Quick guide on how to use the NBA REST API.  

Executing an NBA Strategy for a Given Record

Official documentation: https://developer.salesforce.com/docs/atlas.en-us.chatterapi.meta/chatterapi/connect_resources_nba_recommendations.htm

Example:

POST

/services/data/v45.0/connect/recommendation-strategies/Jasmine_Yogurt_Service/recommendations

Body:

{
"contextRecordId" : "5001U000006XEpjQAG", 
"maxResults" : 4,
"strategyContext":{}
}

Response:

Raw Response (in JSON):

{
   "executionId":"23e8f474-6fec-4b5d-b2b5-667ef7ffb03a",
   "onBehalfOfId":"5001U000006XEpj",
   "recommendations":[
      {
         "acceptanceLabel":"Add Hot Waffle Press",
         "description":"Add a new Stanley Waffle Cone Press",
         "imageUrl":"https://isnba--c.documentforce.com/file-asset-public/WaffleMaker1?oid=00D1U0000012w03&v=1",
         "rejectionLabel":"No Thanks",
         "target":{
            "id":"0pr1U00000057IYQAY",
            "name":"Add a Hot Waffle Press",
            "type":"Recommendation",
            "url":"/services/data/v45.0/connect/recommendations/0pr1U00000057IY"
         },
         "targetAction":{
            "id":"3001U000000oZixQAE",
            "name":"Dispatch_Field_Technician",
            "parameters":[

            ],
            "type":"Flow"
         }
      },
      {
         "acceptanceLabel":"Upgrade to an X120 Soft Serve",
         "description":"Upgrade to a Twenty Gallon Single Nozzle Soft Serve Machine",
         "imageUrl":"https://isnba--c.documentforce.com/file-asset-public/SoftServeMaker1?oid=00D1U0000012w03&v=1",
         "rejectionLabel":"No Thanks",
         "target":{
            "id":"0pr1U00000057IXQAY",
            "name":"Upgrade to an X120 Soft Serve",
            "type":"Recommendation",
            "url":"/services/data/v45.0/connect/recommendations/0pr1U00000057IX"
         },
         "targetAction":{
            "id":"3001U000000oZixQAE",
            "name":"Dispatch_Field_Technician",
            "parameters":[

            ],
            "type":"Flow"
         }
      },
      {
         "acceptanceLabel":"Offer refinance",
         "description":"0% Refinancing on existing equipment",
         "imageUrl":"https://isnba--c.documentforce.com/file-asset-public/refinance?oid=00D1U0000012w03&v=1",
         "rejectionLabel":"No Thanks",
         "target":{
            "id":"0pr1U00000057IZQAY",
            "name":"0% Refinancing!",
            "type":"Recommendation",
            "url":"/services/data/v45.0/connect/recommendations/0pr1U00000057IZ"
         },
         "targetAction":{
            "id":"3001U000000oZixQAE",
            "name":"Dispatch_Field_Technician",
            "parameters":[

            ],
            "type":"Flow"
         }
      }
   ],
   "trace":{
      "messages":[

      ],
      "nodes":[

      ]
   }
}

Retrieving Recommendation Reactions

Official documentation– https://developer.salesforce.com/docs/atlas.en-us.chatterapi.meta/chatterapi/connect_resources_nba_reactions.htm#connect_resources_nba_reactions

Example:

GET

/services/data/v45.0/connect/recommendation-strategies/reactions?targetId=0pr1U00000057IUQAY

This will return back all of the recommendations reactions for the recommendation with ID 0pr1U00000057IUQAY.

Similarly you can also query for the contextRecordId (e.g. Case with ID 5001U000006XEpjQAG, account, etc.)

GET

/services/data/v45.0/connect/recommendation-strategies/reactions/?contextRecordId=5001U000006XEpjQAG

RAW RESPONSE:

{
   "currentPageUrl":"/services/data/v45.0/connect/recommendation-strategies/reactions?page=0&pageSize=100",
   "nextPageUrl":"/services/data/v45.0/connect/recommendation-strategies/reactions?page=1&pageSize=100",
   "reactions":[
      {
         "contextRecord":{
            "id":"5001U000006XEpjQAG",
            "url":"/services/data/v45.0/chatter/records/5001U000006XEpjQAG"
         },
         "createdBy":{
            "id":"0051U000004fPpPQAU",
            "url":"/services/data/v45.0/chatter/users/0051U000004fPpPQAU"
         },
         "createdDate":"2019-02-28T19:13:43.000Z",
         "id":"0ps1U000000TNzxQAG",
         "onBehalfOf":{
            "id":"5001U000006XEpjQAG",
            "url":"/services/data/v45.0/chatter/records/5001U000006XEpjQAG"
         },
         "reactionType":"Accepted",
         "strategy":{
            "id":"0sg1U0000004edzQAA",
            "nameAtSnapshot":"Jasmine_Yogurt_Service"
         },
         "targetAction":{
            "id":"3001U000000oZixQAE",
            "nameAtSnapshot":"Dispatch_Field_Technician"
         },
         "targetRecord":{
            "id":"0pr1U00000057IUQAY",
            "url":"/services/data/v45.0/connect/recommendations/0pr1U00000057IUQAY"
         },
         "url":"/services/data/v45.0/connect/recommendation-strategies/reactions/0ps1U000000TNzxQAG"
      },
      {
         "contextRecord":{
            "id":"5001U000006XEpjQAG",
            "url":"/services/data/v45.0/chatter/records/5001U000006XEpjQAG"
         },
         "createdBy":{
            "id":"0051U000004fPpPQAU",
            "url":"/services/data/v45.0/chatter/users/0051U000004fPpPQAU"
         },
         "createdDate":"2019-02-28T19:13:43.000Z",
         "id":"0ps1U000000TNzyQAG",
         "onBehalfOf":{
            "id":"5001U000006XEpjQAG",
            "url":"/services/data/v45.0/chatter/records/5001U000006XEpjQAG"
         },
         "reactionType":"Accepted",
         "strategy":{
            "id":"0sg1U0000004edzQAA",
            "nameAtSnapshot":"Jasmine_Yogurt_Service"
         },
         "targetAction":{
            "id":"3001U000000oZixQAE",
            "nameAtSnapshot":"Dispatch_Field_Technician"
         },
         "targetRecord":{
            "id":"0pr1U00000057IUQAY",
            "url":"/services/data/v45.0/connect/recommendations/0pr1U00000057IUQAY"
         },
         "url":"/services/data/v45.0/connect/recommendation-strategies/reactions/0ps1U000000TNzyQAG"
      },
      {
         "contextRecord":{
            "id":"5001U000006XEpjQAG",
            "url":"/services/data/v45.0/chatter/records/5001U000006XEpjQAG"
         },
         "createdBy":{
            "id":"0051U000004fPpPQAU",
            "url":"/services/data/v45.0/chatter/users/0051U000004fPpPQAU"
         },
         "createdDate":"2019-02-28T19:13:43.000Z",
         "id":"0ps1U000000TNzzQAG",
         "onBehalfOf":{
            "id":"5001U000006XEpjQAG",
            "url":"/services/data/v45.0/chatter/records/5001U000006XEpjQAG"
         },
         "reactionType":"Accepted",
         "strategy":{
            "id":"0sg1U0000004edzQAA",
            "nameAtSnapshot":"Jasmine_Yogurt_Service"
         },
         "targetAction":{
            "id":"3001U000000oZixQAE",
            "nameAtSnapshot":"Dispatch_Field_Technician"
         },
         "targetRecord":{
            "id":"0pr1U00000057IUQAY",
            "url":"/services/data/v45.0/connect/recommendations/0pr1U00000057IUQAY"
         },
         "url":"/services/data/v45.0/connect/recommendation-strategies/reactions/0ps1U000000TNzzQAG"
      },
      {
         "contextRecord":{
            "id":"5001U000006XEpjQAG",
            "url":"/services/data/v45.0/chatter/records/5001U000006XEpjQAG"
         },
         "createdBy":{
            "id":"0051U000004fPpPQAU",
            "url":"/services/data/v45.0/chatter/users/0051U000004fPpPQAU"
         },
         "createdDate":"2019-02-28T19:13:43.000Z",
         "id":"0ps1U000000TO00QAG",
         "onBehalfOf":{
            "id":"5001U000006XEpjQAG",
            "url":"/services/data/v45.0/chatter/records/5001U000006XEpjQAG"
         },
         "reactionType":"Accepted",
         "strategy":{
            "id":"0sg1U0000004edzQAA",
            "nameAtSnapshot":"Jasmine_Yogurt_Service"
         },
         "targetAction":{
            "id":"3001U000000oZixQAE",
            "nameAtSnapshot":"Dispatch_Field_Technician"
         },
         "targetRecord":{
            "id":"0pr1U00000057IUQAY",
            "url":"/services/data/v45.0/connect/recommendations/0pr1U00000057IUQAY"
         },
         "url":"/services/data/v45.0/connect/recommendation-strategies/reactions/0ps1U000000TO00QAG"
      },
      {
         "contextRecord":{
            "id":"5001U000006XEpjQAG",
            "url":"/services/data/v45.0/chatter/records/5001U000006XEpjQAG"
         },
         "createdBy":{
            "id":"0051U000004fPpPQAU",
            "url":"/services/data/v45.0/chatter/users/0051U000004fPpPQAU"
         },
         "createdDate":"2019-03-07T05:11:29.000Z",
         "id":"0ps1U000000TQzqQAG",
         "onBehalfOf":{
            "id":"5001U000006XEpjQAG",
            "url":"/services/data/v45.0/chatter/records/5001U000006XEpjQAG"
         },
         "reactionType":"Accepted",
         "strategy":{
            "id":"0sg1U0000004edzQAA",
            "nameAtSnapshot":"Jasmine_Yogurt_Service"
         },
         "targetAction":{
            "id":"3001U000000oZixQAE",
            "nameAtSnapshot":"Dispatch_Field_Technician"
         },
         "targetRecord":{
            "id":"0pr1U00000057IUQAY",
            "url":"/services/data/v45.0/connect/recommendations/0pr1U00000057IUQAY"
         },
         "url":"/services/data/v45.0/connect/recommendation-strategies/reactions/0ps1U000000TQzqQAG"
      },
      {
         "contextRecord":{
            "id":"5001U000006XEpjQAG",
            "url":"/services/data/v45.0/chatter/records/5001U000006XEpjQAG"
         },
         "createdBy":{
            "id":"0051U000004fPpPQAU",
            "url":"/services/data/v45.0/chatter/users/0051U000004fPpPQAU"
         },
         "createdDate":"2019-03-18T18:21:15.000Z",
         "id":"0ps1U000000TYoYQAW",
         "onBehalfOf":{
            "id":"5001U000006XEpjQAG",
            "url":"/services/data/v45.0/chatter/records/5001U000006XEpjQAG"
         },
         "reactionType":"Accepted",
         "strategy":{
            "id":"0sg1U0000004edzQAA",
            "nameAtSnapshot":"Jasmine_Yogurt_Service"
         },
         "targetAction":{
            "id":"3001U000000oZixQAE",
            "nameAtSnapshot":"Dispatch_Field_Technician"
         },
         "targetRecord":{
            "id":"0pr1U00000057IUQAY",
            "url":"/services/data/v45.0/connect/recommendations/0pr1U00000057IUQAY"
         },
         "url":"/services/data/v45.0/connect/recommendation-strategies/reactions/0ps1U000000TYoYQAW"
      }
   ]
}