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Documentation Index

Fetch the complete documentation index at: https://docs.isend.ai/llms.txt

Use this file to discover all available pages before exploring further.

Understand rate limits and how to increase them when using the isend.ai API.
The isend.ai API uses response headers to indicate your current rate limit status, following the IETF standard:
Header nameDescription
ratelimit-limitMaximum number of requests allowed within a window.
ratelimit-remainingHow many requests you have left within the current window.
ratelimit-resetHow many seconds until the limits are reset.
retry-afterHow many seconds you should wait before making a follow-up request.
The default rate limit is 2 requests per second. Trusted senders may request an increase. If you exceed the rate limit, the API will return a 429 response error. To review these events, filter for status 429 in your isend.ai logs.

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Tips to Avoid Rate Limits

  • Implement a queueing system for API calls.
  • Throttle or stagger requests to prevent bursts.
  • Avoid sending requests concurrently unless necessary.
  • Monitor your usage through headers in API responses.
If you have unique needs or expect higher traffic, contact our support team to request a rate increase.