Inbox replies are nested under the recording ID of a forward.
Endpoints:
GET /inbox_forwards/2/replies.jsonwill return a paginated list of inbox replies for the forward with ID of2.
[
{
"id": 1069479086,
"status": "active",
"visible_to_clients": false,
"created_at": "2025-11-24T23:29:00.000Z",
"updated_at": "2025-11-24T23:29:00.000Z",
"title": "Re: Can we make the logo pop?",
"inherits_status": true,
"type": "Inbox::Reply",
"url": "https://3.basecampapi.com/195539477/buckets/2085958502/inbox_replies/1069479086.json",
"app_url": "https://3.basecamp.com/195539477/buckets/2085958502/inbox_forwards/1069479085#__recording_1069479086",
"bookmark_url": "https://3.basecampapi.com/195539477/my/bookmarks/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiLmdpZDovL2JjMy9SZWNvcmRpbmcvMTA2OTQ3OTA4Nj9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg1yZWFkYWJsZQY7AFQ=--549cad1a70fa7d9365abbbd3b7e1bf5100c2b0fe.json",
"boosts_count": 0,
"boosts_url": "https://3.basecampapi.com/195539477/buckets/2085958502/recordings/1069479086/boosts.json",
"parent": {
"id": 1069479085,
"title": "Can we make the logo pop?",
"type": "Inbox::Forward",
"url": "https://3.basecampapi.com/195539477/buckets/2085958502/inbox_forwards/1069479085.json",
"app_url": "https://3.basecamp.com/195539477/buckets/2085958502/inbox_forwards/1069479085"
},
"bucket": {
"id": 2085958502,
"name": "Honcho Design Newsroom",
"type": "Project"
},
"creator": {
"id": 1049715913,
"attachable_sgid": "BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiK2dpZDovL2JjMy9QZXJzb24vMTA0OTcxNTkxMz9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg9hdHRhY2hhYmxlBjsAVA==--e627c45e6b34e08862da23906862412620e4d5d9",
"name": "Victor Cooper",
"email_address": "victor@honchodesign.com",
"personable_type": "User",
"title": "Chief Strategist",
"bio": "Don’t let your dreams be dreams",
"location": "Chicago, IL",
"created_at": "2026-02-12T06:08:49.342Z",
"updated_at": "2026-02-12T06:08:50.871Z",
"admin": true,
"owner": true,
"client": false,
"employee": true,
"time_zone": "America/Chicago",
"avatar_url": "https://3.basecampapi.com/195539477/people/BAhpBMlkkT4=--5fe7b70fbee7a7f0e2e1e19df7579e5d880c753d/avatar?v=1",
"company": {
"id": 1033447817,
"name": "Honcho Design"
},
"can_ping": true,
"can_manage_projects": true,
"can_manage_people": true,
"can_access_timesheet": false,
"can_access_hill_charts": true
},
"content": "Hey Henry!<br><br>Thanks for the quick feedback re: the logo. I know what you mean about feeling \"flat,\" but I'm not quite sure a rainbow is the way to go. I'll ping the design team and see what they can come up with later today. We'll post designs here in Basecamp when they're ready!<br><br><br>--VC"
}
]curl -s -H "Authorization: Bearer $ACCESS_TOKEN" https://3.basecampapi.com/$ACCOUNT_ID/inbox_forwards/2/replies.jsonGET /inbox_forwards/2/replies/3.jsonwill return the inbox reply with an ID of3for the forward with an ID of2.
{
"id": 1069479089,
"status": "active",
"visible_to_clients": false,
"created_at": "2025-11-25T00:36:00.000Z",
"updated_at": "2025-11-25T00:36:00.000Z",
"title": "Re: Can we make the logo pop?",
"inherits_status": true,
"type": "Inbox::Reply",
"url": "https://3.basecampapi.com/195539477/buckets/2085958502/inbox_replies/1069479089.json",
"app_url": "https://3.basecamp.com/195539477/buckets/2085958502/inbox_forwards/1069479085#__recording_1069479089",
"bookmark_url": "https://3.basecampapi.com/195539477/my/bookmarks/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiLmdpZDovL2JjMy9SZWNvcmRpbmcvMTA2OTQ3OTA4OT9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg1yZWFkYWJsZQY7AFQ=--980876c579f6871de55c47d306bb5507f01e537d.json",
"boosts_count": 0,
"boosts_url": "https://3.basecampapi.com/195539477/buckets/2085958502/recordings/1069479089/boosts.json",
"parent": {
"id": 1069479085,
"title": "Can we make the logo pop?",
"type": "Inbox::Forward",
"url": "https://3.basecampapi.com/195539477/buckets/2085958502/inbox_forwards/1069479085.json",
"app_url": "https://3.basecamp.com/195539477/buckets/2085958502/inbox_forwards/1069479085"
},
"bucket": {
"id": 2085958502,
"name": "Honcho Design Newsroom",
"type": "Project"
},
"creator": {
"id": 1049715934,
"attachable_sgid": "BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiK2dpZDovL2JjMy9QZXJzb24vMTA0OTcxNTkzND9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg9hdHRhY2hhYmxlBjsAVA==--7d5db20d1c81088ab8e6377a3d5a9ce48a0e0966",
"name": "henry@letobrand.com",
"email_address": "henry@letobrand.com",
"personable_type": "Outsider",
"title": null,
"bio": null,
"location": null,
"created_at": "2026-02-12T06:08:57.310Z",
"updated_at": "2026-02-12T06:08:57.310Z",
"admin": false,
"owner": false,
"client": false,
"employee": false,
"time_zone": "Etc/UTC",
"avatar_url": "https://3.basecampapi.com/195539477/people/BAhpBN5kkT4=--f1717e24836df2add6c33af21bd7b02493a0b95c/avatar?v=1",
"can_ping": true,
"can_manage_projects": false,
"can_manage_people": false,
"can_access_timesheet": false,
"can_access_hill_charts": false
},
"content": "Awesome, sounds good Victor!<br><br>Thanks again,<br>Henry"
}curl -s -H "Authorization: Bearer $ACCESS_TOKEN" https://3.basecampapi.com/$ACCOUNT_ID/inbox_forwards/2/replies/3.jsonThe following project-scoped routes are still supported and will remain available, but flat routes above are the canonical form for new integrations.
GET /buckets/1/inbox_forwards/2/replies.json→ Get inbox repliesGET /buckets/1/inbox_forwards/2/replies/3.json→ Get an inbox reply