v1
latestOpenAPI 3.1.02026-07-2670105729.6 KBContact Fields
Create a contact field
Creates a custom field definition ({ fieldName, fieldType: "string" | "number" | "date" | "bool" }). Returns 201 with the bare definition. (Contact upserts also auto-create unknown fields — explicit creation is for pinning the type up front.)
post/v1/fields
Headers
Idempotency-Keystring
Optional idempotency key for safe retries. Reusing the same key with the same request body returns the original response for 24 hours.
Request body
Response
Created.