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Chapter 3. Accessing available subscription management APIs
Red Hat provides a Swagger file to describe the specifications of the Red Hat Subscription Management APIs. The Swagger specification includes information about the API endpoints available, input parameters, expected output, and possible error responses. The swagger file can be imported into REST clients like Postman or RESTlet to automatically build a library of API calls.
3.1. Troubleshooting API errors
3.2. API errors
| Code | Explanation | Resolution |
|---|---|---|
| 400 | BadRequest error | Validate that you entered the API call correctly and try again. |
| 401 | Unauthorized | Generate a new authorization token. |
| 403 | Forbidden | Generate a new authorization token. |
| 404 | Not found | Resource not found or does not exist. |
| 429 | Too many requests | Reduce the frequency of requests |
| 500 | Internal server error | The problem is on Red Hat’s end. Wait a minute and try your request again. |
3.3. Troubleshooting error 403
Error 403 is a "not authorized" error, meaning that the authentication you are using for Red Hat Subscription Manager APIs has failed. There are two possible solutions you can try.
Procedure
To authenticate through the Red Hat Subscription Manager gateway, ensure the authorization header includes the text "bearer" before entering your API call:
curl -H "Authorization: Bearer <token>" <api_url>
curl -H "Authorization: Bearer <token>" <api_url>Copy to Clipboard Copied! Toggle word wrap Toggle overflow - If the header is correct, create a new token. Refresh tokens last for five minutes.
3.4. Troubleshooting error 429
Error 429 is a “rate limiting” error, meaning that your account has exceeded the number of allowed requests per second. This limit applies to all users of a single Red Hat account.
Procedure
Extract the header of the response, which includes: * X-RateLimit-Limit: the total requests/sec allowed * X-RateLimit-Remaining: the number of requests/sec remaining (this will be a negative integer) * X-RateLimit-Delay: the number of seconds the requester should wait before trying again
Adjust the rate of requests to the X-RateLimit-Limit value and start again once the X-RateLimit-Delay time has passed.
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