Facebook Graph API integration built on Val Town.

• Webhook receiver — Verifies and receives real-time events from Facebook (page messages, lead ads, etc.)
• Graph API helpers — Post to Pages, get page info, get recent posts, exchange tokens
• Live endpoint — https://ziadamrme--b6e280ce8f6c11f1bf611607ee4eb77e.web.val.run

Go to developers.facebook.com/apps and create a new app. Note the App ID and App Secret from App Settings → Basic.

Key	Description
FB_APP_ID	Your Meta App ID
FB_APP_SECRET	Your Meta App Secret
FB_PAGE_ACCESS_TOKEN	Page Access Token (from Graph API Explorer or Page settings)
FB_VERIFY_TOKEN	Any random string you choose (used for webhook verification)

👉 Add FB_APP_ID here: https://www.val.town/x/ziadamrme/Facebook_mcb/environment-variables?key=FB_APP_ID

👉 Add FB_APP_SECRET here: https://www.val.town/x/ziadamrme/Facebook_mcb/environment-variables?key=FB_APP_SECRET

👉 Add FB_PAGE_ACCESS_TOKEN here: https://www.val.town/x/ziadamrme/Facebook_mcb/environment-variables?key=FB_PAGE_ACCESS_TOKEN

👉 Add FB_VERIFY_TOKEN here: https://www.val.town/x/ziadamrme/Facebook_mcb/environment-variables?key=FB_VERIFY_TOKEN

In your Meta App dashboard, go to Webhooks, add the live endpoint URL above as the callback URL, and use the same FB_VERIFY_TOKEN you set as the env var.

Function	Description
graphGet(path, params)	Generic Graph API GET request
graphPost(path, body)	Generic Graph API POST request
postToPage(pageId, message)	Post a text message to a Page's feed
postLinkToPage(pageId, link, message?)	Post a link (with optional message) to a Page's feed
getPageInfo(pageId)	Get Page info (name, fans, about, etc.)
getPagePosts(pageId, limit?)	Get recent posts from a Page
getLongLivedToken(appId, appSecret, shortToken)	Exchange a short-lived token for a long-lived one

main.ts           — HTTP endpoint (webhook verification + event receiver)
lib/facebook.ts   — Graph API helper functions