Sendfox is an affordable email marketing platform for content creators. Manage contacts, create email campaigns, automate sequences, and grow your audience.
Sendfox is an affordable email marketing platform for content creators. Manage contacts, create email campaigns, automate sequences, and grow your audience. On Nagent, Sendfox is exposed as a fully-configurable email newsletters integration that any agent can call — 17 actions, and API key authentication. No code is required to wire Sendfox into your workflow — connect it once via the External Integrations panel and reuse it across every agent you build.
Agent builders use Sendfox to automate the kinds of tasks email newsletters 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 Sendfox 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 Sendfox, with input parameters and output schema. Drop these into any step of an agent built in Helix.
SENDFOX_DELETE_CONTACT_FROM_LISTTool to remove a contact from a specific list in SendFox. Use when you need to disassociate a contact from a list without deleting the contact entirely. The contact will remain in your account but will no longer be a member of the specified list.
Input parameters
Unique identifier of the list to remove the contact from.
Unique identifier of the contact to remove from the list.
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
SENDFOX_GET_AUTOMATIONSTool to retrieve a list of automations. Use when you need to list all automations for your SendFox account.
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
SENDFOX_GET_CAMPAIGN_BY_IDRetrieve details for a specific campaign by its ID from SendFox. Use this when you need to fetch information about a particular campaign. Returns campaign details including title, subject, HTML content, sender info, and scheduling details.
Input parameters
Unique identifier of the campaign to retrieve.
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
SENDFOX_GET_CAMPAIGNSRetrieve a paginated list of email campaigns from SendFox. Use this to fetch all campaigns or navigate through pages of results. Returns campaign details including status, subject, content, and timestamps.
Input parameters
Page number of the results to fetch (starts at 1). Defaults to 1 if not provided.
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
SENDFOX_GET_CONTACT_BY_IDRetrieves a contact's details by their unique ID from SendFox. Use this tool when you need to look up a specific contact's information after obtaining their ID from a contact list or other API response. Returns contact details including email, name, subscription status, and list memberships.
Input parameters
Unique identifier of the contact to retrieve.
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
SENDFOX_GET_CONTACT_FIELDSRetrieves all contact fields available in the SendFox account. Use this to discover available fields before creating or updating contacts. Returns standard fields (email, first_name, last_name) and any custom fields configured in the account.
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
SENDFOX_GET_CONTACTSTool to retrieve a paginated list of contacts. Use when you need to fetch contacts in pages, optionally filtering by email.
Input parameters
Page number for pagination (starts at 1).
Filter contacts by exact email address to find a specific 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
SENDFOX_GET_CONTACTS_IN_LISTTool to retrieve contacts in a specific list. Use when you need to fetch all contacts belonging to a particular list, optionally filtering by search query.
Input parameters
Search query for filtering contacts by name or email.
Unique identifier of the list to retrieve contacts from.
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
SENDFOX_GET_CURRENT_USERTool to retrieve information about the authenticated user from SendFox. Returns user details including name, email, contact count, and contact limit. Use this tool when you need to check account information or verify authentication status.
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
SENDFOX_GET_FORMSTool to retrieve a paginated list of forms from SendFox. Use when you need to fetch all forms or search for specific forms by query.
Input parameters
Search query for filtering forms by title or other attributes.
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
SENDFOX_GET_LIST_BY_IDRetrieves details of a specific contact list by its ID from SendFox. Use this tool when you need information about a particular list (name, contact count, timestamps). Requires a valid list_id which can be obtained from the 'Get Lists' action.
Input parameters
The unique numeric identifier of the contact list to retrieve. You can obtain list IDs from the 'Get Lists' action.
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
SENDFOX_GET_LISTSRetrieve all contact lists from your SendFox account with pagination support. Use this tool when you need to: - Fetch all available contact lists for your account - Get list IDs to use with other SendFox actions (e.g., adding contacts to lists) - Check list names and browse through paginated results Returns a list of contact lists with their IDs and names, along with pagination metadata.
Input parameters
Page number for pagination (starts at 1). If not specified, returns the first page.
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
SENDFOX_LIST_CONTACT_FIELDSTool to list all custom contact fields defined by the user. Returns a paginated list of contact fields with their IDs, names, and timestamps.
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
SENDFOX_LIST_UNSUBSCRIBED_CONTACTSTool to retrieve a paginated list of contacts who have unsubscribed. Use when you need to fetch unsubscribed contacts, optionally filtering by search query.
Input parameters
Page number to retrieve.
Search query for filtering unsubscribed contacts by name or email.
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
SENDFOX_PATCH_UNSUBSCRIBE_CONTACTUnsubscribe a contact from all email communications in your SendFox account. Use this tool when you need to: - Globally unsubscribe a contact from all future emails - Honor unsubscribe requests from subscribers - Mark a contact as opted-out The contact will be marked as unsubscribed but remains in your contacts database. This is a permanent action - the contact will not receive any future campaigns.
Input parameters
Email address of the contact to unsubscribe. The contact must exist in your SendFox account.
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
SENDFOX_POST_CREATE_CONTACTCreate a new contact (subscriber) in your SendFox account. Use this tool when you need to: - Add a new subscriber to your email list - Create a contact with optional first/last name - Add a contact to one or more specific lists If the contact already exists, their information will be updated with the provided data.
Input parameters
Email address of the contact to create. Must be a valid email format.
Array of list IDs to add the contact to. Use the Get Lists action to retrieve available list IDs.
Last name of the contact. Optional.
First name of the contact. Optional but recommended for personalization.
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
SENDFOX_POST_CREATE_LISTCreate a new contact list in your SendFox account. Use this tool when you need to: - Create a new mailing list for organizing contacts - Set up a list before adding subscribers to it - Segment your audience by creating topic-specific lists The list will be created with 0 contacts initially. After creation, use other SendFox actions to add contacts to this list. Returns the created list's ID, name, and metadata.
Input parameters
Name of the contact list to create
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 95 agents privately built on Nagent that already use Sendfox.
Build on Nagent
Connect Sendfox 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 Sendfox, and click "Connect Now." You'll authenticate with an API key — Nagent handles credential storage and refresh automatically. Once connected, Sendfox is available to any agent in your workspace.
No. Nagent provides no-code integration for every tool. Once Sendfox is connected, you configure its 17 actions directly in the agent builder UI — no API calls, no boilerplate, no schema management.
Helix — Nagent's agentic agent builder — lets you drop Sendfox 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 Sendfox event fires, the agent kicks off automatically.
Every Sendfox 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 Sendfox ships with 17 pre-built email newsletters actions, you can layer custom logic around them inside Helix — pre/post-processing steps, conditional branches, retries, or stitching Sendfox together with other connected tools. For deeper customization, talk to our team about Nagent's Agentic AI Lab — forward-deployed engineers who build Sendfox-based workflows tailored to your business.