diff --git a/Application/CommentLink/CommentLinkCommand.cs b/Application/CommentLink/CommentLinkCommand.cs
index 233be2a..a75abb6 100644
--- a/Application/CommentLink/CommentLinkCommand.cs
+++ b/Application/CommentLink/CommentLinkCommand.cs
@@ -18,9 +18,10 @@ namespace HN.Application
 
     }
 
-    public CommentLinkCommand(Guid linkId)
+    public CommentLinkCommand(Guid linkId, string content = null)
     {
       LinkId = linkId;
+      Content = content;
     }
   }
 }
\ No newline at end of file
diff --git a/Apps/Api/Controllers/LinksController.cs b/Apps/Api/Controllers/LinksController.cs
index 9c2671b..9fe3cdb 100644
--- a/Apps/Api/Controllers/LinksController.cs
+++ b/Apps/Api/Controllers/LinksController.cs
@@ -1,5 +1,8 @@
+using System;
 using System.Threading.Tasks;
+using Api.Models;
 using HN.Application;
+using HN.Domain;
 using MediatR;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
@@ -18,7 +21,7 @@ namespace Api.Controllers
     }
 
     /// <summary>
-    /// Retrieve all links already posted.
+    /// Récupère tous les liens postés.
     /// </summary>
     /// <returns></returns>
     [ProducesResponseType(typeof(LinkDto[]), StatusCodes.Status200OK)]
@@ -29,7 +32,68 @@ namespace Api.Controllers
     }
 
     /// <summary>
-    /// Post a new link.
+    /// Récupère um lien particulier.
+    /// </summary>
+    /// <param name="id"></param>
+    [HttpGet("{id}")]
+    public async Task<ActionResult<LinkDto>> GetLinkById(Guid id)
+    {
+      return Ok(await _bus.Send(new GetLinkQuery(id)));
+    }
+
+    /// <summary>
+    /// Upvote un lien particulier.
+    /// </summary>
+    /// <param name="id"></param>
+    /// <returns></returns>
+    [HttpPut("{id}/upvote")]
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    public async Task<IActionResult> Upvote(Guid id)
+    {
+      await _bus.Send(new VoteForLinkCommand(id, VoteType.Up));
+      return NoContent();
+    }
+
+    /// <summary>
+    /// Downvote un lien particulier.
+    /// </summary>
+    /// <param name="id"></param>
+    /// <returns></returns>
+    [HttpPut("{id}/downvote")]
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    public async Task<IActionResult> Downvote(Guid id)
+    {
+      await _bus.Send(new VoteForLinkCommand(id, VoteType.Down));
+      return NoContent();
+    }
+
+    /// <summary>
+    /// Récupère les commentaires d'un lien particulier.
+    /// </summary>
+    /// <param name="id"></param>
+    /// <returns></returns>
+    [HttpGet("{id}/comments")]
+    public async Task<ActionResult<CommentDto[]>> Comments(Guid id)
+    {
+      return Ok(await _bus.Send(new GetLinkCommentsQuery(id)));
+    }
+
+    /// <summary>
+    /// Poste un nouveau commentaire sur un lien.
+    /// </summary>
+    /// <param name="id"></param>
+    /// <param name="command"></param>
+    /// <returns></returns>
+    [HttpPost("{id}/comments")]
+    [ProducesResponseType(StatusCodes.Status201Created)]
+    public async Task<IActionResult> AddComment(Guid id, AddCommentViewModel command)
+    {
+      var commentId = await _bus.Send(new CommentLinkCommand(id, command.Content));
+      return CreatedAtAction("", "", new { id = commentId }, null);
+    }
+
+    /// <summary>
+    /// Poste un nouveau lien.
     /// </summary>
     /// <param name="command"></param>
     /// <returns></returns>
@@ -38,7 +102,7 @@ namespace Api.Controllers
     {
       var result = await _bus.Send(command);
 
-      return Created("blabla", result);
+      return CreatedAtAction(nameof(GetLinkById), new { id = result });
     }
   }
 }
\ No newline at end of file
diff --git a/Apps/Api/Models/AddCommentViewModel.cs b/Apps/Api/Models/AddCommentViewModel.cs
new file mode 100644
index 0000000..3216a7e
--- /dev/null
+++ b/Apps/Api/Models/AddCommentViewModel.cs
@@ -0,0 +1,10 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Api.Models
+{
+  public sealed class AddCommentViewModel
+  {
+    [Required]
+    public string Content { get; set; }
+  }
+}
\ No newline at end of file
diff --git a/Apps/Api/swagger.json b/Apps/Api/swagger.json
index 248b757..cdc6792 100644
--- a/Apps/Api/swagger.json
+++ b/Apps/Api/swagger.json
@@ -11,7 +11,7 @@
         "tags": [
           "Links"
         ],
-        "summary": "Retrieve all links already posted.",
+        "summary": "Récupère tous les liens postés.",
         "operationId": "Links_GetLinks",
         "responses": {
           "200": {
@@ -43,7 +43,7 @@
         "tags": [
           "Links"
         ],
-        "summary": "Post a new link.",
+        "summary": "Poste un nouveau lien.",
         "operationId": "Links_CreateLink",
         "requestBody": {
           "x-name": "command",
@@ -71,6 +71,163 @@
           }
         }
       }
+    },
+    "/api/links/{id}": {
+      "get": {
+        "tags": [
+          "Links"
+        ],
+        "summary": "Récupère um lien particulier.",
+        "operationId": "Links_GetLinkById",
+        "parameters": [
+          {
+            "name": "id",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string",
+              "format": "guid"
+            },
+            "x-position": 1
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/LinkDto"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
+    "/api/links/{id}/upvote": {
+      "put": {
+        "tags": [
+          "Links"
+        ],
+        "summary": "Upvote un lien particulier.",
+        "operationId": "Links_Upvote",
+        "parameters": [
+          {
+            "name": "id",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string",
+              "format": "guid"
+            },
+            "x-position": 1
+          }
+        ],
+        "responses": {
+          "204": {
+            "description": ""
+          }
+        }
+      }
+    },
+    "/api/links/{id}/downvote": {
+      "put": {
+        "tags": [
+          "Links"
+        ],
+        "summary": "Downvote un lien particulier.",
+        "operationId": "Links_Downvote",
+        "parameters": [
+          {
+            "name": "id",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string",
+              "format": "guid"
+            },
+            "x-position": 1
+          }
+        ],
+        "responses": {
+          "204": {
+            "description": ""
+          }
+        }
+      }
+    },
+    "/api/links/{id}/comments": {
+      "get": {
+        "tags": [
+          "Links"
+        ],
+        "summary": "Récupère les commentaires d'un lien particulier.",
+        "operationId": "Links_Comments",
+        "parameters": [
+          {
+            "name": "id",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string",
+              "format": "guid"
+            },
+            "x-position": 1
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "array",
+                  "items": {
+                    "$ref": "#/components/schemas/CommentDto"
+                  }
+                }
+              }
+            }
+          }
+        }
+      },
+      "post": {
+        "tags": [
+          "Links"
+        ],
+        "summary": "Poste un nouveau commentaire sur un lien.",
+        "operationId": "Links_AddComment",
+        "parameters": [
+          {
+            "name": "id",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string",
+              "format": "guid"
+            },
+            "x-position": 1
+          }
+        ],
+        "requestBody": {
+          "x-name": "command",
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/AddCommentViewModel"
+              }
+            }
+          },
+          "required": true,
+          "x-position": 2
+        },
+        "responses": {
+          "201": {
+            "description": ""
+          }
+        }
+      }
     }
   },
   "components": {
@@ -139,6 +296,45 @@
           }
         }
       },
+      "CommentDto": {
+        "type": "object",
+        "additionalProperties": false,
+        "properties": {
+          "id": {
+            "type": "string",
+            "format": "guid"
+          },
+          "content": {
+            "type": "string",
+            "nullable": true
+          },
+          "createdAt": {
+            "type": "string",
+            "format": "date-time"
+          },
+          "upVotes": {
+            "type": "integer",
+            "format": "int32"
+          },
+          "downVotes": {
+            "type": "integer",
+            "format": "int32"
+          }
+        }
+      },
+      "AddCommentViewModel": {
+        "type": "object",
+        "additionalProperties": false,
+        "required": [
+          "content"
+        ],
+        "properties": {
+          "content": {
+            "type": "string",
+            "minLength": 1
+          }
+        }
+      },
       "AddLinkCommand": {
         "type": "object",
         "additionalProperties": false,