Facebook API

Facebook Messaging API

List conversations, read message history, and reply to Facebook Messenger threads programmatically. PostPeer gives you one unified endpoint and handles the Meta Graph API and App Review.

List Page conversations with participants and last message
Load full message history for any conversation
Reply to customers within Meta's 24-hour messaging window
No Meta developer app or App Review on your side

Start Posting for Free View Docs

No credit card required.

POST https://api.postpeer.dev/v1/posts
{ "platforms": ["twitter", "linkedin"], "content": "Hello world!" }

Published

2 platforms

TwitterLinkedIn

All posts delivered

Scheduled

queue

Queued

847

Sent

Next: in 15 min

Platforms

connected

XLIFBTT

One API, every platform

"I was up and running on six different platforms in under 30 minutes. Strongly recommend!"

David Flor, Founder at Darklight Interactive

"Couldn't figure out the official Pinterest API. PostPeer was smooth. Using it daily."

Divanshu Khatter, Marketing Manager at Sembark

"Great integration experience. Jonathan ships fixes within hours. Mad respect for the speed."

Het Tikawala, Founder at Kalizzle AI Studio

How It Works

Add social media to your product in three steps.

Get Your API Key

Sign up and get your API key instantly — no sales calls, no complex onboarding.

Integrate in Minutes

A single endpoint to post, schedule, and manage content. Drop it into your product and go.

Your Users Post Everywhere

Your product now supports every major social platform — without you maintaining a single integration.

API Response Format

Clean, structured JSON that's easy to parse and integrate

Request

POST

curl "https://api.postpeer.dev/v1/messages?platform=facebook&accountId=acc_fb_page_456&limit=20" \
  -H "x-access-key: your-api-key"

Response

JSON

{
  "success": true,
  "selfId": "1029384756",
  "selfUsername": "Your Brand",
  "conversations": [
    {
      "id": "t_100000000000001",
      "participants": [
        {
          "id": "2233445566",
          "name": "Jane Doe",
          "username": "jane.doe",
          "profilePictureUrl": "https://platform-lookaside.fbsbx.com/..."
        },
        {
          "id": "1029384756",
          "name": "Your Brand",
          "username": "yourbrand",
          "profilePictureUrl": "https://platform-lookaside.fbsbx.com/..."
        }
      ],
      "lastMessage": {
        "id": "m_aWdfbXNnXzEyMw",
        "text": "Is this still in stock?",
        "from": {
          "id": "2233445566",
          "name": "Jane Doe"
        },
        "timestamp": "2026-08-05T16:40:00Z"
      },
      "updatedTime": "2026-08-05T16:40:00Z"
    }
  ],
  "nextCursor": "QVFIUl9..."
}

Everything You Need for Facebook Messenger

Read and reply to Messenger conversations without managing Meta's Graph API. List conversations, load history, and send replies from one endpoint.

List Conversations

Fetch conversations for a connected Facebook Page with each participant name and profile picture, plus the most recent message and updated time. Paginate through the inbox with a cursor.

Read Message History

Load the messages in a Messenger thread, paginated, each with the sender and a timestamp. Rebuild the full conversation on your side.

Send Replies

Reply to a customer with one call. The response returns the sent message ID so you can track delivery against your own records.

24-Hour Window Handled

Meta only allows standard replies within 24 hours of the user's last message. That is a platform rule, not ours, and the API surfaces the failure clearly when the window has closed.

Build Your Own Inbox

Everything the PostPeer dashboard inbox uses is available through the API, so you can build a branded support inbox or wire Messenger into your own CRM and help desk.

One Endpoint Across Platforms

The Facebook Messages surface uses the same `/v1/messages` request and response shape as every other PostPeer messaging endpoint. Add it to your inbox without a new integration.

More Platform APIs

Instagram Twitter / X LinkedIn TikTok

Frequently Asked Questions

Ready to Add Social Media to Your Product?

One API. Every platform. Start building with free credits.

Start Posting for FreeNo credit card required.