List Message Headers by Recipient

documented

Retrieve headers for messages sent to a particular recipient.

GET /v1.0/messageheaders?to={phone}&start={start}&finish={finish}SMS APIno implementation yet0 runs

Input

phone

Recipient phone number (E.164)

+15551234567

start

Start date (UTC, ISO 8601)

2026-02-01T00:00:00Z

finish

Finish date (UTC, ISO 8601)

2026-02-02T00:00:00Z

Calls Esendex as you (your API key is your account); keychains.dev holds the credentials.