Retrieve CAPEC attack patterns, categories, and views by ID, such as CAPEC-66, CAPEC66, or 66, including Deprecated and Obsolete records; each entry’s type says which. Processes up to 20 distinct IDs within a 24,000-byte response budget and discloses deferred IDs; a CWE ID or an item that is no ID returns in notFound with recovery guidance; only an item holding a control character other than whitespace, or a non-ID item over 150 characters, rejects the whole call. Patterns default to summary, prerequisites, execution, mitigations, and mappings; categories and views default to summary (the category summary or view objective) and relations (members in source order, or a filter-defined view’s source XPath filterDefinition). Views CAPEC-1000 (Mechanisms of Attack) and CAPEC-3000 (Domains of Attack) are entry points for browsing patterns by category. A default section that does not fit the budget is omitted whole and named with its size and a re-call (kind partial). The notes section, outside the defaults, returns recorded MITRE notes. Explicit sections remain complete, including one oversized record with disclosure; an empty array requests an outline. Recorded CWE and ATT&CK mappings are incomplete and do not establish current ATT&CK validation.