.
• Sign In with LinkedIn using OpenID Connect - source for /v2/userinfo.