Substack Reader

Read posts from Substack newsletters via Substack's public JSON API (no login, no API key). Use this skill to capture the latest posts from monitored Substack profiles within a recent time window (e.g. last 48h) — it resolves a substack @handle to ALL of that author's publications and reads each — OR to read the full content of specific Substack posts you have the links to. Returns posts (title, date, audience, paywall flags, full text as Markdown) as JSON. Reads a configurable account list (accounts.json) or a list of post URLs (post_links.json / CLI). Paid-subscriber posts are flagged (is_paywalled/truncated) since their body is only a teaser when unauthenticated.