{"passport":{"unfragile":{"@version":"1.0","version":"2026-05","artifact":{"id":"awesome-mailgun","slug":"mailgun","name":"Mailgun","type":"mcp","url":"https://github.com/mailgun/mailgun-mcp-server","page_url":"https://unfragile.ai/mailgun","categories":["mcp-servers"],"tags":[],"pricing":{"model":"open_source","free":true,"starting_price":null},"status":"active","verified":false},"capabilities":[{"id":"awesome-mailgun__cap_0","uri":"capability://tool.use.integration.email.sending.via.smtp.relay.with.domain.validation","name":"email sending via smtp relay with domain validation","description":"Sends emails through Mailgun's SMTP infrastructure by accepting message composition parameters (recipient, subject, body, attachments) and routing them through authenticated SMTP connections. The MCP server translates client requests into Mailgun API calls that handle domain verification, SPF/DKIM configuration validation, and delivery tracking. Supports both simple text and HTML emails with inline attachments and custom headers.","intents":["Send transactional emails from my application without managing SMTP infrastructure","Compose and dispatch emails with attachments programmatically","Route emails through a verified domain with automatic authentication"],"best_for":["Backend developers integrating email into SaaS applications","Teams building notification systems that need reliable delivery","Developers migrating from self-hosted SMTP to managed email services"],"limitations":["Requires pre-configured and verified domain in Mailgun account — cannot send from arbitrary domains","Attachment size limited by Mailgun's API constraints (typically 25MB per message)","No built-in retry logic at MCP layer — relies on Mailgun's backend retry behavior","Synchronous sending only — no native support for scheduled/delayed delivery through MCP interface"],"requires":["Mailgun API key (private key with send permissions)","Pre-verified sending domain configured in Mailgun account","MCP client implementation that can invoke tool calls","Network access to Mailgun API endpoints (api.mailgun.net)"],"input_types":["structured JSON with email fields (to, from, subject, text/html, attachments)","recipient list (single or multiple addresses)","file paths or base64-encoded attachment data"],"output_types":["structured JSON response with message ID and delivery status","error details if validation or sending fails"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mailgun__cap_1","uri":"capability://tool.use.integration.message.delivery.tracking.and.event.webhooks","name":"message delivery tracking and event webhooks","description":"Retrieves delivery status, bounce records, and engagement metrics (opens, clicks, complaints) for sent messages by querying Mailgun's event API. The MCP server exposes tools to fetch event logs filtered by message ID, timestamp, or event type, enabling real-time visibility into email lifecycle. Supports webhook configuration to push delivery events to external systems.","intents":["Check if an email was successfully delivered or bounced","Track open and click events for marketing or transactional emails","Query delivery logs for a specific message or time range","Set up webhooks to react to delivery failures in real-time"],"best_for":["Developers building email monitoring dashboards","Teams implementing bounce handling and list hygiene workflows","Marketing automation platforms tracking engagement metrics"],"limitations":["Event data retention depends on Mailgun plan tier — free tier has limited historical data","Webhook delivery is asynchronous and not guaranteed; requires idempotency handling on receiver side","No built-in filtering for complex queries — must iterate through events client-side for advanced filtering","Engagement tracking (opens/clicks) requires recipient to load images or click links — not 100% reliable"],"requires":["Mailgun API key with read permissions on events","Message ID or timestamp range for querying events","Webhook endpoint URL if configuring push notifications (must be publicly accessible HTTPS)"],"input_types":["message ID (string)","event type filter (e.g., 'delivered', 'bounced', 'opened', 'clicked')","timestamp range (ISO 8601 format)","webhook configuration object (URL, event types to subscribe)"],"output_types":["structured JSON array of events with timestamp, event type, and metadata","webhook registration confirmation","error details if message not found or API limit exceeded"],"categories":["tool-use-integration","data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mailgun__cap_2","uri":"capability://tool.use.integration.batch.email.sending.with.template.rendering","name":"batch email sending with template rendering","description":"Sends emails to multiple recipients with personalized content by accepting a template name, variable map, and recipient list, then invoking Mailgun's batch sending API. The MCP server handles template lookup, variable substitution, and chunking large recipient lists into API-compliant batches. Supports Mailgun's template syntax (Handlebars) for dynamic content insertion per recipient.","intents":["Send personalized emails to a mailing list with recipient-specific variables","Render email templates with dynamic content without managing template engines locally","Dispatch bulk emails efficiently using Mailgun's batch API","Manage recipient variables (name, account ID, etc.) for template personalization"],"best_for":["Marketing teams sending campaigns with personalized content","SaaS platforms sending bulk notifications (password resets, invitations)","Developers building email automation workflows that need template support"],"limitations":["Templates must be pre-created in Mailgun account — no template creation/editing through MCP","Batch API has recipient count limits per request (typically 1000) — large lists require client-side chunking","Template variables are limited to Handlebars syntax — no custom logic or conditional rendering beyond Handlebars capabilities","No A/B testing support through MCP interface — requires manual Mailgun dashboard configuration"],"requires":["Mailgun API key with send permissions","Pre-created email template in Mailgun account","Recipient list with email addresses and variable values","Template variable schema matching Mailgun template definition"],"input_types":["template name (string)","recipient list (array of objects with email and variables)","variable map (object with template variable names and values)"],"output_types":["batch job ID and status","structured JSON with per-recipient delivery status","error details for failed recipients"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mailgun__cap_3","uri":"capability://tool.use.integration.email.validation.and.list.hygiene","name":"email validation and list hygiene","description":"Validates email addresses and identifies invalid, disposable, or risky addresses using Mailgun's email validation API. The MCP server accepts email addresses or lists and returns validation results including syntax checks, domain verification, and risk scoring. Supports bulk validation for list cleaning and real-time validation for signup forms.","intents":["Validate email addresses before adding to mailing lists","Identify and remove invalid or disposable email addresses from existing lists","Check if an email domain is legitimate and accepting mail","Score email addresses for delivery risk before sending campaigns"],"best_for":["Teams managing email lists and preventing bounce rates","SaaS platforms validating user signups","Marketing teams cleaning lists before campaigns"],"limitations":["Validation API has rate limits — bulk validation of large lists requires throttling","Disposable email detection is heuristic-based and may have false positives/negatives","Domain verification checks DNS records but cannot guarantee mailbox existence","Real-time validation adds latency to signup flows — typically 200-500ms per address"],"requires":["Mailgun API key with validation permissions","Email address or list of addresses to validate","Network access to Mailgun validation API endpoints"],"input_types":["single email address (string)","list of email addresses (array of strings)","validation options (syntax check, domain check, risk scoring)"],"output_types":["structured JSON with validation result per address","risk score (0-100) indicating delivery likelihood","detailed validation reason (invalid syntax, domain not found, disposable, etc.)"],"categories":["tool-use-integration","data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mailgun__cap_4","uri":"capability://tool.use.integration.mailing.list.management.and.subscriber.operations","name":"mailing list management and subscriber operations","description":"Creates, updates, and deletes mailing lists and manages subscriber membership through Mailgun's list API. The MCP server exposes tools to add/remove subscribers, update subscriber metadata, and query list membership. Supports subscriber variables for personalization and list segmentation.","intents":["Create and manage mailing lists for campaigns","Add or remove subscribers from lists programmatically","Update subscriber metadata and preferences","Query list membership and subscriber details"],"best_for":["Teams managing subscriber databases and segmentation","SaaS platforms with user mailing lists","Marketing automation systems handling list operations"],"limitations":["List operations are asynchronous — changes may not be immediately visible","Subscriber variables are limited to string values — no complex data structures","No built-in list segmentation or filtering — must manage segments manually","Bulk subscriber operations require chunking — API limits per request"],"requires":["Mailgun API key with list management permissions","List address (e.g., 'subscribers@example.com')","Subscriber email and optional metadata"],"input_types":["list address (string)","subscriber email (string)","subscriber metadata (object with custom variables)","operation type (add, remove, update)"],"output_types":["operation confirmation with subscriber ID","list membership status","error details if operation fails"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mailgun__cap_5","uri":"capability://tool.use.integration.domain.configuration.and.dns.record.management","name":"domain configuration and dns record management","description":"Retrieves and manages domain configuration for sending, including DNS record requirements (SPF, DKIM, CNAME) and verification status. The MCP server exposes tools to query domain settings, retrieve DNS records needed for setup, and check verification status. Does not directly modify DNS records but provides the records required for manual or automated DNS configuration.","intents":["Check if a domain is verified and ready for sending","Retrieve DNS records needed to configure a domain","Verify domain setup status and identify missing configurations","Get DKIM and SPF record details for documentation"],"best_for":["DevOps teams setting up email infrastructure","SaaS platforms with multi-tenant email sending","Developers automating domain onboarding workflows"],"limitations":["MCP tools are read-only — cannot directly modify DNS records","Domain verification is asynchronous — may take time after DNS records are added","DKIM rotation and key management must be handled through Mailgun dashboard","No support for BIMI or other advanced email authentication protocols through MCP"],"requires":["Mailgun API key with domain read permissions","Domain address (e.g., 'mail.example.com')","Access to DNS provider to add records (manual or via separate API)"],"input_types":["domain name (string)","domain type (sending or receiving)"],"output_types":["structured JSON with domain configuration","DNS records required (SPF, DKIM, CNAME, MX)","verification status and any errors"],"categories":["tool-use-integration","data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"awesome-mailgun__cap_6","uri":"capability://tool.use.integration.suppression.list.management.bounces.complaints.unsubscribes","name":"suppression list management (bounces, complaints, unsubscribes)","description":"Manages suppression lists (bounced addresses, spam complaints, unsubscribes) by querying and updating suppression records. The MCP server exposes tools to add addresses to suppression lists, remove addresses, and query suppression status. Prevents sending to addresses known to bounce or complain, improving sender reputation.","intents":["Add bounced or complained addresses to suppression lists","Check if an address is on a suppression list before sending","Remove addresses from suppression lists (e.g., after re-engagement)","Query suppression list statistics and recent additions"],"best_for":["Teams managing sender reputation and bounce rates","Email marketing platforms with list hygiene workflows","SaaS applications handling unsubscribe and complaint management"],"limitations":["Suppression lists are automatically populated by Mailgun from bounces/complaints — manual additions are supplementary","Removing addresses from suppression lists requires explicit action — no automatic re-engagement","Suppression data is account-wide — cannot segment by domain or campaign","No bulk import/export of suppression lists through MCP"],"requires":["Mailgun API key with suppression list permissions","Email address to add/remove/check","Suppression list type (bounces, complaints, unsubscribes)"],"input_types":["email address (string)","suppression type (hard_bounce, soft_bounce, complaint, unsubscribe)","reason or note (optional)"],"output_types":["suppression status (is_suppressed: true/false)","suppression type and timestamp","operation confirmation"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0}],"trust":{"score":25,"verified":false,"data_access_risk":"high","permissions":["Mailgun API key (private key with send permissions)","Pre-verified sending domain configured in Mailgun account","MCP client implementation that can invoke tool calls","Network access to Mailgun API endpoints (api.mailgun.net)","Mailgun API key with read permissions on events","Message ID or timestamp range for querying events","Webhook endpoint URL if configuring push notifications (must be publicly accessible HTTPS)","Mailgun API key with send permissions","Pre-created email template in Mailgun account","Recipient list with email addresses and variable values"],"failure_modes":["Requires pre-configured and verified domain in Mailgun account — cannot send from arbitrary domains","Attachment size limited by Mailgun's API constraints (typically 25MB per message)","No built-in retry logic at MCP layer — relies on Mailgun's backend retry behavior","Synchronous sending only — no native support for scheduled/delayed delivery through MCP interface","Event data retention depends on Mailgun plan tier — free tier has limited historical data","Webhook delivery is asynchronous and not guaranteed; requires idempotency handling on receiver side","No built-in filtering for complex queries — must iterate through events client-side for advanced filtering","Engagement tracking (opens/clicks) requires recipient to load images or click links — not 100% reliable","Templates must be pre-created in Mailgun account — no template creation/editing through MCP","Batch API has recipient count limits per request (typically 1000) — large lists require client-side chunking","builder identity is not verified yet","no observed match outcomes yet"],"rank_breakdown":{"adoption":0.05,"quality":0.24,"ecosystem":0.39999999999999997,"match_graph":0.25,"freshness":0.52,"weights":{"adoption":0.25,"quality":0.25,"ecosystem":0.15,"match_graph":0.23,"freshness":0.12}},"observed_outcomes":{"matches":0,"success_rate":0,"avg_confidence":0,"top_intents":[],"last_matched_at":null},"maintenance":{"status":"active","updated_at":"2026-06-17T09:51:03.578Z","last_scraped_at":"2026-05-03T14:00:15.503Z","last_commit":null},"community":{"stars":null,"forks":null,"weekly_downloads":null,"model_downloads":null,"model_likes":null}},"distribution":{"claim_url":"https://unfragile.ai/submit?claim=mailgun","compare_url":"https://unfragile.ai/compare?artifact=mailgun"}},"signature":"Dwk3gHRbIk0gf8zXDtH5khNx/O/19zxSKLfIQO9WqXYjhPBB8xbA+R/PO92jbxnQVgzIUjDtsIA6ZImTaX06Dw==","signedAt":"2026-06-20T20:46:27.631Z","signedBy":"unfragile.ai","version":1},"_links":{"self":"https://unfragile.ai/api/v1/passport/mailgun","artifact":"https://unfragile.ai/mailgun","verify":"https://unfragile.ai/api/v1/verify?slug=mailgun","publicKey":"https://unfragile.ai/api/v1/trust-passport-public-key","spec":"https://unfragile.ai/trust","schema":"https://unfragile.ai/schema.json","docs":"https://unfragile.ai/docs"}}