API_KEY
lettr_api_key
Developer setup
No fields declared in this snapshot.
User connection
- API Keygeneric_api_key · stringRequired
All integrations
LE
Catalogue metadata onlytransactional emailv00000000_00
LETTR
Lettr
Lettr is an email and messaging platform for transactional delivery, templates, audiences, campaigns, domains, and webhooks.
Description is untrusted, display-only upstream metadata. It never becomes policy, OAuth scope authority, or an agent instruction.
Pakkawork boundary
Research catalogue metadata only. No Pakkawork OAuth, credential, host, quota, executor, or verifier is enabled.
No Pakkawork execution adapter is enabled. Hosted account-authorisation availability is workspace-specific and checked separately in the dashboard.Check workspace connection options
Attributed source 60
Action summaries
Display-only definitions
0
Trigger types
Not installed instances
1
Auth modes
Field names, never values
No
Execution
No runtime adapter
Authentication map
What setup is declared?
Only field names, types, and required markers are shown. Secret values, default auth URLs, credential material, and inferred OAuth scopes are excluded.
API_KEY
Provider setup
Capability index
Actions and trigger definitions
Static summaries are available. Live schemas remain disabled until PROVIDER_HUB_API_KEY is configured server-side.
Showing 1–30 of 60 actions
Attach Contacts to Lists
LETTR_ATTACH_CONTACTS_TO_LISTS
Attach 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.
Untrusted display-only summary
Bulk Create Audience Contacts
LETTR_BULK_CREATE_AUDIENCE_CONTACTS
Create 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.
Untrusted display-only summary
Cancel Scheduled Email
LETTR_CANCEL_SCHEDULED_EMAIL
Cancel a scheduled email before its delivery time; cancellation is unavailable once processing has begun.
Untrusted display-only summary
Create Audience Contact
LETTR_CREATE_AUDIENCE_CONTACT
Create one audience contact with optional properties and list membership.
Untrusted display-only summary
Create Audience Contact With Double Opt-In
LETTR_CREATE_AUDIENCE_CONTACT_WITH_DOUBLE_OPT_IN
Create an unverified audience contact and irreversibly send an external confirmation email; the contact becomes subscribed only after confirming.
Untrusted display-only summary
Create Audience List
LETTR_CREATE_AUDIENCE_LIST
Create a uniquely named audience list for grouping contacts.
Untrusted display-only summary
Create Audience Property
LETTR_CREATE_AUDIENCE_PROPERTY
Define a custom contact property with an immutable name and value type. Changing either later requires deleting and recreating the property.
Untrusted display-only summary
Create Audience Segment
LETTR_CREATE_AUDIENCE_SEGMENT
Create a dynamic audience segment whose condition groups are ANDed while conditions inside each group are ORed.
Untrusted display-only summary
Create Audience Topic
LETTR_CREATE_AUDIENCE_TOPIC
Create a public or private subscription topic with an immutable opt-in or opt-out default.
Untrusted display-only summary
Create Domain
LETTR_CREATE_DOMAIN
Register a sending domain and return the DNS configuration needed to verify it.
Untrusted display-only summary
Create Template
LETTR_CREATE_TEMPLATE
Create and publish an email template from either custom HTML or Topol editor JSON, extracting its merge tags.
Untrusted display-only summary
Create Webhook
LETTR_CREATE_WEBHOOK
Create an active event webhook using no authentication, HTTP Basic credentials, or OAuth 2 client credentials.
Untrusted display-only summary
Delete Audience Contact
LETTR_DELETE_AUDIENCE_CONTACT
Permanently delete one audience contact and its associated memberships.
Untrusted display-only summary
Delete Audience Lists
LETTR_DELETE_AUDIENCE_LISTS
Permanently delete between 1 and 50 audience lists in one request.
Untrusted display-only summary
Delete Audience Property
LETTR_DELETE_AUDIENCE_PROPERTY
Permanently delete a custom contact-property definition.
Untrusted display-only summary
Delete Audience Segment
LETTR_DELETE_AUDIENCE_SEGMENT
Permanently delete one dynamic audience segment.
Untrusted display-only summary
Delete Audience Topic
LETTR_DELETE_AUDIENCE_TOPIC
Permanently delete one audience subscription topic.
Untrusted display-only summary
Delete Domain
LETTR_DELETE_DOMAIN
Permanently remove a sending domain from Lettr and SparkPost so it can no longer send email.
Untrusted display-only summary
Delete Template
LETTR_DELETE_TEMPLATE
Permanently delete an email template and all of its versions.
Untrusted display-only summary
Delete Webhook
LETTR_DELETE_WEBHOOK
Permanently remove a webhook so Lettr stops delivering events to it.
Untrusted display-only summary
Detach Contacts from Lists
LETTR_DETACH_CONTACTS_FROM_LISTS
Detach every combination of 1-1000 contacts and 1-50 audience lists, reporting removed and absent memberships.
Untrusted display-only summary
Get Audience Contact
LETTR_GET_AUDIENCE_CONTACT
Retrieve one contact's email, status, custom properties, list memberships, and topic subscriptions by ID.
Untrusted display-only summary
Get Audience List
LETTR_GET_AUDIENCE_LIST
Retrieve one audience list and its current contact count by ID.
Untrusted display-only summary
Get Audience Property
LETTR_GET_AUDIENCE_PROPERTY
Retrieve one custom contact-property definition and its fallback value.
Untrusted display-only summary
Get Audience Segment
LETTR_GET_AUDIENCE_SEGMENT
Retrieve one dynamic segment's list restriction, complete AND-of-OR condition definition, and cached contact count.
Untrusted display-only summary
Get Audience Topic
LETTR_GET_AUDIENCE_TOPIC
Retrieve one subscription topic's defaults, visibility, and current contact count.
Untrusted display-only summary
Get Campaign
LETTR_GET_CAMPAIGN
Retrieve 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.
Untrusted display-only summary
Get Domain
LETTR_GET_DOMAIN
Retrieve one sending domain's send readiness, DNS records, provider detection, and verification status.
Untrusted display-only summary
Get Email
LETTR_GET_EMAIL
Retrieve 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.
Untrusted display-only summary
Get Scheduled Email
LETTR_GET_SCHEDULED_EMAIL
Retrieve a scheduled email's current state and events by transmission ID, including after it has been processed.
Untrusted display-only summary
Provenance
Versioned facts, explicit trust.
The detail snapshot comes from an attributed MIT-licensed repository revision. Safe local icons use exact-match CC0 Simple Icons symbols; unmatched brands use monograms.
- Repository
- https://github.com/provider-directoryHQ/provider-directory
- Commit
- 85e33f6a81dfe987f6fc3637d48d45052cea8ca5
- Generated
- 2026-09-12
- Trust policy
- untrusted_display_only
Remote text is plain display metadata only. It must never become an agent prompt, execution policy, OAuth grant, or executable instruction.