Max Amount of API requests?

[nicola...@maine.edu]

I have noticed that in my PHP code after several API requests the code seems to begin to return no information. Then, if I wait half an hour to an hour it seems to start working again. This process just continues over and over again.

Therefore! My question is:

Does the Canvas API only allow a certain amount of API requests every x amount of time?

[Midiman]

If you're asking about the cloud instances of Canvas provided by Instructure, the word on the street is that it's 3000 requests/hr. Does your code exceed that amount?

It would be good to get someone from Instructure on this thread to confirm that number.

[Michael Ball]

I've seen this page:

http://www.instructure.com/policies/api-policy

I'm currently working on some scripts to automate posting grades and it currently is having trouble where about half the requests in a row fail. Then if I wait a few seconds, they work. I'm not sure if it's canvas or something else, but I'm not getting much in the way of error messages other than "an error occurred". 

On Monday, September 8, 2014 11:06:42 AM UTC-7, nicola...@maine.edu wrote:

[Cody Cutrer]

https://github.com/instructure/canvas-lms/blob/stable/lib/canvas/request_throttle.rb is the logic for throttling. It's a leaky bucket algorithm, rather than a flat "x requests/hour". If that's what you're hitting, you'll be getting a 403 response, with a specific message saying "Rate Limit Exceeded".

Cody Cutrer

Software Engineer

Instructure

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[Randall Anderson]

Cody,

Are errors tided to individual access tokens? That is, is any single token only allowed to make so many calls in a certain amount of time?

I have vendor who is requesting additional tokens as they are seeing a lot error messages?

Randall

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Respectfully Serving
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Randall A. Anderson, M.Ed.
Programming Analyst Instructional Systems
Information Technology Services
Maricopa Community Colleges
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[Cody Cutrer]

Randall,

Yes, errors are counted against the access token's bucket just like any other request. The only case would be if the error was with authenticating the token itself, at which point the request would count against the IP, instead of the (unfound) access token.

Cody Cutrer

Software Engineer

Instructure

[Randall Anderson]

thank you...r