curl -X POST "https://api.haau3.com/v1/fhir/r4/ValueSet/\$expand" \
  -H "Authorization: Bearer $HAAU3_API_KEY" \
  -H "Content-Type: application/fhir+json" \
  -d '{
    "resourceType": "Parameters",
    "parameter": [{ "name": "url", "valueUri": "http://loinc.org/vs/LL360-9" }]
  }'

import { Haau3 } from "@haau3/sdk";

const haau3 = new Haau3(); // reads HAAU3_API_KEY
const valueSet = await haau3.valueSetExpandPost({
  resourceType: "Parameters",
  parameter: [{ name: "url", valueUri: "http://loinc.org/vs/LL360-9" }],
});
console.log(valueSet.id);

from haau3 import Haau3

client = Haau3()  # reads HAAU3_API_KEY
value_set = client.value_set_expand_post(
    {"resourceType": "Parameters", "parameter": [{"name": "url", "valueUri": "http://loinc.org/vs/LL360-9"}]}
)
print(value_set.get("id"))

package main

import (
	"context"
	"fmt"
	"log"

	"github.com/haau3/haau3-go"
	"github.com/haau3/haau3-go/fhir"
)

func main() {
	ctx := context.Background()
	client, err := haau3.NewClient() // reads HAAU3_API_KEY
	if err != nil {
		log.Fatal(err)
	}
	valueSet, err := client.ValueSetExpandPost(ctx, &fhir.Parameters{
		Parameter: []fhir.ParametersParameter{
			{Name: new("url"), ValueURI: new("http://loinc.org/vs/LL360-9")},
		},
	})
	if err != nil {
		log.Fatal(err)
	}
	if valueSet.ID != nil {
		fmt.Println(*valueSet.ID)
	}
}

{
  "resourceType": "ValueSet",
  "id": "dc064ed9-6a62-48c7-b039-bea72c5348c3",
  "url": "http://loinc.org/vs/LL360-9",
  "identifier": [
    {
      "system": "urn:ietf:rfc:3986",
      "value": "urn:oid:1.3.6.1.4.1.12009.10.1.2247"
    }
  ],
  "version": "2.83",
  "name": "Pos|Neg",
  "status": "active",
  "publisher": "Regenstrief Institute, Inc.",
  "contact": [
    {
      "name": "Regenstrief Institute, Inc.",
      "telecom": [
        {
          "system": "url",
          "value": "http://loinc.org"
        }
      ]
    }
  ],
  "copyright": "This material contains content from LOINC (http://loinc.org). LOINC is copyright Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license. LOINC® is a registered United States trademark of Regenstrief Institute, Inc.",
  "expansion": {
    "id": "0e3930d7-e98e-4552-b45b-5760ed56409b",
    "identifier": "b4efb9d1-77f2-4bed-babe-3384083fc113",
    "timestamp": "2026-10-18T16:32:16+00:00",
    "total": 2,
    "offset": 0,
    "parameter": [
      {
        "name": "offset",
        "valueInteger": 0
      },
      {
        "name": "count",
        "valueInteger": 100
      }
    ],
    "contains": [
      {
        "system": "http://loinc.org",
        "code": "LA6577-6",
        "display": "Negative"
      },
      {
        "system": "http://loinc.org",
        "code": "LA6576-8",
        "display": "Positive"
      }
    ]
  }
}

{
  "resourceType": "OperationOutcome",
  "issue": [
    {
      "severity": "fatal",
      "code": "<string>",
      "details": {
        "text": "<string>"
      },
      "diagnostics": "<string>",
      "expression": [
        "<string>"
      ]
    }
  ]
}

{
  "resourceType": "OperationOutcome",
  "issue": [
    {
      "severity": "fatal",
      "code": "<string>",
      "details": {
        "text": "<string>"
      },
      "diagnostics": "<string>",
      "expression": [
        "<string>"
      ]
    }
  ]
}

{
  "resourceType": "OperationOutcome",
  "issue": [
    {
      "severity": "error",
      "code": "forbidden",
      "details": {
        "coding": [
          {
            "system": "https://haau3.com/fhir/CodeSystem/api-error",
            "code": "test-key-outside-sandbox",
            "display": "Test key outside the Sandbox"
          }
        ],
        "text": "This is a test key, which works only in the Sandbox (https://api.haau3.com/v1/sandbox/fhir/r4). Send this request with a live key; create one in the dashboard. See https://docs.haau3.com/authentication#test-and-live-keys"
      }
    }
  ]
}

{
  "resourceType": "OperationOutcome",
  "issue": [
    {
      "severity": "fatal",
      "code": "<string>",
      "details": {
        "text": "<string>"
      },
      "diagnostics": "<string>",
      "expression": [
        "<string>"
      ]
    }
  ]
}

{
  "resourceType": "OperationOutcome",
  "issue": [
    {
      "severity": "fatal",
      "code": "<string>",
      "details": {
        "text": "<string>"
      },
      "diagnostics": "<string>",
      "expression": [
        "<string>"
      ]
    }
  ]
}

{
  "resourceType": "OperationOutcome",
  "issue": [
    {
      "severity": "fatal",
      "code": "<string>",
      "details": {
        "text": "<string>"
      },
      "diagnostics": "<string>",
      "expression": [
        "<string>"
      ]
    }
  ]
}

{
  "resourceType": "OperationOutcome",
  "issue": [
    {
      "severity": "fatal",
      "code": "<string>",
      "details": {
        "text": "<string>"
      },
      "diagnostics": "<string>",
      "expression": [
        "<string>"
      ]
    }
  ]
}

{
  "resourceType": "OperationOutcome",
  "issue": [
    {
      "severity": "fatal",
      "code": "<string>",
      "details": {
        "text": "<string>"
      },
      "diagnostics": "<string>",
      "expression": [
        "<string>"
      ]
    }
  ]
}

{
  "resourceType": "OperationOutcome",
  "issue": [
    {
      "severity": "fatal",
      "code": "<string>",
      "details": {
        "text": "<string>"
      },
      "diagnostics": "<string>",
      "expression": [
        "<string>"
      ]
    }
  ]
}

{
  "resourceType": "OperationOutcome",
  "issue": [
    {
      "severity": "fatal",
      "code": "<string>",
      "details": {
        "text": "<string>"
      },
      "diagnostics": "<string>",
      "expression": [
        "<string>"
      ]
    }
  ]
}

{
  "resourceType": "OperationOutcome",
  "issue": [
    {
      "severity": "fatal",
      "code": "<string>",
      "details": {
        "text": "<string>"
      },
      "diagnostics": "<string>",
      "expression": [
        "<string>"
      ]
    }
  ]
}

{
  "resourceType": "OperationOutcome",
  "issue": [
    {
      "severity": "fatal",
      "code": "<string>",
      "details": {
        "text": "<string>"
      },
      "diagnostics": "<string>",
      "expression": [
        "<string>"
      ]
    }
  ]
}

{
  "resourceType": "OperationOutcome",
  "issue": [
    {
      "severity": "fatal",
      "code": "<string>",
      "details": {
        "text": "<string>"
      },
      "diagnostics": "<string>",
      "expression": [
        "<string>"
      ]
    }
  ]
}