Scheduling platform for capturing, qualifying, and engaging with inbound leads
Scheduling platform for capturing, qualifying, and engaging with inbound leads On Nagent, Scheduleonce is exposed as a fully-configurable scheduling & booking integration that any agent can call — 27 actions, and API_KEY, OAUTH2 authentication. No code is required to wire Scheduleonce into your workflow — connect it once via the External Integrations panel and reuse it across every agent you build.
Agent builders use Scheduleonce to automate the kinds of tasks scheduling & booking teams previously handled manually. Concrete examples — each one is a single agent step in Nagent — include:
Every action and trigger is paired with a structured input/output schema (visible in the sections below), so when you wire Scheduleonce into Helix — our agentic agent builder — the editor knows exactly what each step expects and produces. Configure once, deploy anywhere across your Nagent agents.
Every operation an agent can call against Scheduleonce, with input parameters and output schema. Drop these into any step of an agent built in Helix.
SCHEDULEONCE_BOOK_TIME_SLOTTool to book a time slot on a booking calendar in OnceHub. Use when you need to schedule a meeting by booking one of the available time slots. First retrieve available time slots using 'Get available time slots', then use this tool to book one of those slots with guest information.
Input parameters
The unique identifier of the booking calendar to book a time slot for (e.g., 'BKC-ZK6W94KE6W')
The date and time of the time slot to book in ISO 8601 format. Must be in UTC timezone (e.g., '2025-12-22T04:30:00.000Z'). Use this with a time slot retrieved from the 'Get available time slots' endpoint.
Form data containing guest information including name, email, and optional fields
Array of custom field objects with 'name' and 'value' properties
Type of location for the meeting. Can only select from locations offered within the available time slots.
Location-specific value. For virtual meetings: conference type (e.g., 'google_meet', 'zoom'). For phone: guest's phone number. For physical locations: address ID (e.g., 'ADD-1234').
The guest's timezone in IANA format (e.g., 'America/New_York', 'Europe/London')
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_CANCEL_BOOKINGTool to cancel a booking by ID in OnceHub. Use when you need to cancel an existing booking, optionally providing a cancellation reason and controlling whether to send cancellation email notifications.
Input parameters
The unique identifier of the booking to cancel (e.g., 'BKNG-J4FR05BKEWEX')
The reason for canceling the booking. This will be stored in the cancel_reschedule_information.reason field of the booking object.
Determines whether a cancellation email notification should be sent to the customer and other participants.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_CREATE_CONTACTTool to create a new contact in ScheduleOnce. Use when you need to add a contact with email, first name, and last name. Additional fields like company, phone, and address details can be optionally provided.
Input parameters
City of the contact.
Email address of the contact (required).
Phone number of the contact.
State or province of the contact.
Company name associated with the contact.
Country of the contact.
Timezone of the contact.
Job title of the contact.
Last name of the contact (required).
Postal or ZIP code of the contact.
First name of the contact (required).
Salutation/title for the contact.
Mobile phone number of the contact.
Street address of the contact.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_CREATE_ONE_TIME_LINK_FOR_BOOKING_CALENDARTool to create a one-time booking link for a booking calendar in OnceHub. Use when you need to generate a unique, single-use booking link for a customer. One-time links are good for one booking only and automatically expire after one year if not used. The booking calendar must be published to create one-time links.
Input parameters
The unique identifier of the booking calendar to create a one-time link for (e.g., 'BKC-ZK6W94KE6W'). The booking calendar must be published.
Model for guest information to personalize the one-time link.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_CREATE_USERTool to create a new user account in OnceHub. Use when you need to add a new user with first name, last name, and email. Optional role can be specified.
Input parameters
Email address of the user (required).
Last name of the user (required).
Role name for the user (e.g., 'Member', 'Admin'). If not specified, the default role will be assigned.
First name of the user (required).
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_DELETE_CONTACTTool to delete a contact by ID from OnceHub. Use when you need to permanently remove a contact from the system.
Input parameters
The unique identifier of the contact to delete (e.g., 'CTC-GLJV69KW2LU30W')
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_DELETE_USERTool to delete a user account from OnceHub. Use when you need to permanently remove a user from the system.
Input parameters
The unique identifier of the user to delete (e.g., 'USR-7R1P5GMSXE')
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_GET_AVAILABLE_TIME_SLOTSTool to retrieve available time slots for a booking calendar from OnceHub. Use when you need to check availability for scheduling appointments within a specific date range (maximum 30 days). Returns real-time availability based on booking rules and participant calendars.
Input parameters
The ID of the booking calendar to query for available time slots. Format: 'BKC-' followed by alphanumeric string (e.g., 'BKC-ZK6W94KE6W')
The end of the time range to search for available slots. Must be in ISO 8601 full form UTC format (e.g., '2024-11-29T09:30:00.000Z' or '2025-12-29T23:59:59Z'). Must be within 30 days of start_time.
The beginning of the time range to search for available slots. Must be in ISO 8601 full form UTC format (e.g., '2024-11-29T09:30:00.000Z' or '2025-12-22T00:00:00Z'). Cannot be more than 30 days before end_time.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_GET_SINGLE_BOOKINGTool to retrieve a single booking by ID from OnceHub. Use when you need to fetch complete booking details including timing, customer information, location, status, and form submission data.
Input parameters
The booking identifier. Format: 'BKNG-' followed by alphanumeric string (e.g., 'BKNG-J4FR05BKEWEX')
Comma-separated list of embedded objects to expand into full objects. Expandable objects include: 'booking_page', 'event_type', 'master_page', 'owner'. Maximum expansion depth is 2 levels. Example: 'booking_page,event_type'. Note: Expanding data causes additional lookups and may result in slower response times.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_GET_SINGLE_BOOKING_CALENDARTool to retrieve a single booking calendar by ID from OnceHub. Use when you need to fetch detailed information about a specific booking calendar including its subject, name, URL, host, published status, and duration.
Input parameters
The unique identifier of the booking calendar to retrieve (e.g., 'BKC-ZK6W94KE6W' or 'BKC-LDJ878496X')
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_GET_SINGLE_CONTACTTool to retrieve a single contact by ID from OnceHub. Use when you need to fetch complete contact details including personal information, location data, and custom fields.
Input parameters
The unique identifier of the contact to retrieve (e.g., 'CTC-J4FR05BKEW' or 'CTC-GLJV69KW2LU30W')
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_GET_SINGLE_MASTER_PAGETool to retrieve a single master page by ID from OnceHub. Use when you need to fetch complete master page details including name, label, URL, and active status.
Input parameters
The unique identifier of the master page to retrieve. Format: MP-XXXXXXXXXXXX (e.g., 'MP-73E6RHFU77' or 'MP-TEST123456')
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_GET_SINGLE_USERTool to retrieve a single user by ID from OnceHub. Use when you need to fetch detailed information about a specific user including their name, email, status, role, timezone, and team associations.
Input parameters
The unique identifier of the user to retrieve (e.g., 'USR-GB59HWQCXF' or 'USR-FSD423423')
Comma-separated list of embedded objects to expand in the response. By default, embedded objects are collapsed to their IDs. Example: 'teams'. Maximum expansion depth is 2 levels.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_GET_USER_SCHEDULING_AVAILABILITYTool to get user scheduling availability from OnceHub. Use when you need to retrieve a user's weekly schedule, working hours, and any date-specific overrides.
Input parameters
The unique identifier of the user (e.g., 'USR-GB59HWQCXF')
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_LIST_ALL_BOOKING_CALENDARSTool to list all booking calendars in the account. Use when you need to retrieve all booking calendars with optional cursor-based pagination.
Input parameters
Object ID for cursor-based pagination. Returns objects after this ID in reverse chronological order. Mutually exclusive with 'before'.
Number of objects to return, between 1-100. Default is 10.
Object ID for cursor-based pagination. Returns objects before this ID in reverse chronological order. Mutually exclusive with 'after'.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_LIST_ALL_BOOKING_PAGESTool to list all booking pages in the account. Use when you need to retrieve all booking pages with optional cursor-based pagination.
Input parameters
Object ID for cursor-based pagination. Returns objects after this ID in reverse chronological order. Mutually exclusive with 'before'.
Number of objects to return, between 1-100. Default is 10.
Object ID for cursor-based pagination. Returns objects before this ID in reverse chronological order. Mutually exclusive with 'after'.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_LIST_ALL_BOOKINGSTool to list all bookings in the account. Use when you need to retrieve bookings with optional filtering by time ranges, pagination, or expansion of related objects.
Input parameters
Object ID for cursor-based pagination. Returns objects after this ID.
Number of objects to return, between 1-100. Default is 10.
Object ID for cursor-based pagination. Returns objects before this ID. Mutually exclusive with 'after'.
Comma-separated list of objects to expand (e.g., 'booking_page', 'event_type', 'master_page', 'owner'). By default, embedded objects return only IDs.
Filter bookings created after specified time (ISO 8601 format).
Filter bookings with starting time greater than specified timestamp (ISO 8601 format).
Filter bookings with starting time less than specified timestamp (ISO 8601 format).
Filter bookings updated after specified time (ISO 8601 format). Includes new, canceled, rescheduled, no-show, and completed bookings.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_LIST_ALL_CONTACTSTool to list all contacts in the OnceHub account. Use when you need to retrieve contact information with optional filtering by creation time, update time, owner, or cursor-based pagination.
Input parameters
Object ID for cursor-based pagination. Returns objects after this ID in reverse chronological order.
Number of objects to return, between 1-100. Default is 10.
Object ID for cursor-based pagination. Returns objects before this ID in reverse chronological order. Mutually exclusive with 'after'.
Filter contacts created after specified timestamp (ISO 8601 format).
Filter contacts created before specified timestamp (ISO 8601 format).
Filter contacts updated after specified timestamp (ISO 8601 format).
Filter contacts updated before specified timestamp (ISO 8601 format).
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_LIST_ALL_EVENT_TYPESTool to list all event types in the account. Use when you need to retrieve all event types with optional cursor-based pagination to understand available event type options.
Input parameters
Object ID for cursor-based pagination. Returns objects after this ID in reverse chronological order. Mutually exclusive with 'before'.
Number of objects to return, between 1-100. Default is 10.
Object ID for cursor-based pagination. Returns objects before this ID in reverse chronological order. Mutually exclusive with 'after'.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_LIST_ALL_MASTER_PAGESTool to list all master pages in the account. Use when you need to retrieve all master pages with optional cursor-based pagination.
Input parameters
Object ID for cursor-based pagination. Returns objects after this ID in reverse chronological order. Mutually exclusive with 'before'.
Number of objects to return, between 1-100. Default is 10.
Object ID for cursor-based pagination. Returns objects before this ID in reverse chronological order. Mutually exclusive with 'after'.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_LIST_ALL_TEAMSTool to list all teams in the OnceHub account. Use when you need to retrieve team information with optional cursor-based pagination.
Input parameters
Object ID for cursor-based pagination. Returns objects after this ID in reverse chronological order.
Number of objects to return, between 1-100. Default is 25.
Object ID for cursor-based pagination. Returns objects before this ID in reverse chronological order. Mutually exclusive with 'after'.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_LIST_ALL_USERSTool to list all users in the OnceHub account. Use when you need to retrieve user information with optional cursor-based pagination.
Input parameters
Object ID for cursor-based pagination. Returns objects after this ID in reverse chronological order.
Number of objects to return, between 1-100. Default is 10.
Object ID for cursor-based pagination. Returns objects before this ID in reverse chronological order. Mutually exclusive with 'after'.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_MARK_BOOKING_AS_NO_SHOWTool to mark a completed booking as no-show in OnceHub. Use when the customer did not attend the scheduled meeting and you need to update the booking status to reflect the no-show.
Input parameters
The unique identifier of the booking to mark as no-show (e.g., 'BKNG-J4FR05BKEWEX'). The booking must exist and be in a valid state to be marked as no-show.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_TEST_API_KEYTool to validate API key authentication for OnceHub. Use when you need to verify that your API key is valid and active before making other API calls to the platform.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_UPDATE_CONTACTTool to update an existing contact in ScheduleOnce. Use when you need to modify contact information such as name, email, company, or phone number.
Input parameters
Unique identifier of the contact to update (e.g., 'CTC-W35G2NEQ2PC6QX').
Updated email address of the contact.
Updated phone number of the contact.
Updated company name associated with the contact.
Updated last name of the contact.
Updated first name of the contact.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_UPDATE_USERTool to update an existing user in OnceHub. Use when you need to modify user information such as name, email, role, or timezone.
Input parameters
The unique identifier of the user to update (e.g., 'USR-DQ27BRAJ4L').
Updated email address of the user.
Updated timezone for the user (e.g., 'America/Chicago', 'Europe/London').
Updated last name of the user.
Updated role name for the user (e.g., 'Member', 'Admin').
Updated first name of the user.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
SCHEDULEONCE_UPDATE_USER_SCHEDULING_AVAILABILITYTool to update user scheduling availability in OnceHub. Use when you need to modify a user's weekly schedule, set working hours for specific days, or add date-specific overrides for holidays or special events.
Input parameters
The unique identifier of the user (e.g., 'USR-GB59HWQCXF')
Weekly schedule containing availability for each day of the week. Must include entries for all 7 days.
Timezone for the scheduling availability (e.g., 'America/New_York', 'Asia/Kolkata'). Must be a valid IANA timezone identifier.
List of specific date overrides that modify the weekly schedule. Use this for holidays, vacation days, or special availability.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
No publicly available marketplace agent is found using this tool yet. There are 88 agents privately built on Nagent that already use Scheduleonce.
Build on Nagent
Connect Scheduleonce to any Nagent agent in minutes — no API key management, no boilerplate. Just configure and deploy.
The five questions agent builders ask before adopting a new integration.
Open the External Integrations panel inside Nagent (app.nagent.ai/externalIntegration), find Scheduleonce, and click "Connect Now." You'll authenticate with API_KEY, OAUTH2 — Nagent handles credential storage and refresh automatically. Once connected, Scheduleonce is available to any agent in your workspace.
No. Nagent provides no-code integration for every tool. Once Scheduleonce is connected, you configure its 27 actions directly in the agent builder UI — no API calls, no boilerplate, no schema management.
Helix — Nagent's agentic agent builder — lets you drop Scheduleonce steps into any workflow visually. Pick an action (e.g., one of those listed above), fill in the inputs (Helix knows the required vs. optional schema for each parameter), and connect it to upstream/downstream steps. Triggers run as the entry point of an agent, so when a Scheduleonce event fires, the agent kicks off automatically.
Every Scheduleonce action and trigger ships with a fully-typed schema — input parameters with name, type, required flag, and description, plus the output payload shape. The schemas are documented in the sections above. Helix uses these schemas to validate your configuration at build time and to type-check the data flowing between steps.
Yes. While Scheduleonce ships with 27 pre-built scheduling & booking actions, you can layer custom logic around them inside Helix — pre/post-processing steps, conditional branches, retries, or stitching Scheduleonce together with other connected tools. For deeper customization, talk to our team about Nagent's Agentic AI Lab — forward-deployed engineers who build Scheduleonce-based workflows tailored to your business.