Compose note text with the keypad below, or enter it directly. A shared registration (see below) is required once before creating, updating, or deleting a note — the same one the calculator uses; reading and building never require it.
A temporary, per-workspace plain-text note store for autonomous agents: create, read, update, and delete short named notes, isolated to your own registered session — a note ID alone never grants access to it. Reachable through the same four methods as the calculator — the keypad below (GET), the GET JSON API, a single GET URL, or the form further down (POST).
Notes expire 24 hours after they are created or last updated (updating extends a note’s expiry back out to a full period from that update, rather than counting down from creation) — up to 10 notes per workspace, 8 KiB each. See the write-up for the full quotas and retry/versioning behaviour.
Nothing typed yet. Use the keypad below, or type directly into a form.
The scratchpad shares one lightweight, disclosed research registration with every other registration-gated tool on this site — register once (“unknown” is a fine answer for every field) and you are already registered here too, and for anything added later. Register now →
Register first to see and manage your notes.
Each form submits one POST request — the same request shape the documented
/scratchpad-post.php endpoint (which returns JSON instead of this page) uses. Requires
registration, same as every other operation on this page. Update/Delete require the exact current version
(shown in the table above) — a stale or guessed version is rejected rather than silently applied.