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Developers

Changelog

Changes developers would notice, newest first. Fields are only ever added to answers, never renamed or removed.

  1. SMS API and webhooks

    • POST /v1/sms/messages sends to up to 100 numbers, with plain text or an SMS template.
    • Read messages, sender IDs, templates and the balance.
    • Test keys (fz_test_) that never send and cost nothing.
    • Signed webhooks: sms.sent, sms.delivered and sms.failed.
    • Idempotency-Key on sends; 409 IDEMPOTENCY_IN_PROGRESS while a repeated request is still running.
    • Limits: 100 requests per 10 seconds per key and 300 per organization; 50,000 waiting messages per organization (QUEUE_FULL); 5,000 test-key recipients a day (TEST_LIMIT_REACHED).