Cowork tasks
Say which day the company's work is due
Requires a user session with multiplayer_tasks.update or the existing application_themes.update permission. The version the client observed is compared with the stored one, so a date set against a stale view is refused and answered with the current task instead of merged. A null due_on clears the date, which is where every task starts. Work in another company, deleted work, and an unknown id all answer the same not-found; work deleted after that read and before the new date lands answers 410. A successful write announces a data-free invalidation on every theme this work’s linked discussions sit on.
PUT
/
api
/
v202604
/
multiplayer
/
tasks
/
{id}
/
due-on
Say which day the company's work is due
curl --request PUT \
--url https://api.fluid.app/api/v202604/multiplayer/tasks/{id}/due-on \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"due_change": {
"due_on": "2026-10-09",
"expected_version": 0
}
}
'import requests
url = "https://api.fluid.app/api/v202604/multiplayer/tasks/{id}/due-on"
payload = { "due_change": {
"due_on": "2026-10-09",
"expected_version": 0
} }
headers = {
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.put(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'PUT',
headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
body: JSON.stringify({due_change: {due_on: '2026-10-09', expected_version: 0}})
};
fetch('https://api.fluid.app/api/v202604/multiplayer/tasks/{id}/due-on', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.fluid.app/api/v202604/multiplayer/tasks/{id}/due-on",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "PUT",
CURLOPT_POSTFIELDS => json_encode([
'due_change' => [
'due_on' => '2026-10-09',
'expected_version' => 0
]
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://api.fluid.app/api/v202604/multiplayer/tasks/{id}/due-on"
payload := strings.NewReader("{\n \"due_change\": {\n \"due_on\": \"2026-10-09\",\n \"expected_version\": 0\n }\n}")
req, _ := http.NewRequest("PUT", url, payload)
req.Header.Add("Authorization", "Bearer <token>")
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.put("https://api.fluid.app/api/v202604/multiplayer/tasks/{id}/due-on")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"due_change\": {\n \"due_on\": \"2026-10-09\",\n \"expected_version\": 0\n }\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.fluid.app/api/v202604/multiplayer/tasks/{id}/due-on")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Put.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"due_change\": {\n \"due_on\": \"2026-10-09\",\n \"expected_version\": 0\n }\n}"
response = http.request(request)
puts response.read_body{
"task": {
"id": "9271f7b9-237c-5dbe-ab78-f866652d747a",
"agency": null,
"agency_join_request": null,
"agency_request": null,
"assignee": null,
"assigner": null,
"board_position": null,
"board_position_at_ms": null,
"category": null,
"client_id": "acme-videos",
"company_id": 96778814,
"created_at": "2026-11-12T17:50:31Z",
"creator_id": 433400890,
"description": "Use videos from the media library",
"due_on": "2026-10-09",
"kind": null,
"lock_version": 1,
"merged_from": [],
"merged_into": null,
"mist_confidence": {
"state": "not_assessed"
},
"plan": null,
"priority": null,
"run_id": null,
"run_thread_id": null,
"source_threads": [],
"status": "open",
"status_editable": true,
"tags": [],
"title": "Add customer videos",
"updated_at": "2026-11-12T17:53:43Z"
},
"status": 200,
"meta": {
"request_uuid": null,
"timestamp": "2026-11-12T17:53:43Z"
}
}{
"error": {
"message": "<string>",
"details": {}
},
"status": 123,
"meta": {
"request_uuid": "<string>",
"timestamp": "2023-11-07T05:31:56Z"
}
}{
"error": {
"message": "<string>",
"details": {
"type": "conflict",
"merged_into": {
"id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"title": "<string>"
},
"task": {
"id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"client_id": "<string>",
"company_id": 123,
"creator_id": 123,
"title": "<string>",
"description": "<string>",
"status": "open",
"priority": "urgent",
"due_on": "2023-12-25",
"kind": "bug",
"category": "design",
"plan": [
{
"title": "<string>",
"outcome": "<string>"
}
],
"board_position": "<string>",
"board_position_at_ms": 123,
"lock_version": 1,
"run_id": "<string>",
"run_thread_id": 123,
"tags": [
"<string>"
],
"agency": {
"key": "example_agency",
"name": "Example agency"
},
"assignee": {
"id": "<string>",
"name": "<string>",
"kind": "user"
},
"assigner": {
"id": "<string>",
"name": "<string>",
"kind": "user"
},
"source_threads": [
{
"id": 123,
"theme_id": 123,
"client_id": "<string>",
"n": 123,
"page_url": "<string>",
"author_name": "<string>"
}
],
"created_at": "2023-11-07T05:31:56Z",
"updated_at": "2023-11-07T05:31:56Z",
"mist_confidence": {
"state": "current",
"score": 3,
"band": "red",
"summary": "<string>",
"concerns": [
"<string>"
],
"raise_by": [
"<string>"
],
"assessed_at": "2023-11-07T05:31:56Z",
"failure": "budget",
"assessment_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"suggested_kind": "bug",
"category": "design",
"difficulty": "easy",
"hours_low": 80,
"hours_high": 80,
"questions": [
{
"id": "q1",
"prompt": "<string>",
"options": [
"<string>"
]
}
],
"duplicate_of": {
"id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"title": "<string>",
"status": "open",
"reason": "<string>",
"merge_blocked": "agency"
}
},
"source": {
"provider": "linear",
"identifier": "<string>",
"url": "<string>"
},
"attachment_count": 1,
"agency_request": {
"agency": {
"key": "example_agency",
"name": "Example agency"
},
"owner": {
"id": "<string>",
"name": "<string>"
},
"access": [
{
"person": {
"id": "<string>",
"name": "<string>"
},
"role": {
"id": 123,
"name": "<string>"
}
}
],
"owner_has_access": true,
"state": "sent",
"stage": "requested",
"version": 1,
"sent_at": "2023-11-07T05:31:56Z",
"quote": {
"hours": 123,
"deliver_on": "2023-12-25",
"note": "<string>",
"quoted_at": "2023-11-07T05:31:56Z"
},
"revised_quote": {
"hours": 123,
"deliver_on": "2023-12-25",
"note": "<string>",
"quoted_at": "2023-11-07T05:31:56Z"
},
"changes_round": 1,
"reopenable_until": "2023-11-07T05:31:56Z",
"delivery_overdue": true,
"last_step": {
"kind": "<string>",
"at": "2023-11-07T05:31:56Z",
"note": "<string>"
}
},
"agency_join_request": {
"id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"state": "pending",
"agency_name": "<string>",
"decline_reason": "<string>",
"requested_at": "2023-11-07T05:31:56Z",
"lock_version": 1
},
"merged_into": {
"id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"title": "<string>",
"deleted": true
},
"merged_from": [
{
"id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"title": "<string>",
"merged_at": "2023-11-07T05:31:56Z",
"version": 1
}
],
"conversation_id": 123,
"status_editable": true
}
}
},
"status": 123,
"meta": {
"request_uuid": "<string>",
"timestamp": "2023-11-07T05:31:56Z"
}
}{
"error": {
"message": "<string>",
"details": {}
},
"status": 123,
"meta": {
"request_uuid": "<string>",
"timestamp": "2023-11-07T05:31:56Z"
}
}{
"error": {
"message": "<string>",
"details": {}
},
"status": 123,
"meta": {
"request_uuid": "<string>",
"timestamp": "2023-11-07T05:31:56Z"
}
}Authorizations
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
Path Parameters
The task UUID returned at creation or in a task page.
Body
application/json
Show child attributes
Show child attributes
⌘I
Say which day the company's work is due
curl --request PUT \
--url https://api.fluid.app/api/v202604/multiplayer/tasks/{id}/due-on \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"due_change": {
"due_on": "2026-10-09",
"expected_version": 0
}
}
'import requests
url = "https://api.fluid.app/api/v202604/multiplayer/tasks/{id}/due-on"
payload = { "due_change": {
"due_on": "2026-10-09",
"expected_version": 0
} }
headers = {
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.put(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'PUT',
headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
body: JSON.stringify({due_change: {due_on: '2026-10-09', expected_version: 0}})
};
fetch('https://api.fluid.app/api/v202604/multiplayer/tasks/{id}/due-on', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.fluid.app/api/v202604/multiplayer/tasks/{id}/due-on",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "PUT",
CURLOPT_POSTFIELDS => json_encode([
'due_change' => [
'due_on' => '2026-10-09',
'expected_version' => 0
]
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://api.fluid.app/api/v202604/multiplayer/tasks/{id}/due-on"
payload := strings.NewReader("{\n \"due_change\": {\n \"due_on\": \"2026-10-09\",\n \"expected_version\": 0\n }\n}")
req, _ := http.NewRequest("PUT", url, payload)
req.Header.Add("Authorization", "Bearer <token>")
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.put("https://api.fluid.app/api/v202604/multiplayer/tasks/{id}/due-on")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"due_change\": {\n \"due_on\": \"2026-10-09\",\n \"expected_version\": 0\n }\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.fluid.app/api/v202604/multiplayer/tasks/{id}/due-on")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Put.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"due_change\": {\n \"due_on\": \"2026-10-09\",\n \"expected_version\": 0\n }\n}"
response = http.request(request)
puts response.read_body{
"task": {
"id": "9271f7b9-237c-5dbe-ab78-f866652d747a",
"agency": null,
"agency_join_request": null,
"agency_request": null,
"assignee": null,
"assigner": null,
"board_position": null,
"board_position_at_ms": null,
"category": null,
"client_id": "acme-videos",
"company_id": 96778814,
"created_at": "2026-11-12T17:50:31Z",
"creator_id": 433400890,
"description": "Use videos from the media library",
"due_on": "2026-10-09",
"kind": null,
"lock_version": 1,
"merged_from": [],
"merged_into": null,
"mist_confidence": {
"state": "not_assessed"
},
"plan": null,
"priority": null,
"run_id": null,
"run_thread_id": null,
"source_threads": [],
"status": "open",
"status_editable": true,
"tags": [],
"title": "Add customer videos",
"updated_at": "2026-11-12T17:53:43Z"
},
"status": 200,
"meta": {
"request_uuid": null,
"timestamp": "2026-11-12T17:53:43Z"
}
}{
"error": {
"message": "<string>",
"details": {}
},
"status": 123,
"meta": {
"request_uuid": "<string>",
"timestamp": "2023-11-07T05:31:56Z"
}
}{
"error": {
"message": "<string>",
"details": {
"type": "conflict",
"merged_into": {
"id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"title": "<string>"
},
"task": {
"id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"client_id": "<string>",
"company_id": 123,
"creator_id": 123,
"title": "<string>",
"description": "<string>",
"status": "open",
"priority": "urgent",
"due_on": "2023-12-25",
"kind": "bug",
"category": "design",
"plan": [
{
"title": "<string>",
"outcome": "<string>"
}
],
"board_position": "<string>",
"board_position_at_ms": 123,
"lock_version": 1,
"run_id": "<string>",
"run_thread_id": 123,
"tags": [
"<string>"
],
"agency": {
"key": "example_agency",
"name": "Example agency"
},
"assignee": {
"id": "<string>",
"name": "<string>",
"kind": "user"
},
"assigner": {
"id": "<string>",
"name": "<string>",
"kind": "user"
},
"source_threads": [
{
"id": 123,
"theme_id": 123,
"client_id": "<string>",
"n": 123,
"page_url": "<string>",
"author_name": "<string>"
}
],
"created_at": "2023-11-07T05:31:56Z",
"updated_at": "2023-11-07T05:31:56Z",
"mist_confidence": {
"state": "current",
"score": 3,
"band": "red",
"summary": "<string>",
"concerns": [
"<string>"
],
"raise_by": [
"<string>"
],
"assessed_at": "2023-11-07T05:31:56Z",
"failure": "budget",
"assessment_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"suggested_kind": "bug",
"category": "design",
"difficulty": "easy",
"hours_low": 80,
"hours_high": 80,
"questions": [
{
"id": "q1",
"prompt": "<string>",
"options": [
"<string>"
]
}
],
"duplicate_of": {
"id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"title": "<string>",
"status": "open",
"reason": "<string>",
"merge_blocked": "agency"
}
},
"source": {
"provider": "linear",
"identifier": "<string>",
"url": "<string>"
},
"attachment_count": 1,
"agency_request": {
"agency": {
"key": "example_agency",
"name": "Example agency"
},
"owner": {
"id": "<string>",
"name": "<string>"
},
"access": [
{
"person": {
"id": "<string>",
"name": "<string>"
},
"role": {
"id": 123,
"name": "<string>"
}
}
],
"owner_has_access": true,
"state": "sent",
"stage": "requested",
"version": 1,
"sent_at": "2023-11-07T05:31:56Z",
"quote": {
"hours": 123,
"deliver_on": "2023-12-25",
"note": "<string>",
"quoted_at": "2023-11-07T05:31:56Z"
},
"revised_quote": {
"hours": 123,
"deliver_on": "2023-12-25",
"note": "<string>",
"quoted_at": "2023-11-07T05:31:56Z"
},
"changes_round": 1,
"reopenable_until": "2023-11-07T05:31:56Z",
"delivery_overdue": true,
"last_step": {
"kind": "<string>",
"at": "2023-11-07T05:31:56Z",
"note": "<string>"
}
},
"agency_join_request": {
"id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"state": "pending",
"agency_name": "<string>",
"decline_reason": "<string>",
"requested_at": "2023-11-07T05:31:56Z",
"lock_version": 1
},
"merged_into": {
"id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"title": "<string>",
"deleted": true
},
"merged_from": [
{
"id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"title": "<string>",
"merged_at": "2023-11-07T05:31:56Z",
"version": 1
}
],
"conversation_id": 123,
"status_editable": true
}
}
},
"status": 123,
"meta": {
"request_uuid": "<string>",
"timestamp": "2023-11-07T05:31:56Z"
}
}{
"error": {
"message": "<string>",
"details": {}
},
"status": 123,
"meta": {
"request_uuid": "<string>",
"timestamp": "2023-11-07T05:31:56Z"
}
}{
"error": {
"message": "<string>",
"details": {}
},
"status": 123,
"meta": {
"request_uuid": "<string>",
"timestamp": "2023-11-07T05:31:56Z"
}
}