{"openapi":"3.1.0","info":{"title":"Mekler newsletter subscriptions","version":"1.1.0","description":"Send me Mekler Agent Commerce Brief by email, weekly. I can unsubscribe at any time. Agents require address-owner authorization. Never infer consent from a sales contact. No payment or account required. POST changes state; GET never subscribes or unsubscribes."},"servers":[{"url":"https://api.mekler.ai"}],"paths":{"/v1/email/newsletter/request-subscription":{"post":{"operationId":"request_subscription","summary":"Subscribe immediately to the free weekly newsletter with explicit consent. No confirmation email is sent.","requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","additionalProperties":false,"required":["email","consent","consent_version"],"properties":{"email":{"type":"string","format":"email","maxLength":254},"consent":{"type":"boolean","const":true},"consent_version":{"type":"string","const":"weekly-brief-2026-10-28"}}}}}},"responses":{"200":{"description":"Action completed"},"409":{"description":"Concurrent update; retry the explicit request"},"400":{"description":"Invalid request or unsubscribe token"},"429":{"description":"Rate limited"},"503":{"description":"Temporarily unavailable; no subscription assumed"}}}},"/v1/email/newsletter/unsubscribe":{"post":{"operationId":"unsubscribe","summary":"Immediately suppress future newsletter sends; repeat requests are safe.","requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","additionalProperties":false,"required":["token"],"properties":{"token":{"type":"string","description":"Private capability from a newsletter email; do not disclose."}}}}}},"responses":{"200":{"description":"Action completed"},"409":{"description":"Concurrent update; retry the explicit request"},"400":{"description":"Invalid request or unsubscribe token"},"429":{"description":"Rate limited"},"503":{"description":"Temporarily unavailable; no subscription assumed"}}}}}}