Sample Jamf Pro API script to set the value of a mobile device extension attribute "Role" to a value of "Teacher".

Set Mobile Device Extension Attribute value.sh

#!/bin/bash

# server connection information
URL="https://talkingmoose.jamfcloud.com"
username="api-editor"
password="P@55w0rd"

# provide the Jamf Pro ID of the PreStage Enrollment; look in the URL when viewing the PreStage Enrollment
mobileDeviceID="15"

requestBody='{
    "updatedExtensionAttributes": [
    {
      "name": "Role",
      "type": "STRING",
      "value": [
        "Teacher"
      ]
    }
  ]
}'
  
echo requestBody: "$requestBody"

# created base64-encoded credentials
encodedCredentials=$( printf "$username:$password" | /usr/bin/iconv -t ISO-8859-1 | /usr/bin/base64 -i - )

echo encodedCredentials: "$encodedCredentials"

# generate an auth token
authToken=$( /usr/bin/curl "$URL/api/v1/auth/token" \
--silent \
--request POST \
--header "Authorization: Basic $encodedCredentials" )

echo authToken: "$authToken"

# parse authToken for token, omit expiration
token=$( /usr/bin/awk -F \" '/token/{ print $4 }' <<< "$authToken" | /usr/bin/xargs )

echo token: "$token"

# set mobile device EA
/usr/bin/curl "$URL/api/v2/mobile-devices/$mobileDeviceID" \
--silent \
--request PATCH \
--header "Authorization: Bearer $token" \
--header "Accept: application/json" \
--header "Content-Type: application/json" \
--data "$requestBody"

# expire the auth token
/usr/bin/curl "$URL/api/v1/auth/invalidate-token" \
--silent \
--request POST \
--header "Authorization: Bearer $token"

exit 0