{ "info": { "name": "Lettr — mcp.ai", "description": "REST API for the Lettr MCP. Set {{apiKey}} to a workspace key (sk_live_…) created at https://mcp.ai/settings/api-keys.", "schema": "https://schema.getpostman.com/json/collection/v2.1.0/collection.json" }, "auth": { "type": "bearer", "bearer": [ { "key": "token", "value": "{{apiKey}}", "type": "string" } ] }, "variable": [ { "key": "baseUrl", "value": "https://api.mcp.ai/api/lettr", "type": "string" }, { "key": "apiKey", "value": "sk_live_...", "type": "string" } ], "item": [ { "name": "lettr_attach_contacts_to_lists", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/attach/contacts/to/lists", "host": [ "{{baseUrl}}" ], "path": [ "attach", "contacts", "to", "lists" ] }, "description": "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.", "body": { "mode": "raw", "raw": "{\n \"list_ids\": \"\",\n \"contact_ids\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_bulk_create_audience_contacts", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/bulk/create/audience/contacts", "host": [ "{{baseUrl}}" ], "path": [ "bulk", "create", "audience", "contacts" ] }, "description": "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.", "body": { "mode": "raw", "raw": "{\n \"emails\": \"\",\n \"list_id\": \"\",\n \"properties\": {}\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_cancel_scheduled_email", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/cancel/scheduled/email", "host": [ "{{baseUrl}}" ], "path": [ "cancel", "scheduled", "email" ] }, "description": "Cancel a scheduled email before its delivery time; cancellation is unavailable once processing has begun.", "body": { "mode": "raw", "raw": "{\n \"transmission_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_create_audience_contact", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/create/audience/contact", "host": [ "{{baseUrl}}" ], "path": [ "create", "audience", "contact" ] }, "description": "Create one audience contact with optional properties and list membership.", "body": { "mode": "raw", "raw": "{\n \"email\": \"\",\n \"list_id\": \"\",\n \"properties\": {}\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_create_audience_contact_with_double_opt_in", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/create/audience/contact/with/double/opt/in", "host": [ "{{baseUrl}}" ], "path": [ "create", "audience", "contact", "with", "double", "opt", "in" ] }, "description": "Create an unverified audience contact and irreversibly send an external confirmation email; the contact becomes subscribed only after confirming.", "body": { "mode": "raw", "raw": "{\n \"email\": \"\",\n \"list_id\": \"\",\n \"properties\": {},\n \"double_opt_in\": {}\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_create_audience_list", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/create/audience/list", "host": [ "{{baseUrl}}" ], "path": [ "create", "audience", "list" ] }, "description": "Create a uniquely named audience list for grouping contacts.", "body": { "mode": "raw", "raw": "{\n \"name\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_create_audience_property", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/create/audience/property", "host": [ "{{baseUrl}}" ], "path": [ "create", "audience", "property" ] }, "description": "Define a custom contact property with an immutable name and value type. Changing either later requires deleting and recreating the property.", "body": { "mode": "raw", "raw": "{\n \"name\": \"\",\n \"property_type\": \"\",\n \"fallback_value\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_create_audience_segment", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/create/audience/segment", "host": [ "{{baseUrl}}" ], "path": [ "create", "audience", "segment" ] }, "description": "Create a dynamic audience segment whose condition groups are ANDed while conditions inside each group are ORed.", "body": { "mode": "raw", "raw": "{\n \"name\": \"\",\n \"list_id\": \"\",\n \"conditions\": {}\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_create_audience_topic", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/create/audience/topic", "host": [ "{{baseUrl}}" ], "path": [ "create", "audience", "topic" ] }, "description": "Create a public or private subscription topic with an immutable opt-in or opt-out default.", "body": { "mode": "raw", "raw": "{\n \"name\": \"\",\n \"visibility\": \"\",\n \"description\": \"\",\n \"default_subscription\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_create_domain", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/create/domain", "host": [ "{{baseUrl}}" ], "path": [ "create", "domain" ] }, "description": "Register a sending domain and return the DNS configuration needed to verify it.", "body": { "mode": "raw", "raw": "{\n \"domain\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_create_template", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/create/template", "host": [ "{{baseUrl}}" ], "path": [ "create", "template" ] }, "description": "Create and publish an email template from either custom HTML or Topol editor JSON, extracting its merge tags.", "body": { "mode": "raw", "raw": "{\n \"html\": \"\",\n \"name\": \"\",\n \"folder_id\": 0,\n \"project_id\": 0,\n \"editor_json\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_create_webhook", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/create/webhook", "host": [ "{{baseUrl}}" ], "path": [ "create", "webhook" ] }, "description": "Create an active event webhook using no authentication, HTTP Basic credentials, or OAuth 2 client credentials.", "body": { "mode": "raw", "raw": "{\n \"url\": \"\",\n \"name\": \"\",\n \"events\": \"\",\n \"auth_type\": \"\",\n \"events_mode\": \"\",\n \"auth_password\": \"\",\n \"auth_username\": \"\",\n \"oauth_client_id\": \"\",\n \"oauth_token_url\": \"\",\n \"oauth_client_secret\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_delete_audience_contact", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/delete/audience/contact", "host": [ "{{baseUrl}}" ], "path": [ "delete", "audience", "contact" ] }, "description": "Permanently delete one audience contact and its associated memberships.", "body": { "mode": "raw", "raw": "{\n \"contact_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_delete_audience_lists", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/delete/audience/lists", "host": [ "{{baseUrl}}" ], "path": [ "delete", "audience", "lists" ] }, "description": "Permanently delete between 1 and 50 audience lists in one request.", "body": { "mode": "raw", "raw": "{\n \"list_ids\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_delete_audience_property", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/delete/audience/property", "host": [ "{{baseUrl}}" ], "path": [ "delete", "audience", "property" ] }, "description": "Permanently delete a custom contact-property definition.", "body": { "mode": "raw", "raw": "{\n \"property_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_delete_audience_segment", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/delete/audience/segment", "host": [ "{{baseUrl}}" ], "path": [ "delete", "audience", "segment" ] }, "description": "Permanently delete one dynamic audience segment.", "body": { "mode": "raw", "raw": "{\n \"segment_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_delete_audience_topic", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/delete/audience/topic", "host": [ "{{baseUrl}}" ], "path": [ "delete", "audience", "topic" ] }, "description": "Permanently delete one audience subscription topic.", "body": { "mode": "raw", "raw": "{\n \"topic_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_delete_domain", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/delete/domain", "host": [ "{{baseUrl}}" ], "path": [ "delete", "domain" ] }, "description": "Permanently remove a sending domain from Lettr and SparkPost so it can no longer send email.", "body": { "mode": "raw", "raw": "{\n \"domain\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_delete_template", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/delete/template", "host": [ "{{baseUrl}}" ], "path": [ "delete", "template" ] }, "description": "Permanently delete an email template and all of its versions.", "body": { "mode": "raw", "raw": "{\n \"project_id\": 0,\n \"template_slug\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_delete_webhook", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/delete/webhook", "host": [ "{{baseUrl}}" ], "path": [ "delete", "webhook" ] }, "description": "Permanently remove a webhook so Lettr stops delivering events to it.", "body": { "mode": "raw", "raw": "{\n \"webhook_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_detach_contacts_from_lists", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/detach/contacts/from/lists", "host": [ "{{baseUrl}}" ], "path": [ "detach", "contacts", "from", "lists" ] }, "description": "Detach every combination of 1-1000 contacts and 1-50 audience lists, reporting removed and absent memberships.", "body": { "mode": "raw", "raw": "{\n \"list_ids\": \"\",\n \"contact_ids\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_get_audience_contact", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/get/audience/contact", "host": [ "{{baseUrl}}" ], "path": [ "get", "audience", "contact" ] }, "description": "Retrieve one contact's email, status, custom properties, list memberships, and topic subscriptions by ID.", "body": { "mode": "raw", "raw": "{\n \"contact_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_get_audience_list", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/get/audience/list", "host": [ "{{baseUrl}}" ], "path": [ "get", "audience", "list" ] }, "description": "Retrieve one audience list and its current contact count by ID.", "body": { "mode": "raw", "raw": "{\n \"list_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_get_audience_property", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/get/audience/property", "host": [ "{{baseUrl}}" ], "path": [ "get", "audience", "property" ] }, "description": "Retrieve one custom contact-property definition and its fallback value.", "body": { "mode": "raw", "raw": "{\n \"property_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_get_audience_segment", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/get/audience/segment", "host": [ "{{baseUrl}}" ], "path": [ "get", "audience", "segment" ] }, "description": "Retrieve one dynamic segment's list restriction, complete AND-of-OR condition definition, and cached contact count.", "body": { "mode": "raw", "raw": "{\n \"segment_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_get_audience_topic", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/get/audience/topic", "host": [ "{{baseUrl}}" ], "path": [ "get", "audience", "topic" ] }, "description": "Retrieve one subscription topic's defaults, visibility, and current contact count.", "body": { "mode": "raw", "raw": "{\n \"topic_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_get_campaign", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/get/campaign", "host": [ "{{baseUrl}}" ], "path": [ "get", "campaign" ] }, "description": "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 n", "body": { "mode": "raw", "raw": "{\n \"campaign_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_get_domain", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/get/domain", "host": [ "{{baseUrl}}" ], "path": [ "get", "domain" ] }, "description": "Retrieve one sending domain's send readiness, DNS records, provider detection, and verification status.", "body": { "mode": "raw", "raw": "{\n \"domain\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_get_email", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/get/email", "host": [ "{{baseUrl}}" ], "path": [ "get", "email" ] }, "description": "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.", "body": { "mode": "raw", "raw": "{\n \"to_date\": \"\",\n \"from_date\": \"\",\n \"request_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_get_scheduled_email", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/get/scheduled/email", "host": [ "{{baseUrl}}" ], "path": [ "get", "scheduled", "email" ] }, "description": "Retrieve a scheduled email's current state and events by transmission ID, including after it has been processed.", "body": { "mode": "raw", "raw": "{\n \"transmission_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_get_template", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/get/template", "host": [ "{{baseUrl}}" ], "path": [ "get", "template" ] }, "description": "Retrieve an email template's metadata, active HTML or editor JSON content, and version counts by slug.", "body": { "mode": "raw", "raw": "{\n \"project_id\": 0,\n \"template_slug\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_get_template_merge_tags", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/get/template/merge/tags", "host": [ "{{baseUrl}}" ], "path": [ "get", "template", "merge", "tags" ] }, "description": "Return required and optional merge tags for a template's active or specified version before sending with substitution data.", "body": { "mode": "raw", "raw": "{\n \"version\": 0,\n \"project_id\": 0,\n \"template_slug\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_get_webhook", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/get/webhook", "host": [ "{{baseUrl}}" ], "path": [ "get", "webhook" ] }, "description": "Retrieve one webhook's target, enabled state, event selection, authentication mode, and latest delivery status.", "body": { "mode": "raw", "raw": "{\n \"webhook_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_list_audience_contacts", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/list/audience/contacts", "host": [ "{{baseUrl}}" ], "path": [ "list", "audience", "contacts" ] }, "description": "Return one cursor-controlled page of contacts, optionally filtered by search text, status, list, or segment.", "body": { "mode": "raw", "raw": "{\n \"cursor\": \"\",\n \"search\": \"\",\n \"status\": \"\",\n \"list_id\": \"\",\n \"per_page\": 0,\n \"segment_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_list_audience_lists", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/list/audience/lists", "host": [ "{{baseUrl}}" ], "path": [ "list", "audience", "lists" ] }, "description": "Return one cursor-controlled page of audience lists with each list's contact count.", "body": { "mode": "raw", "raw": "{\n \"cursor\": \"\",\n \"per_page\": 0\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_list_audience_properties", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/list/audience/properties", "host": [ "{{baseUrl}}" ], "path": [ "list", "audience", "properties" ] }, "description": "Return one cursor-controlled page of custom contact-property definitions and fallback values.", "body": { "mode": "raw", "raw": "{\n \"cursor\": \"\",\n \"per_page\": 0\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_list_audience_segments", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/list/audience/segments", "host": [ "{{baseUrl}}" ], "path": [ "list", "audience", "segments" ] }, "description": "Return one cursor-controlled page of dynamic audience segments, including their complete AND-of-OR condition definitions, optionally filtered by list.", "body": { "mode": "raw", "raw": "{\n \"cursor\": \"\",\n \"list_id\": \"\",\n \"per_page\": 0\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_list_audience_topics", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/list/audience/topics", "host": [ "{{baseUrl}}" ], "path": [ "list", "audience", "topics" ] }, "description": "Return one cursor-controlled page of subscription topics with defaults, visibility, and contact counts.", "body": { "mode": "raw", "raw": "{\n \"cursor\": \"\",\n \"per_page\": 0\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_list_campaign_events", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/list/campaign/events", "host": [ "{{baseUrl}}" ], "path": [ "list", "campaign", "events" ] }, "description": "Return 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 ", "body": { "mode": "raw", "raw": "{\n \"email\": \"\",\n \"limit\": 0,\n \"cursor\": \"\",\n \"end_date\": \"\",\n \"event_type\": \"\",\n \"start_date\": \"\",\n \"campaign_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_list_campaigns", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/list/campaigns", "host": [ "{{baseUrl}}" ], "path": [ "list", "campaigns" ] }, "description": "Return one cursor-controlled page of campaigns with complete delivery and engagement statistics, optionally filtered by lifecycle status.", "body": { "mode": "raw", "raw": "{\n \"cursor\": \"\",\n \"status\": \"\",\n \"per_page\": 0\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_list_domains", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/list/domains", "host": [ "{{baseUrl}}" ], "path": [ "list", "domains" ] }, "description": "Return all sending domains with approval, DNS verification, and send-readiness status.", "body": { "mode": "raw", "raw": "{}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_list_email_events", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/list/email/events", "host": [ "{{baseUrl}}" ], "path": [ "list", "email", "events" ] }, "description": "Return one cursor-controlled page of delivery and engagement events across sent emails, with event, recipient, transmission, bounce, and date filters.", "body": { "mode": "raw", "raw": "{\n \"cursor\": \"\",\n \"to_date\": \"\",\n \"per_page\": 0,\n \"from_date\": \"\",\n \"recipients\": \"\",\n \"event_types\": \"\",\n \"bounce_classes\": \"\",\n \"transmission_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_list_emails", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/list/emails", "host": [ "{{baseUrl}}" ], "path": [ "list", "emails" ] }, "description": "Return one cursor-controlled page of sent emails, optionally filtered by recipient and date range.", "body": { "mode": "raw", "raw": "{\n \"cursor\": \"\",\n \"to_date\": \"\",\n \"per_page\": 0,\n \"from_date\": \"\",\n \"recipient\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_list_projects", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/list/projects", "host": [ "{{baseUrl}}" ], "path": [ "list", "projects" ] }, "description": "Return one cursor-controlled page of Lettr projects and their IDs for use with template operations.", "body": { "mode": "raw", "raw": "{\n \"cursor\": \"\",\n \"per_page\": 0\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_list_templates", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/list/templates", "host": [ "{{baseUrl}}" ], "path": [ "list", "templates" ] }, "description": "Return one cursor-controlled page of email templates for a project or the team's default project.", "body": { "mode": "raw", "raw": "{\n \"cursor\": \"\",\n \"per_page\": 0,\n \"project_id\": 0\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_list_webhooks", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/list/webhooks", "host": [ "{{baseUrl}}" ], "path": [ "list", "webhooks" ] }, "description": "Return all event webhooks with target, enabled state, event selection, authentication mode, and latest delivery status.", "body": { "mode": "raw", "raw": "{}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_publish_template_version", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/publish/template/version", "host": [ "{{baseUrl}}" ], "path": [ "publish", "template", "version" ] }, "description": "Create and activate a new version of an existing email template from exactly one of HTML or Topol editor JSON, optionally renaming the template atomically.", "body": { "mode": "raw", "raw": "{\n \"html\": \"\",\n \"name\": \"\",\n \"project_id\": 0,\n \"editor_json\": \"\",\n \"template_slug\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_schedule_campaign", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/schedule/campaign", "host": [ "{{baseUrl}}" ], "path": [ "schedule", "campaign" ] }, "description": "Schedule a campaign for future delivery or reschedule it. The campaign dispatches automatically at that time unless it is unscheduled first.", "body": { "mode": "raw", "raw": "{\n \"campaign_id\": \"\",\n \"scheduled_at\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_schedule_email", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/schedule/email", "host": [ "{{baseUrl}}" ], "path": [ "schedule", "email" ] }, "description": "Create a transactional email scheduled 5 minutes to 3 days in the future; it remains cancellable until processed.", "body": { "mode": "raw", "raw": "{\n \"cc\": \"\",\n \"to\": \"\",\n \"bcc\": \"\",\n \"tag\": \"\",\n \"html\": \"\",\n \"text\": \"\",\n \"headers\": {},\n \"options\": {},\n \"subject\": \"\",\n \"amp_html\": \"\",\n \"metadata\": {},\n \"reply_to\": \"\",\n \"from_name\": \"\",\n \"from_email\": \"\",\n \"project_id\": 0,\n \"attachments\": \"\",\n \"scheduled_at\": \"\",\n \"reply_to_name\": \"\",\n \"template_slug\": \"\",\n \"template_version\": 0,\n \"substitution_data\": {}\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_send_campaign", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/send/campaign", "host": [ "{{baseUrl}}" ], "path": [ "send", "campaign" ] }, "description": "Immediately 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 ", "body": { "mode": "raw", "raw": "{\n \"campaign_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_send_email", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/send/email", "host": [ "{{baseUrl}}" ], "path": [ "send", "email" ] }, "description": "Immediately queue a transactional email to up to 50 recipients using inline content or a Lettr template. This is an irreversible external send.", "body": { "mode": "raw", "raw": "{\n \"cc\": \"\",\n \"to\": \"\",\n \"bcc\": \"\",\n \"tag\": \"\",\n \"html\": \"\",\n \"text\": \"\",\n \"headers\": {},\n \"options\": {},\n \"subject\": \"\",\n \"amp_html\": \"\",\n \"metadata\": {},\n \"reply_to\": \"\",\n \"from_name\": \"\",\n \"from_email\": \"\",\n \"project_id\": 0,\n \"attachments\": \"\",\n \"reply_to_name\": \"\",\n \"template_slug\": \"\",\n \"template_version\": 0,\n \"substitution_data\": {}\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_unschedule_campaign", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/unschedule/campaign", "host": [ "{{baseUrl}}" ], "path": [ "unschedule", "campaign" ] }, "description": "Cancel a scheduled campaign send and return the campaign to draft. The campaign must still be scheduled; this cannot stop one already preparing or sending.", "body": { "mode": "raw", "raw": "{\n \"campaign_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_update_audience_contact", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/update/audience/contact", "host": [ "{{baseUrl}}" ], "path": [ "update", "audience", "contact" ] }, "description": "Change 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 prope", "body": { "mode": "raw", "raw": "{\n \"email\": \"\",\n \"status\": \"\",\n \"contact_id\": \"\",\n \"properties\": {}\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_update_audience_list", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/update/audience/list", "host": [ "{{baseUrl}}" ], "path": [ "update", "audience", "list" ] }, "description": "Rename an audience list while preserving its contacts.", "body": { "mode": "raw", "raw": "{\n \"name\": \"\",\n \"list_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_update_audience_property", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/update/audience/property", "host": [ "{{baseUrl}}" ], "path": [ "update", "audience", "property" ] }, "description": "Set or clear a custom contact property's fallback value. Its name and data type cannot be changed.", "body": { "mode": "raw", "raw": "{\n \"property_id\": \"\",\n \"fallback_value\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_update_audience_segment", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/update/audience/segment", "host": [ "{{baseUrl}}" ], "path": [ "update", "audience", "segment" ] }, "description": "Change 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 ", "body": { "mode": "raw", "raw": "{\n \"name\": \"\",\n \"list_id\": \"\",\n \"conditions\": {},\n \"segment_id\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_update_audience_topic", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/update/audience/topic", "host": [ "{{baseUrl}}" ], "path": [ "update", "audience", "topic" ] }, "description": "Change 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 ca", "body": { "mode": "raw", "raw": "{\n \"name\": \"\",\n \"topic_id\": \"\",\n \"visibility\": \"\",\n \"description\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_update_template", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/update/template", "host": [ "{{baseUrl}}" ], "path": [ "update", "template" ] }, "description": "Rename an email template's metadata without publishing a new version.", "body": { "mode": "raw", "raw": "{\n \"name\": \"\",\n \"project_id\": 0,\n \"template_slug\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_update_webhook", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/update/webhook", "host": [ "{{baseUrl}}" ], "path": [ "update", "webhook" ] }, "description": "Partially update a webhook's name, callback URL, authentication, selected events, or active state. Provide at least one field to update.", "body": { "mode": "raw", "raw": "{\n \"url\": \"\",\n \"name\": \"\",\n \"active\": false,\n \"events\": \"\",\n \"auth_type\": \"\",\n \"webhook_id\": \"\",\n \"auth_password\": \"\",\n \"auth_username\": \"\",\n \"oauth_client_id\": \"\",\n \"oauth_token_url\": \"\",\n \"oauth_client_secret\": \"\"\n}", "options": { "raw": { "language": "json" } } } } }, { "name": "lettr_verify_domain", "request": { "method": "POST", "header": [ { "key": "Content-Type", "value": "application/json" } ], "url": { "raw": "{{baseUrl}}/verify/domain", "host": [ "{{baseUrl}}" ], "path": [ "verify", "domain" ] }, "description": "Run Lettr's DNS verification for a registered domain and return DKIM, CNAME, DMARC, SPF, and ownership results.", "body": { "mode": "raw", "raw": "{\n \"domain\": \"\"\n}", "options": { "raw": { "language": "json" } } } } } ] }