web-archive-mcp

MCP server for persistent web fetch and search archiving. Every web_fetch and web_search result is saved as timestamped JSONL, indexed by fst-indexer, and searchable via unified-history-mcp.

Part of the Palimpsest investigative toolkit.

Why

web_fetch and web_search results normally evaporate when a session ends. Pages change, get deleted, or get memory-holed. This closes that gap — every result is persisted, content-addressed for dedup, and fed into the same search pipeline as your session logs and transcripts. Three months later, a search(domain="all", query="target name") still finds the page that's been 404'd since July.

Related MCP server: Memory MCP

Architecture

web_fetch / web_search
        │
        ▼
  web-archive-mcp  ──writes──►  ~/.local/share/web-archive/*.jsonl
        │                                │
        │                        fst-indexer (Jsonl extractor)
        │                                │
        ▼                                ▼
  returns content              index.fst + manifest.json
                                       │
                                       ▼
                              unified-history-mcp
                              domain: "web-archive"

Tools

Installation

git clone https://github.com/palimpsest-labs/web-archive-mcp
cd web-archive-mcp
python3 -m venv .venv
source .venv/bin/activate
pip install -e .

Integration with unified-history-mcp

Add to your unified-history TOML config:

[domains.web-archive]
dir = "~/.local/share/web-archive"
pattern = "*.jsonl"
extractor = "jsonl"
label = "web-archive entry"
filters = []

Then rebuild: search(domain="web-archive", query="rebuild") or call rebuild directly.

Once indexed, a search(domain="all", query="your search") scans your sessions, transcripts, notifications, and every web page you've ever fetched — in a single query.

Entry format

{
  "type": "fetch",
  "source": "https://example.com/page",
  "title": "Example Page",
  "content": "# Example\n\nMarkdown content...",
  "timestamp": "2026-07-30T21:15:00Z",
  "content_hash": "abc123..."
}

For searches, source holds the query string and type is "search".

Content-addressed dedup prevents storing identical entries. Same source + same content hash = skipped.

License

MIT