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messages.md

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Messages

Endpoints:

Get messages

  • GET /message_boards/3/messages.json will return a paginated list of active messages in the message board with ID of 3.

To get the message board ID for a project, see the Get message board endpoint.

Optional query parameters:

  • sort - Options: created_at or updated_at. Default: created_at.
  • direction - Options: desc or asc. Default: desc.
Example JSON Response
[
  {
    "id": 1069479583,
    "status": "active",
    "visible_to_clients": false,
    "created_at": "2026-01-29T23:40:00.000Z",
    "updated_at": "2026-02-12T06:13:58.024Z",
    "title": "Laptop high res glamour shots",
    "inherits_status": true,
    "type": "Message",
    "url": "https://3.basecampapi.com/195539477/buckets/2085958504/messages/1069479583.json",
    "app_url": "https://3.basecamp.com/195539477/buckets/2085958504/messages/1069479583",
    "bookmark_url": "https://3.basecampapi.com/195539477/my/bookmarks/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiLmdpZDovL2JjMy9SZWNvcmRpbmcvMTA2OTQ3OTU4Mz9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg1yZWFkYWJsZQY7AFQ=--ac8884ce8febf69d7dedba2bdbd479cec94880e7.json",
    "subscription_url": "https://3.basecampapi.com/195539477/buckets/2085958504/recordings/1069479583/subscription.json",
    "comments_count": 1,
    "comments_url": "https://3.basecampapi.com/195539477/buckets/2085958504/recordings/1069479583/comments.json",
    "boosts_count": 0,
    "boosts_url": "https://3.basecampapi.com/195539477/buckets/2085958504/recordings/1069479583/boosts.json",
    "parent": {
      "id": 1069479392,
      "title": "Message Board",
      "type": "Message::Board",
      "url": "https://3.basecampapi.com/195539477/buckets/2085958504/message_boards/1069479392.json",
      "app_url": "https://3.basecamp.com/195539477/buckets/2085958504/message_boards/1069479392"
    },
    "bucket": {
      "id": 2085958504,
      "name": "The Leto Laptop",
      "type": "Project"
    },
    "creator": {
      "id": 1049715929,
      "attachable_sgid": "BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiK2dpZDovL2JjMy9QZXJzb24vMTA0OTcxNTkyOT9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg9hdHRhY2hhYmxlBjsAVA==--d79103e78a10cd9f8ecda7470ea315674ac8a79a",
      "name": "Matt Donahue",
      "email_address": "matt@honchodesign.com",
      "personable_type": "User",
      "title": "Global Data Strategist",
      "bio": null,
      "location": null,
      "created_at": "2026-02-12T06:08:55.898Z",
      "updated_at": "2026-02-12T06:08:55.898Z",
      "admin": false,
      "owner": false,
      "client": false,
      "employee": false,
      "time_zone": "America/Chicago",
      "avatar_url": "https://3.basecampapi.com/195539477/people/BAhpBNlkkT4=--0f3c77d8c13069d514fd3f0ad694a67e426bad0f/avatar",
      "can_ping": true,
      "can_manage_projects": true,
      "can_manage_people": true,
      "can_access_timesheet": true,
      "can_access_hill_charts": true
    },
    "content": "Hey all, here are some high res shots of the laptop hardware that we can use. These are not public yet, so be careful with how you share them. We don't want any leaks at all with these images.<br><br><bc-attachment sgid=\"BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiL2dpZDovL2JjMy9BdHRhY2htZW50LzEwNDY2Mjg0NzU_ZXhwaXJlc19pbgY7AFRJIghwdXIGOwBUSSIPYXR0YWNoYWJsZQY7AFQ=--60072a7f701afce5c5415c2f5b648edcde05e9f1\" content-type=\"image/avif\" url=\"https://3.basecampapi.com/195539477/blobs/0ae9316cbe07d868b432183532369e2755e3ac81/previews/full\" href=\"https://3.basecamp-static.com/195539477/blobs/0ae9316cbe07d868b432183532369e2755e3ac81/download/laptop_1\" filename=\"laptop_1\" filesize=\"14531\" width=\"630\" height=\"420\" previewable=\"true\" presentation=\"\"><figure>\n    <img srcset=\"https://3.basecampapi.com/195539477/blobs/0ae9316cbe07d868b432183532369e2755e3ac81/previews/full?dppx=2 2x, https://3.basecampapi.com/195539477/blobs/0ae9316cbe07d868b432183532369e2755e3ac81/previews/full?dppx=1 1x, https://3.basecampapi.com/195539477/blobs/0ae9316cbe07d868b432183532369e2755e3ac81/previews/full?dppx=3 3x, https://3.basecampapi.com/195539477/blobs/0ae9316cbe07d868b432183532369e2755e3ac81/previews/full?dppx=4 4x\" src=\"https://3.basecampapi.com/195539477/blobs/0ae9316cbe07d868b432183532369e2755e3ac81/previews/full\">\n  <figcaption>\n    laptop_1\n  </figcaption>\n</figure></bc-attachment> <bc-attachment sgid=\"BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiL2dpZDovL2JjMy9BdHRhY2htZW50LzEwNDY2Mjg0NzY_ZXhwaXJlc19pbgY7AFRJIghwdXIGOwBUSSIPYXR0YWNoYWJsZQY7AFQ=--78d6aeab5f5505ed418ed5425ba9a2d6c88969dd\" content-type=\"image/avif\" url=\"https://3.basecampapi.com/195539477/blobs/93e022f389729919b1005100ce2e4c16e14cb716/previews/full\" href=\"https://3.basecamp-static.com/195539477/blobs/93e022f389729919b1005100ce2e4c16e14cb716/download/laptop_2\" filename=\"laptop_2\" filesize=\"18545\" width=\"600\" height=\"337\" previewable=\"true\" presentation=\"\"><figure>\n    <img srcset=\"https://3.basecampapi.com/195539477/blobs/93e022f389729919b1005100ce2e4c16e14cb716/previews/full?dppx=2 2x, https://3.basecampapi.com/195539477/blobs/93e022f389729919b1005100ce2e4c16e14cb716/previews/full?dppx=1 1x, https://3.basecampapi.com/195539477/blobs/93e022f389729919b1005100ce2e4c16e14cb716/previews/full?dppx=3 3x, https://3.basecampapi.com/195539477/blobs/93e022f389729919b1005100ce2e4c16e14cb716/previews/full?dppx=4 4x\" src=\"https://3.basecampapi.com/195539477/blobs/93e022f389729919b1005100ce2e4c16e14cb716/previews/full\">\n  <figcaption>\n    laptop_2\n  </figcaption>\n</figure></bc-attachment> <bc-attachment sgid=\"BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiL2dpZDovL2JjMy9BdHRhY2htZW50LzEwNDY2Mjg0Nzc_ZXhwaXJlc19pbgY7AFRJIghwdXIGOwBUSSIPYXR0YWNoYWJsZQY7AFQ=--6c08dffec34a6454ab069505cbe40744b95af86c\" content-type=\"image/avif\" url=\"https://3.basecampapi.com/195539477/blobs/dd6d9c4f1a64d4bd271f2226818524912826fa10/previews/full\" href=\"https://3.basecamp-static.com/195539477/blobs/dd6d9c4f1a64d4bd271f2226818524912826fa10/download/laptop_3\" filename=\"laptop_3\" filesize=\"11942\" width=\"610\" height=\"435\" previewable=\"true\" presentation=\"\"><figure>\n    <img srcset=\"https://3.basecampapi.com/195539477/blobs/dd6d9c4f1a64d4bd271f2226818524912826fa10/previews/full?dppx=2 2x, https://3.basecampapi.com/195539477/blobs/dd6d9c4f1a64d4bd271f2226818524912826fa10/previews/full?dppx=1 1x, https://3.basecampapi.com/195539477/blobs/dd6d9c4f1a64d4bd271f2226818524912826fa10/previews/full?dppx=3 3x, https://3.basecampapi.com/195539477/blobs/dd6d9c4f1a64d4bd271f2226818524912826fa10/previews/full?dppx=4 4x\" src=\"https://3.basecampapi.com/195539477/blobs/dd6d9c4f1a64d4bd271f2226818524912826fa10/previews/full\">\n  <figcaption>\n    laptop_3\n  </figcaption>\n</figure></bc-attachment> <bc-attachment sgid=\"BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiL2dpZDovL2JjMy9BdHRhY2htZW50LzEwNDY2Mjg0Nzg_ZXhwaXJlc19pbgY7AFRJIghwdXIGOwBUSSIPYXR0YWNoYWJsZQY7AFQ=--5ea06fe17cff52380f599939ee90060e2c1ad274\" content-type=\"image/avif\" url=\"https://3.basecampapi.com/195539477/blobs/d0f88e11de567adb30025fe73ce8a843f20701f5/previews/full\" href=\"https://3.basecamp-static.com/195539477/blobs/d0f88e11de567adb30025fe73ce8a843f20701f5/download/laptop_4\" filename=\"laptop_4\" filesize=\"10894\" width=\"700\" height=\"355\" previewable=\"true\" presentation=\"\"><figure>\n    <img srcset=\"https://3.basecampapi.com/195539477/blobs/d0f88e11de567adb30025fe73ce8a843f20701f5/previews/full?dppx=2 2x, https://3.basecampapi.com/195539477/blobs/d0f88e11de567adb30025fe73ce8a843f20701f5/previews/full?dppx=1 1x, https://3.basecampapi.com/195539477/blobs/d0f88e11de567adb30025fe73ce8a843f20701f5/previews/full?dppx=3 3x, https://3.basecampapi.com/195539477/blobs/d0f88e11de567adb30025fe73ce8a843f20701f5/previews/full?dppx=4 4x\" src=\"https://3.basecampapi.com/195539477/blobs/d0f88e11de567adb30025fe73ce8a843f20701f5/previews/full\">\n  <figcaption>\n    laptop_4\n  </figcaption>\n</figure></bc-attachment> <bc-attachment sgid=\"BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiL2dpZDovL2JjMy9BdHRhY2htZW50LzEwNDY2Mjg0Nzk_ZXhwaXJlc19pbgY7AFRJIghwdXIGOwBUSSIPYXR0YWNoYWJsZQY7AFQ=--38376bcaa1e52f3e344580ddaa112beba391b42a\" content-type=\"image/avif\" url=\"https://3.basecampapi.com/195539477/blobs/63f9ba498734debbf871821f3428b8db80eab679/previews/full\" href=\"https://3.basecamp-static.com/195539477/blobs/63f9ba498734debbf871821f3428b8db80eab679/download/laptop_5\" filename=\"laptop_5\" filesize=\"14497\" width=\"640\" height=\"427\" previewable=\"true\" presentation=\"\"><figure>\n    <img srcset=\"https://3.basecampapi.com/195539477/blobs/63f9ba498734debbf871821f3428b8db80eab679/previews/full?dppx=2 2x, https://3.basecampapi.com/195539477/blobs/63f9ba498734debbf871821f3428b8db80eab679/previews/full?dppx=1 1x, https://3.basecampapi.com/195539477/blobs/63f9ba498734debbf871821f3428b8db80eab679/previews/full?dppx=3 3x, https://3.basecampapi.com/195539477/blobs/63f9ba498734debbf871821f3428b8db80eab679/previews/full?dppx=4 4x\" src=\"https://3.basecampapi.com/195539477/blobs/63f9ba498734debbf871821f3428b8db80eab679/previews/full\">\n  <figcaption>\n    laptop_5\n  </figcaption>\n</figure></bc-attachment> <bc-attachment sgid=\"BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiL2dpZDovL2JjMy9BdHRhY2htZW50LzEwNDY2Mjg0ODA_ZXhwaXJlc19pbgY7AFRJIghwdXIGOwBUSSIPYXR0YWNoYWJsZQY7AFQ=--db6d30f319fedea2072df5a9e533ae9b83372504\" content-type=\"image/avif\" url=\"https://3.basecampapi.com/195539477/blobs/a3c1c6579da4d76fba67422e4250a80f6c642fd6/previews/full\" href=\"https://3.basecamp-static.com/195539477/blobs/a3c1c6579da4d76fba67422e4250a80f6c642fd6/download/laptop_6\" filename=\"laptop_6\" filesize=\"9370\" width=\"520\" height=\"365\" previewable=\"true\" presentation=\"\"><figure>\n    <img srcset=\"https://3.basecampapi.com/195539477/blobs/a3c1c6579da4d76fba67422e4250a80f6c642fd6/previews/full?dppx=2 2x, https://3.basecampapi.com/195539477/blobs/a3c1c6579da4d76fba67422e4250a80f6c642fd6/previews/full?dppx=1 1x, https://3.basecampapi.com/195539477/blobs/a3c1c6579da4d76fba67422e4250a80f6c642fd6/previews/full?dppx=3 3x, https://3.basecampapi.com/195539477/blobs/a3c1c6579da4d76fba67422e4250a80f6c642fd6/previews/full?dppx=4 4x\" src=\"https://3.basecampapi.com/195539477/blobs/a3c1c6579da4d76fba67422e4250a80f6c642fd6/previews/full\">\n  <figcaption>\n    laptop_6\n  </figcaption>\n</figure></bc-attachment> <bc-attachment sgid=\"BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiL2dpZDovL2JjMy9BdHRhY2htZW50LzEwNDY2Mjg0ODE_ZXhwaXJlc19pbgY7AFRJIghwdXIGOwBUSSIPYXR0YWNoYWJsZQY7AFQ=--d2c070cd0872b6049fb79df6cd9ada7464e1757e\" content-type=\"image/avif\" url=\"https://3.basecampapi.com/195539477/blobs/2a4aec95086d843056c9b22d13276324d2112643/previews/full\" href=\"https://3.basecamp-static.com/195539477/blobs/2a4aec95086d843056c9b22d13276324d2112643/download/laptop_7\" filename=\"laptop_7\" filesize=\"48646\" width=\"700\" height=\"462\" previewable=\"true\" presentation=\"\"><figure>\n    <img srcset=\"https://3.basecampapi.com/195539477/blobs/2a4aec95086d843056c9b22d13276324d2112643/previews/full?dppx=2 2x, https://3.basecampapi.com/195539477/blobs/2a4aec95086d843056c9b22d13276324d2112643/previews/full?dppx=1 1x, https://3.basecampapi.com/195539477/blobs/2a4aec95086d843056c9b22d13276324d2112643/previews/full?dppx=3 3x, https://3.basecampapi.com/195539477/blobs/2a4aec95086d843056c9b22d13276324d2112643/previews/full?dppx=4 4x\" src=\"https://3.basecampapi.com/195539477/blobs/2a4aec95086d843056c9b22d13276324d2112643/previews/full\">\n  <figcaption>\n    laptop_7\n  </figcaption>\n</figure></bc-attachment> <bc-attachment sgid=\"BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiL2dpZDovL2JjMy9BdHRhY2htZW50LzEwNDY2Mjg0ODI_ZXhwaXJlc19pbgY7AFRJIghwdXIGOwBUSSIPYXR0YWNoYWJsZQY7AFQ=--98023c4f0b4cdf0ff6ef6395ea0163aa774a3444\" content-type=\"image/avif\" url=\"https://3.basecampapi.com/195539477/blobs/f395a0ad0d5c88c1c5cc79dafba85664dce4a610/previews/full\" href=\"https://3.basecamp-static.com/195539477/blobs/f395a0ad0d5c88c1c5cc79dafba85664dce4a610/download/laptop_8\" filename=\"laptop_8\" filesize=\"12904\" width=\"540\" height=\"334\" previewable=\"true\" presentation=\"\"><figure>\n    <img srcset=\"https://3.basecampapi.com/195539477/blobs/f395a0ad0d5c88c1c5cc79dafba85664dce4a610/previews/full?dppx=2 2x, https://3.basecampapi.com/195539477/blobs/f395a0ad0d5c88c1c5cc79dafba85664dce4a610/previews/full?dppx=1 1x, https://3.basecampapi.com/195539477/blobs/f395a0ad0d5c88c1c5cc79dafba85664dce4a610/previews/full?dppx=3 3x, https://3.basecampapi.com/195539477/blobs/f395a0ad0d5c88c1c5cc79dafba85664dce4a610/previews/full?dppx=4 4x\" src=\"https://3.basecampapi.com/195539477/blobs/f395a0ad0d5c88c1c5cc79dafba85664dce4a610/previews/full\">\n  <figcaption>\n    laptop_8\n  </figcaption>\n</figure></bc-attachment> <bc-attachment sgid=\"BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiL2dpZDovL2JjMy9BdHRhY2htZW50LzEwNDY2Mjg0ODM_ZXhwaXJlc19pbgY7AFRJIghwdXIGOwBUSSIPYXR0YWNoYWJsZQY7AFQ=--fbc4cc6ef8b067a79efaaf026444744a0a4b4393\" content-type=\"image/avif\" url=\"https://3.basecampapi.com/195539477/blobs/48263841ac03d289374956dcd7a7fbaf4dc44249/previews/full\" href=\"https://3.basecamp-static.com/195539477/blobs/48263841ac03d289374956dcd7a7fbaf4dc44249/download/laptop_9\" filename=\"laptop_9\" filesize=\"30919\" width=\"700\" height=\"394\" previewable=\"true\" presentation=\"\"><figure>\n    <img srcset=\"https://3.basecampapi.com/195539477/blobs/48263841ac03d289374956dcd7a7fbaf4dc44249/previews/full?dppx=2 2x, https://3.basecampapi.com/195539477/blobs/48263841ac03d289374956dcd7a7fbaf4dc44249/previews/full?dppx=1 1x, https://3.basecampapi.com/195539477/blobs/48263841ac03d289374956dcd7a7fbaf4dc44249/previews/full?dppx=3 3x, https://3.basecampapi.com/195539477/blobs/48263841ac03d289374956dcd7a7fbaf4dc44249/previews/full?dppx=4 4x\" src=\"https://3.basecampapi.com/195539477/blobs/48263841ac03d289374956dcd7a7fbaf4dc44249/previews/full\">\n  <figcaption>\n    laptop_9\n  </figcaption>\n</figure></bc-attachment> <bc-attachment sgid=\"BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiL2dpZDovL2JjMy9BdHRhY2htZW50LzEwNDY2Mjg0ODQ_ZXhwaXJlc19pbgY7AFRJIghwdXIGOwBUSSIPYXR0YWNoYWJsZQY7AFQ=--c6b88bec2c004b4dfafbdc8a30b181d31da08db6\" content-type=\"image/avif\" url=\"https://3.basecampapi.com/195539477/blobs/755a16a6c833be340d0df99ba22faadea83e2d0b/previews/full\" href=\"https://3.basecamp-static.com/195539477/blobs/755a16a6c833be340d0df99ba22faadea83e2d0b/download/laptop_10\" filename=\"laptop_10\" filesize=\"7014\" width=\"620\" height=\"413\" previewable=\"true\" presentation=\"\"><figure>\n    <img srcset=\"https://3.basecampapi.com/195539477/blobs/755a16a6c833be340d0df99ba22faadea83e2d0b/previews/full?dppx=2 2x, https://3.basecampapi.com/195539477/blobs/755a16a6c833be340d0df99ba22faadea83e2d0b/previews/full?dppx=1 1x, https://3.basecampapi.com/195539477/blobs/755a16a6c833be340d0df99ba22faadea83e2d0b/previews/full?dppx=3 3x, https://3.basecampapi.com/195539477/blobs/755a16a6c833be340d0df99ba22faadea83e2d0b/previews/full?dppx=4 4x\" src=\"https://3.basecampapi.com/195539477/blobs/755a16a6c833be340d0df99ba22faadea83e2d0b/previews/full\">\n  <figcaption>\n    laptop_10\n  </figcaption>\n</figure></bc-attachment> <bc-attachment sgid=\"BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiL2dpZDovL2JjMy9BdHRhY2htZW50LzEwNDY2Mjg0ODU_ZXhwaXJlc19pbgY7AFRJIghwdXIGOwBUSSIPYXR0YWNoYWJsZQY7AFQ=--419dc4a33710d0001fac8cf007bcf22bd187719b\" content-type=\"image/avif\" url=\"https://3.basecampapi.com/195539477/blobs/d08e21d95f6e54fe05ad60bd851e946c1d8e5d08/previews/full\" href=\"https://3.basecamp-static.com/195539477/blobs/d08e21d95f6e54fe05ad60bd851e946c1d8e5d08/download/laptop_11\" filename=\"laptop_11\" filesize=\"2693\" width=\"620\" height=\"413\" previewable=\"true\" presentation=\"\"><figure>\n    <img srcset=\"https://3.basecampapi.com/195539477/blobs/d08e21d95f6e54fe05ad60bd851e946c1d8e5d08/previews/full?dppx=2 2x, https://3.basecampapi.com/195539477/blobs/d08e21d95f6e54fe05ad60bd851e946c1d8e5d08/previews/full?dppx=1 1x, https://3.basecampapi.com/195539477/blobs/d08e21d95f6e54fe05ad60bd851e946c1d8e5d08/previews/full?dppx=3 3x, https://3.basecampapi.com/195539477/blobs/d08e21d95f6e54fe05ad60bd851e946c1d8e5d08/previews/full?dppx=4 4x\" src=\"https://3.basecampapi.com/195539477/blobs/d08e21d95f6e54fe05ad60bd851e946c1d8e5d08/previews/full\">\n  <figcaption>\n    laptop_11\n  </figcaption>\n</figure></bc-attachment> <bc-attachment sgid=\"BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiL2dpZDovL2JjMy9BdHRhY2htZW50LzEwNDY2Mjg0ODY_ZXhwaXJlc19pbgY7AFRJIghwdXIGOwBUSSIPYXR0YWNoYWJsZQY7AFQ=--58c62d34383210581f1fc79361a50307607df6f7\" content-type=\"image/avif\" url=\"https://3.basecampapi.com/195539477/blobs/0148d5c6d5e82466d9c107447e50a69e51977d15/previews/full\" href=\"https://3.basecamp-static.com/195539477/blobs/0148d5c6d5e82466d9c107447e50a69e51977d15/download/laptop_12\" filename=\"laptop_12\" filesize=\"23152\" width=\"700\" height=\"387\" previewable=\"true\" presentation=\"\"><figure>\n    <img srcset=\"https://3.basecampapi.com/195539477/blobs/0148d5c6d5e82466d9c107447e50a69e51977d15/previews/full?dppx=2 2x, https://3.basecampapi.com/195539477/blobs/0148d5c6d5e82466d9c107447e50a69e51977d15/previews/full?dppx=1 1x, https://3.basecampapi.com/195539477/blobs/0148d5c6d5e82466d9c107447e50a69e51977d15/previews/full?dppx=3 3x, https://3.basecampapi.com/195539477/blobs/0148d5c6d5e82466d9c107447e50a69e51977d15/previews/full?dppx=4 4x\" src=\"https://3.basecampapi.com/195539477/blobs/0148d5c6d5e82466d9c107447e50a69e51977d15/previews/full\">\n  <figcaption>\n    laptop_12\n  </figcaption>\n</figure></bc-attachment> <bc-attachment sgid=\"BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiL2dpZDovL2JjMy9BdHRhY2htZW50LzEwNDY2Mjg0ODc_ZXhwaXJlc19pbgY7AFRJIghwdXIGOwBUSSIPYXR0YWNoYWJsZQY7AFQ=--0feed7e80ebc54613d3b860ddec93492919ff470\" content-type=\"image/avif\" url=\"https://3.basecampapi.com/195539477/blobs/38298889a054d15ed2a93f642d9158273a21a909/previews/full\" href=\"https://3.basecamp-static.com/195539477/blobs/38298889a054d15ed2a93f642d9158273a21a909/download/laptop_13\" filename=\"laptop_13\" filesize=\"27751\" width=\"700\" height=\"466\" previewable=\"true\" presentation=\"\"><figure>\n    <img srcset=\"https://3.basecampapi.com/195539477/blobs/38298889a054d15ed2a93f642d9158273a21a909/previews/full?dppx=2 2x, https://3.basecampapi.com/195539477/blobs/38298889a054d15ed2a93f642d9158273a21a909/previews/full?dppx=1 1x, https://3.basecampapi.com/195539477/blobs/38298889a054d15ed2a93f642d9158273a21a909/previews/full?dppx=3 3x, https://3.basecampapi.com/195539477/blobs/38298889a054d15ed2a93f642d9158273a21a909/previews/full?dppx=4 4x\" src=\"https://3.basecampapi.com/195539477/blobs/38298889a054d15ed2a93f642d9158273a21a909/previews/full\">\n  <figcaption>\n    laptop_13\n  </figcaption>\n</figure></bc-attachment> <bc-attachment sgid=\"BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiL2dpZDovL2JjMy9BdHRhY2htZW50LzEwNDY2Mjg0ODg_ZXhwaXJlc19pbgY7AFRJIghwdXIGOwBUSSIPYXR0YWNoYWJsZQY7AFQ=--7310094b0e002f2e888252d45ca93a224af64cd1\" content-type=\"image/avif\" url=\"https://3.basecampapi.com/195539477/blobs/0b8b79bf367108ad18639f4b27a39d58ac8a6ed1/previews/full\" href=\"https://3.basecamp-static.com/195539477/blobs/0b8b79bf367108ad18639f4b27a39d58ac8a6ed1/download/laptop_14\" filename=\"laptop_14\" filesize=\"15988\" width=\"700\" height=\"466\" previewable=\"true\" presentation=\"\"><figure>\n    <img srcset=\"https://3.basecampapi.com/195539477/blobs/0b8b79bf367108ad18639f4b27a39d58ac8a6ed1/previews/full?dppx=2 2x, https://3.basecampapi.com/195539477/blobs/0b8b79bf367108ad18639f4b27a39d58ac8a6ed1/previews/full?dppx=1 1x, https://3.basecampapi.com/195539477/blobs/0b8b79bf367108ad18639f4b27a39d58ac8a6ed1/previews/full?dppx=3 3x, https://3.basecampapi.com/195539477/blobs/0b8b79bf367108ad18639f4b27a39d58ac8a6ed1/previews/full?dppx=4 4x\" src=\"https://3.basecampapi.com/195539477/blobs/0b8b79bf367108ad18639f4b27a39d58ac8a6ed1/previews/full\">\n  <figcaption>\n    laptop_14\n  </figcaption>\n</figure></bc-attachment>",
    "subject": "Laptop high res glamour shots"
  }
]
Copy as cURL
curl -s -H "Authorization: Bearer $ACCESS_TOKEN" https://3.basecampapi.com/$ACCOUNT_ID/message_boards/3/messages.json

Get a message

  • GET /messages/2.json will return the message with an ID of 2.
Example JSON Response
{
  "id": 1069479406,
  "status": "active",
  "visible_to_clients": false,
  "created_at": "2025-12-30T18:58:00.000Z",
  "updated_at": "2026-02-26T16:41:51.038Z",
  "title": "We won Leto!",
  "inherits_status": true,
  "type": "Message",
  "url": "https://3.basecampapi.com/195539477/buckets/2085958504/messages/1069479406.json",
  "app_url": "https://3.basecamp.com/195539477/buckets/2085958504/messages/1069479406",
  "bookmark_url": "https://3.basecamp.com/195539477/my/bookmarks/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiLmdpZDovL2JjMy9SZWNvcmRpbmcvMTA2OTQ3OTQwNj9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg1yZWFkYWJsZQY7AFQ=--309e0fbab86893aaaf279f01f2a0795c56716aeb",
  "subscription_url": "https://3.basecamp.com/195539477/buckets/2085958504/recordings/1069479406/subscription",
  "comments_count": 10,
  "comments_url": "https://3.basecampapi.com/195539477/buckets/2085958504/recordings/1069479406/comments.json",
  "boosts_count": 5,
  "boosts_url": "https://3.basecampapi.com/195539477/buckets/2085958504/recordings/1069479406/boosts.json",
  "parent": {
    "id": 1069479392,
    "title": "Message Board",
    "type": "Message::Board",
    "url": "https://3.basecampapi.com/195539477/buckets/2085958504/message_boards/1069479392.json",
    "app_url": "https://3.basecamp.com/195539477/buckets/2085958504/message_boards/1069479392"
  },
  "bucket": {
    "id": 2085958504,
    "name": "The Leto Laptop",
    "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",
    "company": {
      "id": 1033447817,
      "name": "Honcho Design"
    },
    "can_ping": true,
    "can_manage_projects": true,
    "can_manage_people": true,
    "can_access_timesheet": true,
    "can_access_hill_charts": true
  },
  "content": "Hey guys,<br><br>We won the Leto account! This is huge for us, it really marks a turning point for the company.<br><br>As you know we've been pursuing bigger clients in the consumer space, but we've done so carefully. We've never been about getting the biggest clients - those are easy to get. We've been trying to get the best clients for us - ones that will challenge us, grow us, make us better, and ultimately giving us a platform to show how awesome you guys all are. And now we have that!<br><br>A big congrats to everyone who worked so hard to make this happen, and now the fun really begins. Most of the pitch team will stay on as leading members of the first project, the Leto Microsite.<br><br>Again, great job everyone, and let's go kick some more butt!<br><br>-Victor",
  "subject": "We won Leto!"
}
Copy as cURL
curl -s -H "Authorization: Bearer $ACCESS_TOKEN" https://3.basecampapi.com/$ACCOUNT_ID/messages/2.json

Create a message

  • POST /message_boards/3/messages.json publishes a message under the message board with an ID of 3.

Required parameters: subject as the title of the message, and status, set to active to publish immediately.

Optional parameters:

  • content as the body of the message. See our Rich text guide for what HTML tags are allowed.
  • category_id to set a type for the message. To get a list of all the message types for a project, see the Get message types endpoint.
  • subscriptions an array of people IDs to be notified of the new message when it's posted and subscribed to it. If not present, all people on the project will be notified and subscribed.

This endpoint will return 201 Created with the current JSON representation of the message if the creation was a success. See the Get a message endpoint for more info on the payload.

Example JSON Request
{
  "subject": "Kickoff",
  "content": "<div><strong>Welcome to Basecamp, everyone.</strong></div>",
  "status": "active"
}
Copy as cURL
curl -s -H "Authorization: Bearer $ACCESS_TOKEN" -H "Content-Type: application/json" \
  -d '{"subject":"Kickoff","content":"<div><strong>Welcome to Basecamp, everyone.</strong></div>","status":"active"}' \
  https://3.basecampapi.com/$ACCOUNT_ID/message_boards/3/messages.json

Update a message

  • PUT /messages/2.json allows changing the subject, content and category_id of the message with an ID of 2.

This endpoint will return 200 OK with the current JSON representation of the message if the update was a success. See the Get a message endpoint for more info on the payload.

Example JSON Request
{
  "subject": "Spin-down",
  "content": "<div><strong>Oops, we lost that client.</strong></div>"
}
Copy as cURL
curl -s -H "Authorization: Bearer $ACCESS_TOKEN" -H "Content-Type: application/json" \
  -d '{"subject":"Spin-down","content":"<div><strong>Oops, we lost that client.</strong></div>"}' -X PUT \
  https://3.basecampapi.com/$ACCOUNT_ID/messages/2.json

Pin a message

  • POST /recordings/2/pin.json pins the message with ID 2.
  • DELETE /recordings/2/pin.json unpins the message with ID 2.

This endpoint will return 204 No Content if the operation was a success.

Copy as cURL
curl -s -H "Authorization: Bearer $ACCESS_TOKEN" -H "Content-Type: application/json" \
  -X POST \
  https://3.basecampapi.com/$ACCOUNT_ID/recordings/2/pin.json
curl -s -H "Authorization: Bearer $ACCESS_TOKEN" -H "Content-Type: application/json" \
  -X DELETE \
  https://3.basecampapi.com/$ACCOUNT_ID/recordings/2/pin.json

Legacy project-scoped routes

The following project-scoped routes are still supported and will remain available, but flat routes above are the canonical form for new integrations.