Warning!

Error: HTTP 400 Bad Request: HAPI-0287: This is the base URL of FHIR server. Unable to handle this request, as it does not contain a resource type or operation name.

Executed request against FHIR RESTful server in 14ms

Client Code - Use the following code snippet to execute this action in your own client.

Request	GET http://hapi.fhir.org/baseR4/
Request Headers	Accept: application/fhir+xml;q=1.0, application/fhir+json;q=1.0, application/xml+fhir;q=0.9, application/json+fhir;q=0.9 User-Agent: HAPI-FHIR/8.9.4-SNAPSHOT (FHIR Client; FHIR 4.0.1/R4; apache) Accept-Encoding: gzip

Response

HTTP 400 Bad Request

Response Headers

x-request-id: 1jfP7lHzOjb7iivR

date: Wed, 11 Mar 2026 09:38:56 GMT

server: nginx/1.24.0 (Ubuntu)

transfer-encoding: chunked

x-powered-by: HAPI FHIR 8.9.4-SNAPSHOT/eee190b153/2026-02-26 REST Server (FHIR Server; FHIR 4.0.1/R4)

connection: keep-alive

content-type: application/fhir+json;charset=utf-8

Result Narrative

Operation Outcome

ERROR

[]

HAPI-0287: This is the base URL of FHIR server. Unable to handle this request, as it does not contain a resource type or operation name.

Result Body (641 bytes)

Payload

...loading...

{
  "resourceType": "OperationOutcome",
  "text": {
    "status": "generated",
    "div": "<div xmlns=\"http://www.w3.org/1999/xhtml\"><h1>Operation Outcome</h1><table border=\"0\"><tr><td style=\"font-weight: bold;\">ERROR</td><td>[]</td><td>HAPI-0287: This is the base URL of FHIR server. Unable to handle this request, as it does not contain a resource type or operation name.</td></tr></table></div>"
  },
  "issue": [ {
    "severity": "error",
    "code": "processing",
    "diagnostics": "HAPI-0287: This is the base URL of FHIR server. Unable to handle this request, as it does not contain a resource type or operation name."
  } ]
}

Options

Server

Resources

Operation Outcome