# Paubox

**Canonical:** https://apis.io/providers/paubox/  
**Website:** https://www.paubox.com/  
**APIs profiled:** 3

Paubox is a HIPAA compliant, HITRUST certified email infrastructure company serving healthcare organizations in the United States. Its products encrypt outbound email without recipient portals, passwords, or plugins, and work alongside Google Workspace and Microsoft 365. The developer surface is three REST APIs on api.paubox.com — the Paubox Email API for transactional email (send, bulk send, message receipt, Handlebars dynamic templates, templated messages) with an SMTP relay alternative at smtp.paubox.com:587; the Paubox Marketing API for HIPAA compliant campaign mailings, drip campaigns, subscribers, subscription lists, tracking links and campaign analytics; and the Paubox Forms API for building, hosting and processing secure patient intake forms with public respondent endpoints and scoped management endpoints. Paubox publishes OpenAPI 3.0 definitions for all three, official SDKs for ten languages, a Node-based CLI, delivery webhooks, an llms.txt, an A2A agent card, a published Agent Skill, and a hosted MCP server at mcp.paubox.com exposing 30 tools across email, forms and marketing.

## Kin Score — 72.1 / 100 (exemplar)

Scored 2026-09-01 under rubric 0.17.2. Trend: flat (+0.0 from 72.1).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 65.5 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 57.9 |
| Developer Ergonomics | 78.6 |
| Commercial Clarity | 92.1 |
| Access Clarity | 92.1 |

Regulatory layer — **Health**: 43.8 (matched via tags).

## Agent readiness — 56.3 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | served |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | verified |
| Rate Limit Signal | documented |
| Event Surface Described | yes |
| Agent Skills | yes |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | served |
| Protected Resource Metadata | verified |
| Dynamic Client Registration | yes |
| Agentic Commerce | no |

## APIs (13)

- **Paubox MCP Server** — Hosted Model Context Protocol server exposing 30 Paubox tools across email, forms and email marketing to MCP-compatible AI clients. Reachable over streamable HTTP at https://mcp...
- **Paubox Analytics API** — Campaign analytics and reporting operations
- **Paubox Campaign Mailings API** — Campaign mailing management and sending operations
- **Paubox Drip Campaigns API** — Drip campaign management and automation operations
- **Paubox Dynamic Templates API** — Manage and use dynamic Handlebars templates for email content
- **Paubox Form management API** — Create, list, update, copy, and archive forms (requires API key)
- **Paubox Forms API** — Retrieve form definitions and accept submissions
- **Paubox Messages API** — Send individual or bulk transactional email
- **Paubox Submissions API** — List and export form submissions (requires API key)
- **Paubox Subscribers API** — Subscriber management operations
- **Paubox Subscription Lists API** — Subscription list management operations
- **Paubox Subscriptions API** — Subscriber opt-in and opt-out operations
- **Paubox Tracking Links API** — Tracking link analytics and data operations

## MCP servers (1)

- **Paubox MCP Server** — Paubox ships a first-party Model Context Protocol server exposing 30 tools across the Email API, Forms API and Marketing API. It is offered over two transports: a hosted streama...

## Security (4)

- **Paubox Authentication** — apiKey/http/oauth2 · 5 schemes
- **Paubox Domain Security** — TLSv1.3 · HSTS · DMARC
- **Paubox Vulnerability Disclosure** — disclosure policy published
- **Paubox Trust Center** — paubox_own, inherited_from_infrastructure

## Plans (1)

- **Paubox Plans Pricing**

## Tags

Email, HIPAA, Healthcare, Compliance, Transactional Email, Email Marketing, Forms, Security, Encryption, Messaging

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/paubox/). Scores are computed from the provider's own public artifacts under a published rubric.