How to use the SendGrid V3 API

Welcome to SendGrid’s Web API v3! This API is RESTful, fully featured, easy to integrate with, and offers support in 7 different languages.


Rate Limits

Rate Limit Response Header

All calls within the Web API are allotted a specific number of requests per refresh period.

Each Web API request returns the following header information regarding rate limits and number of requests left.

Depending on the endpoint you are trying to reach, it will have a specific number of allowed requests per refresh period. Once this threshold has been reached, we will return a status code 429 response.


HTTP/1.1 200 OK
Content-Type: application/json
X-RateLimit-Limit: 500
X-RateLimit-Remaining: 499
X-RateLimit-Reset: 1392815263

  "foo": "bar"

When You Reach a Rate Limit

You will no longer be able to make request against that endpoint for the duration of that refresh period.


Content-Type: application/json
X-RateLimit-Limit: 150
X-RateLimit-Remaining: 0
X-RateLimit-Reset: 1392815263

  "errors": [
      "field": null,
       "message": "too many requests"
Rate this page:

Need some help?

We all do sometimes; code is hard. Get help now from our support team, or lean on the wisdom of the crowd browsing the SendGrid tag on Stack Overflow.

Thank you for your feedback!

We are always striving to improve our documentation quality, and your feedback is valuable to us. How could this documentation serve you better?

Sending your feedback...
🎉 Thank you for your feedback!
Something went wrong. Please try again.

Thanks for your feedback!

Refer us and get $10 in 3 simple steps!

Step 1

Get link

Get a free personal referral link here

Step 2

Give $10

Your user signs up and upgrade using link

Step 3

Get $10

1,250 free SMSes
OR 1,000 free voice mins
OR 12,000 chats
OR more