Create one-off task

Endpoint

POST /organizations/{org_id}/tasks

Creates a standalone one-off task that isn’t part of any process run.

Request

Replace {org_id} with your Organization ID.

Headers

• Authorization: Bearer {your_access_token}
• Accept: application/json
• X-Tallyfy-Client: APIClient
• Content-Type: application/json

Body (JSON)

Required fields

• title (string, max 600 chars): The task title.
• task_type (string): One of task, approval, expiring, email, or expiring_email.
• owners (object): Assignees - structure: { "users": [<user_ids>], "guests": ["email@example.com"], "groups": [<group_ids>] }.
• deadline (string): Due date/time in ISO 8601 format.

Optional fields

• description (string): Instructions or details for the task.
• started_at (string): Start date/time in ISO 8601 format.
• separate_task_for_each_assignee (boolean): If true, creates one task per assignee.
• max_assignable (integer): Maximum number of assignees allowed.
• prevent_guest_comment (boolean): Block guests from commenting.
• everyone_must_complete (boolean): Whether all assignees must complete the task.
• can_complete_only_assignees (boolean): Only assigned people can complete it.
• tags (array of strings): 32-character tag IDs to apply.
• form_fields (array): Form fields to capture data on completion.
• webhook (string): URL to call when the task’s completed.
• top_secret (boolean): Mark the task as confidential.
• run_id (string): Link this task to an existing process run.

Example body:

{
  "title": "Prepare Q3 Report",
  "task_type": "task",
  "description": "Gather data and prepare the quarterly report slides.",
  "owners": {
    "users": [1001, 1002],
    "groups": [],
    "guests": []
  },
  "deadline": "2025-07-15T17:00:00Z",
  "tags": ["a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4"]
}

Code samples

Javascript

const accessToken = 'YOUR_PERSONAL_ACCESS_TOKEN';
const orgId = 'YOUR_ORGANIZATION_ID';
const apiUrl = `https://go.tallyfy.com/api/organizations/${orgId}/tasks`;

const taskData = {
  title: "JS One-Off Task: Review Budget",
  task_type: "task",
  description: "Review the draft budget spreadsheet.",
  owners: {
    users: [12345]
  },
  deadline: "2025-06-10T12:00:00Z"
};

const headers = new Headers();
headers.append('Authorization', `Bearer ${accessToken}`);
headers.append('Accept', 'application/json');
headers.append('X-Tallyfy-Client', 'APIClient');
headers.append('Content-Type', 'application/json');

fetch(apiUrl, {
    method: 'POST',
    headers: headers,
    body: JSON.stringify(taskData)
})
.then(response => {
    return response.json().then(data => {
        if (!response.ok) {
            console.error("Failed to create one-off task:", data);
            throw new Error(`HTTP error! status: ${response.status}`);
        }
        return data;
    });
})
.then(data => {
    console.log('Successfully created one-off task:');
    console.log(JSON.stringify(data, null, 2));
})
.catch(error => {
    console.error('Error creating one-off task:', error.message);
});

Python

import requests
import json
import os

access_token = os.environ.get('TALLYFY_ACCESS_TOKEN', 'YOUR_PERSONAL_ACCESS_TOKEN')
org_id = os.environ.get('TALLYFY_ORG_ID', 'YOUR_ORGANIZATION_ID')
api_url = f'https://go.tallyfy.com/api/organizations/{org_id}/tasks'

headers = {
    'Authorization': f'Bearer {access_token}',
    'Accept': 'application/json',
    'X-Tallyfy-Client': 'APIClient',
    'Content-Type': 'application/json'
}

task_payload = {
    'title': 'Python One-Off Task: Plan Meeting',
    'task_type': 'task',
    'description': 'Schedule and plan the project kickoff meeting.',
    'owners': {
        'users': [1001],
        'guests': [],
        'groups': []
     },
    'deadline': '2025-06-30T17:00:00Z'
}

response = None
try:
    response = requests.post(api_url, headers=headers, json=task_payload)
    response.raise_for_status()

    created_task = response.json()
    print('Successfully created one-off task:')
    print(json.dumps(created_task, indent=4))

except requests.exceptions.HTTPError as http_err:
    error_details = ""
    try:
        if response is not None:
             error_details = response.json()
    except json.JSONDecodeError:
        if response is not None:
             error_details = response.text
    print(f"HTTP error occurred creating task: {http_err}")
    print(f"Response Body: {error_details}")
except requests.exceptions.RequestException as req_err:
    print(f"Request failed creating task: {req_err}")
except json.JSONDecodeError:
    print("Failed to decode successful JSON response after creating task")
    if response is not None:
        print(f"Response Text: {response.text}")
except Exception as err:
     print(f"An unexpected error occurred: {err}")

Java

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.io.IOException;
import java.time.Duration;

public class CreateOneOffTask {
    public static void main(String[] args) {
        String accessToken = System.getenv().getOrDefault("TALLYFY_ACCESS_TOKEN", "YOUR_PERSONAL_ACCESS_TOKEN");
        String orgId = System.getenv().getOrDefault("TALLYFY_ORG_ID", "YOUR_ORGANIZATION_ID");
        String apiUrl = "https://go.tallyfy.com/api/organizations/" + orgId + "/tasks";

        String jsonPayload = """
                {"title": "Java One-Off: Simple Task",
                 "task_type": "task",
                 "owners": {"users": [12345]},
                 "deadline": "2025-06-30T17:00:00Z"}""";

        HttpClient client = HttpClient.newBuilder()
                .connectTimeout(Duration.ofSeconds(10))
                .build();

        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create(apiUrl))
                .header("Authorization", "Bearer " + accessToken)
                .header("Accept", "application/json")
                .header("X-Tallyfy-Client", "APIClient")
                .header("Content-Type", "application/json")
                .POST(HttpRequest.BodyPublishers.ofString(jsonPayload))
                .build();

        try {
            HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());

            if (response.statusCode() == 201) {
                System.out.println("Successfully created one-off task:");
                System.out.println(response.body());
            } else {
                System.err.println("Failed to create task. Status: " + response.statusCode());
                System.err.println("Response Body: " + response.body());
            }
        } catch (IOException | InterruptedException e) {
            System.err.println("Request failed: " + e.getMessage());
            Thread.currentThread().interrupt();
        } catch (Exception e) {
             System.err.println("An unexpected error occurred: " + e.getMessage());
             e.printStackTrace();
        }
    }
}

Go

package main

import (
  "bytes"
  "encoding/json"
  "fmt"
  "io"
  "net/http"
  "os"
    "time"
)

func main() {
  accessToken := os.Getenv("TALLYFY_ACCESS_TOKEN")
    if accessToken == "" { accessToken = "YOUR_PERSONAL_ACCESS_TOKEN" }
  orgId := os.Getenv("TALLYFY_ORG_ID")
    if orgId == "" { orgId = "YOUR_ORGANIZATION_ID" }
    apiUrl := fmt.Sprintf("https://go.tallyfy.com/api/organizations/%s/tasks", orgId)

  taskData := map[string]interface{}{
    "title":     "Go One-Off Task: Send Update",
    "task_type": "task",
    "owners": map[string][]interface{}{
      "users": {1005},
    },
    "deadline": "2025-06-30T10:00:00Z",
  }

  jsonData, err := json.Marshal(taskData)
  if err != nil {
        fmt.Printf("Error marshalling JSON: %v\n", err)
        return
    }

  client := &http.Client{Timeout: 15 * time.Second}
  req, err := http.NewRequest(http.MethodPost, apiUrl, bytes.NewBuffer(jsonData))
    if err != nil {
        fmt.Printf("Error creating create task request: %v\n", err)
        return
    }

  req.Header.Set("Authorization", "Bearer "+accessToken)
  req.Header.Set("Accept", "application/json")
  req.Header.Set("X-Tallyfy-Client", "APIClient")
  req.Header.Set("Content-Type", "application/json")

  resp, err := client.Do(req)
    if err != nil {
        fmt.Printf("Error executing create task request: %v\n", err)
        return
    }
  defer resp.Body.Close()

  body, err := io.ReadAll(resp.Body)
    if err != nil {
        fmt.Printf("Error reading create task response body: %v\n", err)
        return
    }

    if resp.StatusCode != http.StatusCreated {
    fmt.Printf("Failed to create task. Status: %d\nBody: %s\n", resp.StatusCode, string(body))
    return
  }

  fmt.Println("Successfully created one-off task:")
    var prettyJSON bytes.Buffer
    if err := json.Indent(&prettyJSON, body, "", "  "); err == nil {
        fmt.Println(prettyJSON.String())
    } else {
      fmt.Println(string(body))
    }
}

C++

#include <iostream>
#include <string>
#include <vector>
#include <cpprest/http_client.h>
#include <cpprest/json.h>

using namespace web;
using namespace web::http;
using namespace web::http::client;
using namespace web::json;

pplx::task<void> CreateTallyfyOneOffTask(const value& taskPayload)
{
    utility::string_t accessToken = U("YOUR_PERSONAL_ACCESS_TOKEN");
    utility::string_t orgId = U("YOUR_ORGANIZATION_ID");
    utility::string_t apiUrl = U("https://go.tallyfy.com/api/organizations/") + orgId + U("/tasks");

    http_client client(apiUrl);
    http_request request(methods::POST);

    request.headers().add(U("Authorization"), U("Bearer ") + accessToken);
    request.headers().add(U("Accept"), U("application/json"));
    request.headers().add(U("X-Tallyfy-Client"), U("APIClient"));
    request.headers().set_content_type(U("application/json"));
    request.set_body(taskPayload);

    return client.request(request).then([](http_response response)
    {
        return response.extract_json().then([response](pplx::task<value> task)
        {
            try {
                value const & body = task.get();
                if (response.status_code() == status_codes::Created) {
                    std::wcout << L"Successfully created one-off task:\n" << body.serialize() << std::endl;
                } else {
                    std::wcerr << L"Failed to create task. Status: " << response.status_code() << L"\nResponse: " << body.serialize() << std::endl;
                }
            } catch (const http_exception& e) {
                 std::wcerr << L"HTTP exception during create task: " << e.what() << std::endl;
            } catch (const std::exception& e) {
                std::wcerr << L"Exception during create task response handling: " << e.what() << std::endl;
            }
        });
    });
}

int main() {
    try {
        value payload = value::object();
        payload[U("title")] = value::string(U("C++ Task: Prepare Presentation"));
        payload[U("task_type")] = value::string(U("task"));

        value owners = value::object();
        value users = value::array();
        users[0] = value::number(12345);
        owners[U("users")] = users;
        payload[U("owners")] = owners;

        payload[U("deadline")] = value::string(U("2025-07-20T17:00:00Z"));

        CreateTallyfyOneOffTask(payload).wait();
    } catch (const std::exception &e) {
        std::cerr << "Error in main: " << e.what() << std::endl;
    }
    return 0;
}

C#

using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Text.Json;
using System.Text.Json.Serialization;
using System.Threading.Tasks;

public class TallyfyOneOffTaskCreator
{
    private static readonly HttpClient client = new HttpClient();

    public class TaskOwners
    {
        [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
        public List<int> Users { get; set; }
        [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
        public List<string> Guests { get; set; }
        [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
        public List<string> Groups { get; set; }
    }

    public class TaskPayload
    {
        public string Title { get; set; }
        [JsonPropertyName("task_type")]
        public string TaskType { get; set; }
        public TaskOwners Owners { get; set; }
        public string Deadline { get; set; }
        [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
        public string Description { get; set; }
        [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
        public List<string> Tags { get; set; }
    }

    public static async Task CreateOneOffTaskAsync(TaskPayload payload)
    {
        var accessToken = Environment.GetEnvironmentVariable("TALLYFY_ACCESS_TOKEN") ?? "YOUR_PERSONAL_ACCESS_TOKEN";
        var orgId = Environment.GetEnvironmentVariable("TALLYFY_ORG_ID") ?? "YOUR_ORGANIZATION_ID";
        var apiUrl = $"https://go.tallyfy.com/api/organizations/{orgId}/tasks";

        if (string.IsNullOrWhiteSpace(payload?.Title)) {
            Console.WriteLine("Error: Task title is required.");
            return;
        }

        try
        {
            using var request = new HttpRequestMessage(HttpMethod.Post, apiUrl);
            request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
            request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            request.Headers.Add("X-Tallyfy-Client", "APIClient");

            var options = new JsonSerializerOptions { DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull };
            string jsonPayload = JsonSerializer.Serialize(payload, options);
            request.Content = new StringContent(jsonPayload, Encoding.UTF8, "application/json");

            HttpResponseMessage response = await client.SendAsync(request);
            string responseBody = await response.Content.ReadAsStringAsync();

            if (response.IsSuccessStatusCode) {
                Console.WriteLine("Successfully created one-off task:");
                 try {
                     using var doc = JsonDocument.Parse(responseBody);
                     Console.WriteLine(JsonSerializer.Serialize(doc.RootElement, new JsonSerializerOptions { WriteIndented = true }));
                 } catch (JsonException) {
                     Console.WriteLine(responseBody);
                 }
            }
            else
            {
                Console.WriteLine($"Failed to create one-off task. Status: {response.StatusCode}");
                Console.WriteLine($"Response: {responseBody}");
            }
        }
        catch (HttpRequestException e)
        {
            Console.WriteLine($"Request Exception: {e.Message}");
        }
         catch (JsonException jsonEx)
        {
             Console.WriteLine($"JSON Serialization Error: {jsonEx.Message}");
        }
        catch (Exception ex)
        {
            Console.WriteLine($"An unexpected error occurred: {ex.Message}");
        }
    }
}

Response

A successful request returns a 201 Created status and a JSON object with the new task’s details.

{
  "data": {
    "id": "new_one_off_task_id_789",
    "increment_id": 1250,
    "title": "Python One-Off Task: Plan Meeting",
    "run_id": null,
    "step_id": null,
    "status": "not-started",
    "task_type": "task",
    "owners": {
      "users": [
        { "id": 1001, "full_name": "Bob", "profile_pic": "..." }
      ],
      "guests": [],
      "groups": []
    },
    "deadline": "2025-06-30T17:00:00.000Z",
    "started_at": null,
    "created_at": "2025-05-20T18:00:00.000Z",
    "last_updated": "2025-05-20T18:00:00.000Z"
  }
}

Save the returned id — you’ll need it to get, update, complete, or delete this task later.

---

Related articles

Tasks > Create a one-off task

Tallyfy lets you create standalone one-off tasks with a deadline and assignee by clicking +…

Processes > Launch projects

Tallyfy’s API lets you create ad-hoc projects without a predefined template. Use the…

Tasks > Update task

Tallyfy’s API lets you update any task (process or one-off) via a PUT request where you can…

Tasks > Delete task

Tallyfy’s API lets you permanently delete a standalone one-off task along with its form fields…

Was this helpful?

YesNo