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Lettr

Interact with Lettr transactional email APIs

Audience Contact → Bulk Attach to Lists

AI-generated

Summary

Attach multiple contacts to multiple audience lists in one bulk request. Provide comma-, semicolon-, or newline-separated contact IDs and list IDs.

Inputs

  • Contact IDs (required) — Contact IDs, separated by commas, semicolons, or newlines.
  • List IDs (required) — Audience list IDs, separated by commas, semicolons, or newlines.

Output shape

A list of items containing the API response data.

The supplied source pack shows only function signatures, so it does not establish the exact response fields or whether the operation simplifies the API response.

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