user (User): The current user. Always available and equal to null if the request is anonymous.app (App): The Connect app that made the request. Available only for authenticated requests made by Connect Apps (read more here: Authentication for Connect apps).issue (Issue): The current issue. Available only when the issue is provided in the request context object.project (Project): The current project. Available only when the project is provided in the request context object.sprint (Sprint): The current sprint. Available only when the sprint is provided in the request context object.board (Board): The current board. Available only when the board is provided in the request context object.serviceDesk (ServiceDesk): The current service desk. Available only when the service desk is provided in the request context object.customerRequest (CustomerRequest): The current customer request. Available only when the customer request is provided in the request context object.user: A user specified as an Atlassian account ID.issue: An issue specified by ID or key. All the fields of the issue object are available in the Jira expression.json: A JSON object containing custom content.list: A JSON list of user, issue, or json variable types.board and sprint) or fields (for example, issue.sprint).curl --location --request POST '/rest/api/3/expression/eval' \
--header 'Content-Type: application/json' \
--data-raw '{
    "context": {
        "board": 10100,
        "custom": {
            "config": {
                "type": "json",
                "value": {
                    "userId": "10002"
                }
            },
            "issuesList": [
                {
                    "key": "ACJIRA-1471",
                    "type": "issue"
                },
                {
                    "id": 100001,
                    "type": "issue"
                }
            ],
            "myUser": {
                "accountId": "100001",
                "type": "user"
            },
            "nullField": {
                "type": "json"
            }
        },
        "customerRequest": 1450,
        "issue": {
            "key": "ACJIRA-1470"
        },
        "issues": {
            "jql": {
                "maxResults": 100,
                "query": "project = HSP",
                "startAt": 0,
                "validation": "strict"
            }
        },
        "project": {
            "key": "ACJIRA"
        },
        "serviceDesk": 10023,
        "sprint": 10001
    },
    "expression": "{ key: issue.key, type: issue.issueType.name, links: issue.links.map(link => link.linkedIssue.id), listCustomVariable: issuesList.includes(issue), customVariables: myUser.accountId == config.userId}"
}'{"value":"The expression's result. This value can be any JSON, not necessarily a String","meta":{"complexity":{"steps":{"value":1,"limit":10000},"expensiveOperations":{"value":3,"limit":10},"beans":{"value":0,"limit":1000},"primitiveValues":{"value":1,"limit":10000}},"issues":{"jql":{"startAt":0,"maxResults":1000,"count":140,"totalCount":140,"validationWarnings":["There is a problem with the JQL query."]}}}}