Waymark / Routes / developers.kit.com add a subscriber to a Kit form via the API
domain: developers.kit.com · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checked community attestations: 0✓ / 0✗
Steps POST email_address (and optional first_name, fields, referrer/UTM params) to https://api.kit.com/v4/forms/{form_id}/subscribers This creates the subscriber if they don't exist and records the form subscription in one call List a form's subscribers with GET /v4/forms/{form_id}/subscribers (cursor-paginated, replacing v3's /v3/forms/:id/subscriptions) Enumerate available forms and their ids first with GET /v4/forms Combine with the tags endpoints to segment form signups immediately after subscribing them Known gotchas v4 renamed the parameter from email to email_address — v3-style payloads using email fail validation The response shape no longer nests subscriber info under a "subscription" object as v3 did The target form must be published/active in Kit for API subscriptions to actually enroll the visitor in any associated sequence
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