{"slug":"x402-apidirect-io-v1-substack-user-activity-260e49","title":"Get an author's public activity feed","host":"x402.apidirect.io","method":"GET","resource":"https://x402.apidirect.io/v1/substack/user/activity","category":"other","description":"Get an author's public activity feed: their Notes and the posts they publish or restack, newest first, or only their notes, posts, replies, restacks or likes.","price_listed":0.004,"price_asked":null,"state":"effects","state_label":"Not tested: has real-world effects","checks_7d":0,"answered_7d":0,"latency_ms_median":null,"reported_calls_30d":0,"reported_payers_30d":0,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"username":"hamish"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"properties":{"pages":{"default":1,"description":"Number of pages to fetch and merge into one response (1-250, billed per page returned). Each page returns 12 items. Fetching stops early when there are no more results.","maximum":250,"minimum":1,"type":"integer"},"type":{"description":"Only one kind of activity: note, post, reply, restack or like. Omit for notes, posts and restacks.","enum":["note","post","reply","restack","like"],"type":"string"},"url":{"description":"Profile URL, e.g. https://substack.com/@lenny (max 500 characters). Provide one of username, user_id or url.","maxLength":500,"type":"string"},"user_id":{"description":"Numeric Substack user ID, as returned in user_id. Provide one of username, user_id or url.","type":"string"},"username":{"description":"Substack handle, e.g. lenny, with or without a leading @ (max 100 characters). Provide one of username, user_id or url.","maxLength":100,"type":"string"}},"required":[],"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"}},"required":["input"],"type":"object"},"history":[],"description_full":"Get an author's public activity feed: their Notes and the posts they publish or restack, newest first, or only their notes, posts, replies, restacks or likes.","last_updated":"2026-10-25T12:23:19.758Z","schemes":["exact","upto"]}