63017: Rate limit exceeded

Twilio returns this error when your account or subaccounts send messages at a combined rate higher than 2000 messages per second.

• Your account or subaccounts are sending messages faster than the combined 2000 messages-per-second limit.
• Your traffic burst exceeds the throughput available for your sender or Messaging Service configuration. Twilio measures throughput per phone number, per second, and queues messages when requests exceed the prescribed rate limit.

• Slow down message submission so combined account and subaccount traffic stays below 2000 messages per second.
• Queue large sends and use Messaging Services when you need to enqueue a large number of messages. Twilio queues messages at your prescribed rate limit and executes excess requests as capacity becomes available.
• Plan your senders and traffic timing around the MPS you need, then build in extra buffer for carrier capacity changes.
• If you have a large emergency or sustained high-volume use case, reach out to Twilio to discuss adjusting the limits applied to your account, senders, or Messaging Services.

• Messages resource
• Account Based Throughput Overview
• Build to scale: queueing and latency on Twilio