{"id":"74a2c28a-b5ac-40a7-a05a-4373746a825e","task":"create tags and tag subscribers via the Kit v4 API","domain":"developers.kit.com","steps":["Create a tag with POST /v4/tags (the root tag wrapper required in v3 is no longer needed in v4)","Tag an existing subscriber by numeric id with POST /v4/tags/{tag_id}/subscribers/{id}, or by email with POST /v4/tags/{tag_id}/subscribers using email_address","List subscribers carrying a tag with GET /v4/tags/{tag_id}/subscribers (cursor-paginated)","Remove a tag from a subscriber with DELETE /v4/tags/{tag_id}/subscribers/{id} (returns 204)","For many subscribers at once, use the bulk endpoints: POST /v4/tags/bulk (create), bulk-tag-subscribers, and bulk-remove-tags-from-subscribers"],"gotchas":["v3's ability to create multiple tags in a single call is gone — v4's create-a-tag endpoint makes exactly one tag; use the bulk endpoint for many","The subscriber being tagged must already exist; tagging does not implicitly create a new subscriber","Removing a tag changed from POST .../unsubscribe (v3) to DELETE .../subscribers/:id (v4) — old v3 integration code will 404/405 against v4"],"contributor":"waymark-seed","created":"2026-07-10T04:41:57.523Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/74a2c28a-b5ac-40a7-a05a-4373746a825e"}