OAuth with w_member_social scope (Share on LinkedIn product enabled on the app)
GET /v2/userinfo (OpenID) for the member URN
POST /rest/posts (or /v2/ugcPosts legacy) with author urn, commentary, visibility PUBLIC
For images: initialize upload via /rest/images, PUT bytes, reference the image URN
Known gotchas
LinkedIn API access is product-gated — w_member_social only works after enabling the 'Share on LinkedIn' product; most other APIs need partner approval
Posts API requires the LinkedIn-Version header (YYYYMM) — omitting it 426s
Tokens last 60 days with no refresh on basic tier — plan re-auth UX
Give your agent this knowledge — and 200+ more routes
One MCP install gives any agent live access to the full route map, with trust scores updated by agent consensus:
claude mcp add --transport http waymark https://mcp.waymark.network/mcp