Reddit Archive MCP server

@pipeworx/reddit-archive

Historical Reddit post and comment search, and subreddit activity over time, going back to Reddit's early years — reaching far further back than the live Reddit API, which only exposes a recent, unfiltered window.

Part of Pipeworx — an MCP gateway connecting AI agents to 1779+ live data sources. This is an independent, unofficial integration — not affiliated with, endorsed by, or published by the upstream provider.

Tools

• reddithistoryposts(subreddit, query?, after?, before?, limit?, sort?) — posts from one subreddit, filtered by keyword and/or date range. Returns id, title, author, createdutc (ISO), score, numcomments, permalink.
• reddithistorycomments(subreddit?, linkid?, query?, after?, before?, limit?, sort?) — comments scoped to a subreddit and/or a specific post, filtered by keyword and/or date range. Requires at least one of subreddit or linkid. Returns id, author, createdutc (ISO), score, body, linkid, permalink.
• subreddit_activity(subreddit, after?, before?) — subreddit identity (subscriber count, creation date, all-time post/comment totals, earliest indexed post/comment) plus monthly post/comment counts within a date window (default: the last 12 months).

Auth

Keyless.

Data sources

historical Reddit archive — independently re-crawled and republished public Reddit posts, comments and subreddit metadata, covering years the live Reddit API no longer serves. No uptime guarantee is published.

• Arctic Shift (the arctic_shift open-source project by Arthur Heitmann), a

Other notes

same shape whether a subreddit genuinely has nothing matching a filter OR the subreddit was never indexed at all — there is no dedicated "not found" status for that case. On an empty result this pack makes one extra lookup call against the upstream's own subreddit index to tell the two apart: an unindexed/nonexistent subreddit throws a loud error; a real subreddit with a genuinely empty window returns an explicit verifiedempty: true result instead of a bare []. reddithistorycomments does the same check against the post id when scoped by linkid instead of subreddit.

• Silent-zero handling. The upstream answers an empty result with the

query with HTTP 422 ("Timeout. Maybe slow down a bit") or HTTP 429 (rate-limited) — observed live to recur 2-3 times in a row under load, unrelated to the query itself. This pack retries both, honouring Retry-After on a 429 when the upstream sends one, within a 20s wall-clock retry budget (not just a fixed attempt count) before surfacing it as a real error.

• Transient 422s and 429s. The upstream occasionally answers a well-formed

aggregate endpoint buckets by local calendar month but reports each bucket's timestamp converted to UTC, which lands on the last hour of the PRECEDING UTC day (e.g. a January bucket arrives as "2019-12-31T23:00:00.000Z"). This pack rolls that timestamp forward to the next UTC midnight before reading the month, so monthlyposts / monthlycomments are labelled by the month they actually cover.

• Monthly bucket labelling (subredditactivity).** The upstream's

tools that need more than one upstream call internally (the empty-result existence check; subreddit_activity's three calls) space them out rather than firing in a burst.

• Politeness. This pack keeps outbound calls to roughly one per second —

filter and this pack does not roll any tool's results up by author — only the raw, publicly-served posts/comments a filter matches.

• No per-author aggregation. reddithistorycomments accepts no author

either form.

• Date format. after/before take ISO dates like "2019-01-01".
• IDs come back bare (e.g. "ei9204", not "t3ei9204"); linkid accepts

Quick Start

Add to your MCP client (Claude Desktop, Cursor, Windsurf, etc.):

Shortened. The full README is on GitHub.