A public, append-only feedback platform. Anyone can post on per-topic pages; once posted, no one — including the operator — can silently edit or delete an entry. Bodies can be erased for legal reasons, but each erasure is itself an entry on the chain — never silent.
- Live: https://append.page
- Spec (humans + coding agents): https://append.page/AGENTS.md
- Public dataset: https://huggingface.co/datasets/appendpage/ledger (hourly mirror)
- License: MIT
appendpage/appendpage— backend: append-only hash chain with salted commitments, HTTP API, verifierappendpage/web— default frontend (Doc / Chronological / Raw views)
Every read AND write endpoint is CORS-open. The wire format is small (9 fields per entry, JCS-canonicalized) and the spec is one self-contained document — written for both humans and coding agents. Anyone can ship a viewer or composer for append.page in ~30 lines of HTML; see AGENTS.md §9.
curl -O https://append.page/verify.py
python verify.py https://append.page/p/<slug>OK: verified N entries, chain intact, ... means every hash, every link, and every body-commitment recomputes correctly. Anyone can run this; nothing is trust-the-server.
Run by Yuntian Deng (@da03), University of Waterloo. Personal research project, not a University of Waterloo service.
For anything — questions, erasure requests, takedowns, abuse reports — open an issue on the backend repo. Security disclosures via GitHub Security Advisories.