Sync records whose verified_at is later than cursor (exclusive) across library sources, articles, datasets, bots, and support notes. Output is { cursor, count, entries }. cursor is the YYYY-MM-DD that was applied. count is the number of rows in that window. Each entry has kind (article, library, support, dataset, or bot), id, title, url, and verified_at. Some rows also include md_url, category, date_published, or note. Omit cursor to apply an exclusive cursor of UTC today minus 30 days; the response cursor is that date. Pass a YYYY-MM-DD cursor to sync from a stored date. There is no text filter, no limit, and no offset, so an old cursor can return the whole catalog (over 100 entries, about 43 KB). A cursor that is not YYYY-MM-DD returns isError with text cursor must be YYYY-MM-DD. A failed read returns isError whose text is the Error message. This free list is the raw changelog: it is not grouped by protocol and it is not Markdown, and it does not return source cards. Use search_sources instead when you want to browse or filter the library, including newest-first and updated_since (limit 1-50, no offset). Use list_categories, list_articles, list_datasets, list_bots, or get_support_info instead when you want the current full document rather than changelog rows. Use get_trust_checklist instead for the trust checklist. For one record, strip article: before get_article, dataset: before get_dataset, and bot: before get_bot. Library ids have no prefix; use get_source. Support rows have no per-id getter; use get_support_info or get_trust_checklist. Paid GET https://api.agentpaywire.com/v1/changes returns library source cards only, for an inclusive verified_at window, with protocol, category, and new-or-updated filters, as JSON or Markdown. Each client gets 5 unpaid calls per rolling 24 hours. A response in that allowance is HTTP 200 with X-Trial-Remaining and does not spend a credit. After that, the unpaid call is HTTP 402 via x402 or L402. A valid paid call spends one credit and does not use the allowance. Free, no auth.