diff --git a/pom.xml b/pom.xml
index f6eb2d0..767ca4c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -21,6 +21,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <spring-boot-dependencies.version>3.3.4</spring-boot-dependencies.version>
         <spring-boot-maven-plugin.version>3.3.4</spring-boot-maven-plugin.version>
+        <api-sdk-java.version>6.0.21</api-sdk-java.version>
         <structured-logging.version>3.0.20</structured-logging.version>
         <log4j.version>2.24.1</log4j.version>
         <jib-maven-plugin.version>3.4.2</jib-maven-plugin.version>
@@ -67,6 +68,11 @@
             <artifactId>structured-logging</artifactId>
             <version>${structured-logging.version}</version>
         </dependency>
+        <dependency>
+            <groupId>uk.gov.companieshouse</groupId>
+            <artifactId>api-sdk-java</artifactId>
+            <version>${api-sdk-java.version}</version>
+        </dependency>
 
         <!-- Test dependencies -->
         <dependency>
diff --git a/spec/schema.json b/spec/schema.json
index 759b260..32fcc52 100644
--- a/spec/schema.json
+++ b/spec/schema.json
@@ -1,32 +1,91 @@
 {
-  "swagger": "2.0",
+  "openapi": "3.0.1",
   "info": {
     "title": "Companies House - Limited Partnerships API",
-    "description": "An API to allow the registration, transition and update of limited partnerships",
+    "description": "An API to allow the registration, transition and update of Limited Partnerships",
     "version": "1.0.0"
   },
-  "host": "api.companieshouse.gov.uk",
+  "servers": [
+    {
+      "url": "https://api.companieshouse.gov.uk/"
+    }
+  ],
   "tags": [
     {
       "name": "Limited Partnerships"
     }
   ],
   "paths": {
+    "/transactions/{transaction_id}/limited-partnership/partnership": {
+      "post": {
+        "tags": [
+          "Limited Partnership"
+        ],
+        "summary": "Create a Limited Partnership submission",
+        "parameters": [
+          {
+            "name": "transaction_id",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "responses": {
+          "201": {
+            "description": "Limited Partnership Submission has been successfully created.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/LimitedPartnershipSubmissionCreatedResponse"
+                }
+              }
+            }
+          },
+          "400": {
+            "description": "Bad Request"
+          },
+          "401": {
+            "description": "Unauthorised"
+          },
+          "500": {
+            "description": "Internal Server Error"
+          }
+        }
+      }
+    },
     "/limited-partnership/healthcheck": {
       "get": {
         "summary": "Health check URL returns 200 if service is running",
-        "produces": [
-          "application/json"
-        ],
         "tags": [
-          "Limited Partnerships"
+          "Limited Partnership"
         ],
         "responses": {
           "200": {
-            "description": "Request has been received"
+            "description": "Request has been received",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "object"
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "schemas": {
+      "LimitedPartnershipSubmissionCreatedResponse": {
+        "type": "object",
+        "properties": {
+          "id": {
+            "type": "string"
           }
         }
       }
     }
   }
-}
\ No newline at end of file
+}
diff --git a/src/main/java/uk/gov/companieshouse/limitedpartnershipsapi/controller/PartnershipController.java b/src/main/java/uk/gov/companieshouse/limitedpartnershipsapi/controller/PartnershipController.java
new file mode 100644
index 0000000..61f1a40
--- /dev/null
+++ b/src/main/java/uk/gov/companieshouse/limitedpartnershipsapi/controller/PartnershipController.java
@@ -0,0 +1,30 @@
+package uk.gov.companieshouse.limitedpartnershipsapi.controller;
+
+import jakarta.servlet.http.HttpServletRequest;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import uk.gov.companieshouse.limitedpartnershipsapi.model.dto.LimitedPartnershipSubmissionCreatedResponseDto;
+import uk.gov.companieshouse.limitedpartnershipsapi.utils.ApiLogger;
+
+import java.net.URI;
+
+import static uk.gov.companieshouse.limitedpartnershipsapi.utils.Constants.URL_PARAM_TRANSACTION_ID;
+
+@RestController
+@RequestMapping("/transactions/{" + URL_PARAM_TRANSACTION_ID + "}/limited-partnership/partnership")
+public class PartnershipController {
+
+    @PostMapping
+    public ResponseEntity<Object> createPartnership(
+            HttpServletRequest request) {
+
+        ApiLogger.debug("createPartnership");
+
+        URI location = URI.create("/transactions/12321123/limited-partnership/partnership/3235233232");
+        LimitedPartnershipSubmissionCreatedResponseDto response = new LimitedPartnershipSubmissionCreatedResponseDto();
+        response.setId("3235233232");
+        return ResponseEntity.created(location).body(response);
+    }
+}
diff --git a/src/main/java/uk/gov/companieshouse/limitedpartnershipsapi/model/dto/LimitedPartnershipSubmissionCreatedResponseDto.java b/src/main/java/uk/gov/companieshouse/limitedpartnershipsapi/model/dto/LimitedPartnershipSubmissionCreatedResponseDto.java
new file mode 100644
index 0000000..1b91dc2
--- /dev/null
+++ b/src/main/java/uk/gov/companieshouse/limitedpartnershipsapi/model/dto/LimitedPartnershipSubmissionCreatedResponseDto.java
@@ -0,0 +1,17 @@
+package uk.gov.companieshouse.limitedpartnershipsapi.model.dto;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class LimitedPartnershipSubmissionCreatedResponseDto {
+
+    @JsonProperty("id")
+    private String id;
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+}
diff --git a/src/main/java/uk/gov/companieshouse/limitedpartnershipsapi/utils/Constants.java b/src/main/java/uk/gov/companieshouse/limitedpartnershipsapi/utils/Constants.java
index 101d552..34bdcde 100644
--- a/src/main/java/uk/gov/companieshouse/limitedpartnershipsapi/utils/Constants.java
+++ b/src/main/java/uk/gov/companieshouse/limitedpartnershipsapi/utils/Constants.java
@@ -6,4 +6,7 @@ private Constants() { }
 
     // Request header names
     public static final String ERIC_REQUEST_ID_KEY = "X-Request-Id";
+
+    // URL path parameters
+    public static final String URL_PARAM_TRANSACTION_ID = "transaction_id";
 }
diff --git a/src/test/java/uk/gov/companieshouse/limitedpartnershipsapi/controller/PartnershipControllerTest.java b/src/test/java/uk/gov/companieshouse/limitedpartnershipsapi/controller/PartnershipControllerTest.java
new file mode 100644
index 0000000..df2e2c8
--- /dev/null
+++ b/src/test/java/uk/gov/companieshouse/limitedpartnershipsapi/controller/PartnershipControllerTest.java
@@ -0,0 +1,37 @@
+package uk.gov.companieshouse.limitedpartnershipsapi.controller;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.mock.web.MockHttpServletRequest;
+import uk.gov.companieshouse.limitedpartnershipsapi.model.dto.LimitedPartnershipSubmissionCreatedResponseDto;
+
+import java.util.Objects;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+@ExtendWith(MockitoExtension.class)
+class PartnershipControllerTest {
+
+    @InjectMocks
+    private PartnershipController partnershipController;
+
+    @Mock
+    private MockHttpServletRequest mockHttpServletRequest;
+
+    @Test
+    void testCreatePartnership() {
+        var response = partnershipController.createPartnership(mockHttpServletRequest);
+
+        assertEquals(HttpStatus.CREATED.value(), response.getStatusCode().value());
+        var responseHeaderLocation = Objects.requireNonNull(response.getHeaders().get(HttpHeaders.LOCATION)).getFirst();
+        assertEquals("/transactions/12321123/limited-partnership/partnership/3235233232", responseHeaderLocation);
+        LimitedPartnershipSubmissionCreatedResponseDto responseBody = (LimitedPartnershipSubmissionCreatedResponseDto) response.getBody();
+        assert responseBody != null;
+        assertEquals("3235233232", responseBody.getId());
+    }
+}