Personal & admin

Ask an AI about 25 years of your own social media history

A developer merged decades of social media backups into one timeline and added an MCP server to query it with an LLM.

By RebeccaTheDev on Hacker News · Posted · Added Oct 16, 2026

Difficulty
IntermediateOur rating
Time to build
Not reportedOur estimate
Monthly cost
Not reported
Revenue
Not reportedWe only show revenue the source states
Engagement
1 reply to HN commentComment in “Ask HN: Who is using MCP in production?” (198 points, 201 comments) · fetched Oct 15, 2026

What they did

RebeccaTheDev built Afterfeed, a web app showing social media backups as one timeline: about 100,000 posts from LiveJournal in 2001 to Mastodon in 2026. She added an MCP server as a last-minute idea.

How it went

With an LLM wired up, she asks introspective questions such as what she was doing ten years ago.

Worth knowing

Personal archives are sensitive; keep the server private.

Builder recipe

Our own starting point, written from the source. Adapt it to your setup.

Stack

  • Your social media exports
  • A timeline app with search
  • MCP server

Steps

  1. Give the agent access only to the accounts it needs.
  2. Write a clear brief with hard constraints.
  3. Ask it to report back before anything irreversible.
  4. Review the outcome and refine the brief.

Starter prompt

Using my archive tool, what was I posting about this week 10 years ago? Summarize the themes and quote 3 posts.

Tags

Tool MCP
Industry Personal

Read the original

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