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1. To access the REST-API Documentation, click on Help → REST API Documentation
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2. For the REST API queries, you will need to know what your metric IDs are.
   
   To find this information, first, go to Monitoring → All Host → and select your desired host. From here, click on the Check_MK service.
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3. Next, click on Display → Modify display options
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4. Now enable Show internal graph and metric IDs and click submit
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5. Scroll down this page and look for Service Metrics. You will see the Metric IDs on the right-hand side like the example below:
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Query via Web-API

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