1Open Slashspace and go to Settings, then Connectors.
2On Discover, search for Lettr and click Connect.
3Sign in to Lettr in your browser. Slashspace updates when the account is connected.
Then ask for what you need in any Agent mode chat. Lettr is on in every chat unless you switch it off.
What your chats can do
60 tools from Lettr.
Attach Contacts to ListsAttach every combination of 1-1000 contacts and 1-50 audience lists, processing up to 50,000 contact-list pairs and reporting new and existing memberships.
Bulk Create Audience ContactsCreate or recognize up to 1000 normalized, deduplicated contacts. Shared properties affect only newly created contacts; list_id applies to all contacts, including those that already exist.
Cancel Scheduled EmailCancel a scheduled email before its delivery time; cancellation is unavailable once processing has begun.
Create Audience ContactCreate one audience contact with optional properties and list membership.
Create Audience Contact With Double Opt-InCreate an unverified audience contact and irreversibly send an external confirmation email; the contact becomes subscribed only after confirming.
Create Audience ListCreate a uniquely named audience list for grouping contacts.
Create Audience PropertyDefine a custom contact property with an immutable name and value type. Changing either later requires deleting and recreating the property.
Create Audience SegmentCreate a dynamic audience segment whose condition groups are ANDed while conditions inside each group are ORed.
Create Audience TopicCreate a public or private subscription topic with an immutable opt-in or opt-out default.
Create DomainRegister a sending domain and return the DNS configuration needed to verify it.
Create TemplateCreate and publish an email template from either custom HTML or Topol editor JSON, extracting its merge tags.
Create WebhookCreate an active event webhook using no authentication, HTTP Basic credentials, or OAuth 2 client credentials.
Delete Audience ContactPermanently delete one audience contact and its associated memberships.
Delete Audience ListsPermanently delete between 1 and 50 audience lists in one request.
Delete Audience PropertyPermanently delete a custom contact-property definition.
Delete Audience SegmentPermanently delete one dynamic audience segment.
Delete Audience TopicPermanently delete one audience subscription topic.
Delete DomainPermanently remove a sending domain from Lettr and SparkPost so it can no longer send email.
Delete TemplatePermanently delete an email template and all of its versions.
Delete WebhookPermanently remove a webhook so Lettr stops delivering events to it.
Detach Contacts from ListsDetach every combination of 1-1000 contacts and 1-50 audience lists, reporting removed and absent memberships.
Get Audience ContactRetrieve one contact's email, status, custom properties, list memberships, and topic subscriptions by ID.
Get Audience ListRetrieve one audience list and its current contact count by ID.
Get Audience PropertyRetrieve one custom contact-property definition and its fallback value.
Get Audience SegmentRetrieve one dynamic segment's list restriction, complete AND-of-OR condition definition, and cached contact count.
Get Audience TopicRetrieve one subscription topic's defaults, visibility, and current contact count.
Get CampaignRetrieve one campaign's name, subject, sender and reply-to configuration, schedule, rendered HTML, lifecycle state, recipient counts, and engagement statistics. The campaign's audience definition is not returned.
Get DomainRetrieve one sending domain's send readiness, DNS records, provider detection, and verification status.
Get EmailRetrieve a sent email's delivery state, recipients, schedule metadata, and events by request ID. The configurable event date range defaults to the last 10 days, not the email's complete event history.
Get Scheduled EmailRetrieve a scheduled email's current state and events by transmission ID, including after it has been processed.
Get TemplateRetrieve an email template's metadata, active HTML or editor JSON content, and version counts by slug.
Get Template Merge TagsReturn required and optional merge tags for a template's active or specified version before sending with substitution data.
Get WebhookRetrieve one webhook's target, enabled state, event selection, authentication mode, and latest delivery status.
List Audience ContactsReturn one cursor-controlled page of contacts, optionally filtered by search text, status, list, or segment.
List Audience ListsReturn one cursor-controlled page of audience lists with each list's contact count.
List Audience PropertiesReturn one cursor-controlled page of custom contact-property definitions and fallback values.
List Audience SegmentsReturn one cursor-controlled page of dynamic audience segments, including their complete AND-of-OR condition definitions, optionally filtered by list.
List Audience TopicsReturn one cursor-controlled page of subscription topics with defaults, visibility, and contact counts.
List Campaign EventsReturn one cursor-controlled page of a campaign's delivery and engagement events, with event, recipient, and time filters. An empty items page can still have a next_cursor; continue until next_cursor is null.
List CampaignsReturn one cursor-controlled page of campaigns with complete delivery and engagement statistics, optionally filtered by lifecycle status.
List DomainsReturn all sending domains with approval, DNS verification, and send-readiness status.
List Email EventsReturn one cursor-controlled page of delivery and engagement events across sent emails, with event, recipient, transmission, bounce, and date filters.
List Sent EmailsReturn one cursor-controlled page of sent emails, optionally filtered by recipient and date range.
List ProjectsReturn one cursor-controlled page of Lettr projects and their IDs for use with template operations.
List TemplatesReturn one cursor-controlled page of email templates for a project or the team's default project.
List WebhooksReturn all event webhooks with target, enabled state, event selection, authentication mode, and latest delivery status.
Publish Template VersionCreate and activate a new version of an existing email template from exactly one of HTML or Topol editor JSON, optionally renaming the template atomically.
Schedule CampaignSchedule a campaign for future delivery or reschedule it. The campaign dispatches automatically at that time unless it is unscheduled first.
Schedule EmailCreate a transactional email scheduled 5 minutes to 3 days in the future; it remains cancellable until processed.
Send CampaignImmediately and irreversibly start sending a sendable draft campaign to its resolved audience. Only call after confirming the campaign's audience, subject, sender email, and content. A successful 202 response transitions the campaign asynchronously to preparing and the external send cannot be undone.
Send EmailImmediately queue a transactional email to up to 50 recipients using inline content or a Lettr template. This is an irreversible external send.
Unschedule CampaignCancel a scheduled campaign send and return the campaign to draft. The campaign must still be scheduled; this cannot stop one already preparing or sending.
Update Audience ContactChange a contact's email, subscribed or unsubscribed status, or selected custom property values. Provide at least one of email, status, or properties; a null value inside properties removes that property.
Update Audience ListRename an audience list while preserving its contacts.
Update Audience PropertySet or clear a custom contact property's fallback value. Its name and data type cannot be changed.
Update Audience SegmentChange a dynamic segment's name, optional audience-list restriction, or complete AND-of-OR condition definition. Provide at least one of these mutable fields; setting list_id to null removes the list restriction.
Update Audience TopicChange a subscription topic's name, description, or public/private visibility. Provide at least one of these mutable fields; setting description to null clears it. Its default subscription behavior cannot be changed.
Update TemplateRename an email template's metadata without publishing a new version.
Update WebhookPartially update a webhook's name, callback URL, authentication, selected events, or active state. Provide at least one field to update.
Verify DomainRun Lettr's DNS verification for a registered domain and return DKIM, CNAME, DMARC, SPF, and ownership results.
