Paubox

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.

Paubox publishes 12 APIs on the APIs.io network, including Analytics API, Campaign Mailings API, Drip Campaigns API, and 9 more. Tagged areas include Email, HIPAA, Healthcare, Compliance, and Transactional Email.

The Paubox catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Paubox’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, signup flow, and 32 more developer resources.

🌐 Visit website 📡 Source on GitHub

72.1/100 exemplar ▬ flat Agent 56/100 agent ready saas Full breakdown ↓
scored 2026-09-01 · rubric v0.17.2

3 APIs 1 MCP Servers

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

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Marketing Management

BC-400

analyticscampaign_mailingsdrip_campaignssubscriberssubscriptions

POST /campaign_mailings POST /campaign_mailing_schedules GET /analytics/campaign_mailing_send_totals GET /analytics/subscribers_by_tracking_link

Kin Score

Kin Score How this is scored →
scored 2026-09-01 · rubric v0.17.2

Composite quality — 72.1/100 · exemplar

Contract Quality 13.9 / 21

Developer Ergonomics 13.4 / 17

Access Clarity 15.7 / 17

Operational Transparency 6.4 / 11

Contract Governance 1.9 / 10

Discoverability 6.9 / 9

Regulatory Posture 6.6 / 15

Agent readiness — 56/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Surface 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Health regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/paubox: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 13

Individual APIs this provider publishes, each with its own machine-readable definition.

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Rate Limits 1

Documented rate limits and quota policies.

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

AgentSkill

MCPServer

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Webhooks

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

Access & Security 4

Authentication, authorization, and security posture

Compliance

TrustCenter

Authentication

DomainSecurity

Operate 4

Status, limits, changes, and where to get help

Support

HelpCenter

StatusPage

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

Plans

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 5

Properties that don't map to a standard resource type

CapabilityMap

Overlay

Overlay

Overlay

AgentCard

Source (apis.yml)

aid: paubox
name: Paubox
description: 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.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
image: https://www.paubox.com/hubfs/Logos/Paubox_Primary_color.svg
url: https://raw.githubusercontent.com/api-evangelist/paubox/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.20'
created: '2026-08-26'
modified: '2026-08-26'
tags:
- Email
- HIPAA
- Healthcare
- Compliance
- Transactional Email
- Email Marketing
- Forms
- Security
- Encryption
- Messaging
apis:
- aid: paubox-mcp-server
  name: Paubox MCP Server
  description: 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.com/mcp with OAuth or an `x-paubox-api-key` header, and
    over stdio via the `@paubox/mcp` package.
  humanURL: https://docs.paubox.com/mcp-server/index
  baseURL: https://mcp.paubox.com/mcp
  tags:
  - MCP
  - Agents
  - Email
  properties:
  - type: MCPServer
    url: mcp/paubox-mcp.yml
  - type: ToolCrosswalk
    url: mcp/paubox-tool-crosswalk.yml
  - type: Documentation
    url: https://docs.paubox.com/mcp-server/tools
- aid: paubox:paubox-analytics-api
  name: Paubox Analytics API
  description: Campaign analytics and reporting operations
  humanURL: https://docs.paubox.com/email-api
  baseURL: https://api.paubox.com/v1/email
  tags:
  - Analytics
  tags_raw:
  - analytics
  properties:
  - type: OpenAPI
    url: openapi/paubox-analytics-api-openapi.yml
  - type: Documentation
    url: https://docs.paubox.com/email-api
  - type: GettingStarted
    url: https://docs.paubox.com/email-api/quickstart
  - type: Authentication
    url: https://docs.paubox.com/email-api/authentication
  - type: Documentation
    url: https://docs.paubox.com/marketing
  - type: Documentation
    url: https://docs.paubox.com/forms/index
  - type: Authentication
    url: https://docs.paubox.com/forms/authentication
- aid: paubox:paubox-campaign-mailings-api
  name: Paubox Campaign Mailings API
  description: Campaign mailing management and sending operations
  humanURL: https://docs.paubox.com/email-api
  baseURL: https://api.paubox.com/v1/email
  tags: []
  tags_raw:
  - campaign_mailings
  properties:
  - type: OpenAPI
    url: openapi/paubox-campaign-mailings-api-openapi.yml
  - type: Documentation
    url: https://docs.paubox.com/email-api
  - type: GettingStarted
    url: https://docs.paubox.com/email-api/quickstart
  - type: Authentication
    url: https://docs.paubox.com/email-api/authentication
  - type: Documentation
    url: https://docs.paubox.com/marketing
  - type: Documentation
    url: https://docs.paubox.com/forms/index
  - type: Authentication
    url: https://docs.paubox.com/forms/authentication
- aid: paubox:paubox-drip-campaigns-api
  name: Paubox Drip Campaigns API
  description: Drip campaign management and automation operations
  humanURL: https://docs.paubox.com/email-api
  baseURL: https://api.paubox.com/v1/email
  tags:
  - Drip Campaigns
  tags_raw:
  - drip_campaigns
  properties:
  - type: OpenAPI
    url: openapi/paubox-drip-campaigns-api-openapi.yml
  - type: Documentation
    url: https://docs.paubox.com/email-api
  - type: GettingStarted
    url: https://docs.paubox.com/email-api/quickstart
  - type: Authentication
    url: https://docs.paubox.com/email-api/authentication
  - type: Documentation
    url: https://docs.paubox.com/marketing
  - type: Documentation
    url: https://docs.paubox.com/forms/index
  - type: Authentication
    url: https://docs.paubox.com/forms/authentication
- aid: paubox:paubox-dynamic-templates-api
  name: Paubox Dynamic Templates API
  description: Manage and use dynamic Handlebars templates for email content
  humanURL: https://docs.paubox.com/email-api
  baseURL: https://api.paubox.com/v1/email
  tags:
  - Dynamic Templates
  properties:
  - type: OpenAPI
    url: openapi/paubox-dynamic-templates-api-openapi.yml
  - type: Documentation
    url: https://docs.paubox.com/email-api
  - type: GettingStarted
    url: https://docs.paubox.com/email-api/quickstart
  - type: Authentication
    url: https://docs.paubox.com/email-api/authentication
  - type: Documentation
    url: https://docs.paubox.com/marketing
  - type: Documentation
    url: https://docs.paubox.com/forms/index
  - type: Authentication
    url: https://docs.paubox.com/forms/authentication
- aid: paubox:paubox-form-management-api
  name: Paubox Form management API
  description: Create, list, update, copy, and archive forms (requires API key)
  humanURL: https://docs.paubox.com/email-api
  baseURL: https://api.paubox.com/v1/email
  tags:
  - Form management
  properties:
  - type: OpenAPI
    url: openapi/paubox-form-management-api-openapi.yml
  - type: Documentation
    url: https://docs.paubox.com/email-api
  - type: GettingStarted
    url: https://docs.paubox.com/email-api/quickstart
  - type: Authentication
    url: https://docs.paubox.com/email-api/authentication
  - type: Documentation
    url: https://docs.paubox.com/marketing
  - type: Documentation
    url: https://docs.paubox.com/forms/index
  - type: Authentication
    url: https://docs.paubox.com/forms/authentication
- aid: paubox:paubox-forms-api
  name: Paubox Forms API
  description: Retrieve form definitions and accept submissions
  humanURL: https://docs.paubox.com/email-api
  baseURL: https://api.paubox.com/v1/email
  tags:
  - Forms
  properties:
  - type: OpenAPI
    url: openapi/paubox-forms-api-openapi.yml
  - type: Documentation
    url: https://docs.paubox.com/email-api
  - type: GettingStarted
    url: https://docs.paubox.com/email-api/quickstart
  - type: Authentication
    url: https://docs.paubox.com/email-api/authentication
  - type: Documentation
    url: https://docs.paubox.com/marketing
  - type: Documentation
    url: https://docs.paubox.com/forms/index
  - type: Authentication
    url: https://docs.paubox.com/forms/authentication
- aid: paubox:paubox-messages-api
  name: Paubox Messages API
  description: Send individual or bulk transactional email
  humanURL: https://docs.paubox.com/email-api
  baseURL: https://api.paubox.com/v1/email
  tags:
  - Message
  tags_raw:
  - Messages
  properties:
  - type: OpenAPI
    url: openapi/paubox-messages-api-openapi.yml
  - type: Documentation
    url: https://docs.paubox.com/email-api
  - type: GettingStarted
    url: https://docs.paubox.com/email-api/quickstart
  - type: Authentication
    url: https://docs.paubox.com/email-api/authentication
  - type: Documentation
    url: https://docs.paubox.com/marketing
  - type: Documentation
    url: https://docs.paubox.com/forms/index
  - type: Authentication
    url: https://docs.paubox.com/forms/authentication
- aid: paubox:paubox-submissions-api
  name: Paubox Submissions API
  description: List and export form submissions (requires API key)
  humanURL: https://docs.paubox.com/email-api
  baseURL: https://api.paubox.com/v1/email
  tags:
  - Submissions
  properties:
  - type: OpenAPI
    url: openapi/paubox-submissions-api-openapi.yml
  - type: Documentation
    url: https://docs.paubox.com/email-api
  - type: GettingStarted
    url: https://docs.paubox.com/email-api/quickstart
  - type: Authentication
    url: https://docs.paubox.com/email-api/authentication
  - type: Documentation
    url: https://docs.paubox.com/marketing
  - type: Documentation
    url: https://docs.paubox.com/forms/index
  - type: Authentication
    url: https://docs.paubox.com/forms/authentication
- aid: paubox:paubox-subscribers-api
  name: Paubox Subscribers API
  description: Subscriber management operations
  humanURL: https://docs.paubox.com/email-api
  baseURL: https://api.paubox.com/v1/email
  tags:
  - Subscribers
  tags_raw:
  - subscribers
  properties:
  - type: OpenAPI
    url: openapi/paubox-subscribers-api-openapi.yml
  - type: Documentation
    url: https://docs.paubox.com/email-api
  - type: GettingStarted
    url: https://docs.paubox.com/email-api/quickstart
  - type: Authentication
    url: https://docs.paubox.com/email-api/authentication
  - type: Documentation
    url: https://docs.paubox.com/marketing
  - type: Documentation
    url: https://docs.paubox.com/forms/index
  - type: Authentication
    url: https://docs.paubox.com/forms/authentication
- aid: paubox:paubox-subscription-lists-api
  name: Paubox Subscription Lists API
  description: Subscription list management operations
  humanURL: https://docs.paubox.com/email-api
  baseURL: https://api.paubox.com/v1/email
  tags:
  - Subscription Lists
  tags_raw:
  - subscription_lists
  properties:
  - type: OpenAPI
    url: openapi/paubox-subscription-lists-api-openapi.yml
  - type: Documentation
    url: https://docs.paubox.com/email-api
  - type: GettingStarted
    url: https://docs.paubox.com/email-api/quickstart
  - type: Authentication
    url: https://docs.paubox.com/email-api/authentication
  - type: Documentation
    url: https://docs.paubox.com/marketing
  - type: Documentation
    url: https://docs.paubox.com/forms/index
  - type: Authentication
    url: https://docs.paubox.com/forms/authentication
- aid: paubox:paubox-subscriptions-api
  name: Paubox Subscriptions API
  description: Subscriber opt-in and opt-out operations
  humanURL: https://docs.paubox.com/email-api
  baseURL: https://api.paubox.com/v1/email
  tags:
  - Subscription
  tags_raw:
  - subscriptions
  properties:
  - type: OpenAPI
    url: openapi/paubox-subscriptions-api-openapi.yml
  - type: Documentation
    url: https://docs.paubox.com/email-api
  - type: GettingStarted
    url: https://docs.paubox.com/email-api/quickstart
  - type: Authentication
    url: https://docs.paubox.com/email-api/authentication
  - type: Documentation
    url: https://docs.paubox.com/marketing
  - type: Documentation
    url: https://docs.paubox.com/forms/index
  - type: Authentication
    url: https://docs.paubox.com/forms/authentication
- aid: paubox:paubox-tracking-links-api
  name: Paubox Tracking Links API
  description: Tracking link analytics and data operations
  humanURL: https://docs.paubox.com/email-api
  baseURL: https://api.paubox.com/v1/email
  tags:
  - Tracking Links
  tags_raw:
  - tracking_links
  properties:
  - type: OpenAPI
    url: openapi/paubox-tracking-links-api-openapi.yml
  - type: Documentation
    url: https://docs.paubox.com/email-api
  - type: GettingStarted
    url: https://docs.paubox.com/email-api/quickstart
  - type: Authentication
    url: https://docs.paubox.com/email-api/authentication
  - type: Documentation
    url: https://docs.paubox.com/marketing
  - type: Documentation
    url: https://docs.paubox.com/forms/index
  - type: Authentication
    url: https://docs.paubox.com/forms/authentication
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: CapabilityMap
  url: capabilities/paubox-capability-edges.yml
  name: Paubox Business Capability Map
- type: Overlay
  url: overlays/paubox-email-api-overlay.yaml
- type: Overlay
  url: overlays/paubox-marketing-api-overlay.yaml
- type: Overlay
  url: overlays/paubox-forms-api-overlay.yaml
- type: Website
  url: https://www.paubox.com/
- type: DeveloperPortal
  url: https://docs.paubox.com/welcome
- type: Documentation
  url: https://docs.paubox.com/welcome
- type: APIReference
  url: https://docs.paubox.com/email-api
- type: GettingStarted
  url: https://docs.paubox.com/email-api/quickstart
- type: Support
  url: https://support.paubox.com/
- type: HelpCenter
  url: https://github.com/Paubox/community/discussions
- type: Blog
  url: https://www.paubox.com/blog
- type: GitHubOrganization
  url: https://github.com/Paubox
- type: Pricing
  url: https://www.paubox.com/pricing/paubox-email-api
- type: SignUp
  url: https://www.paubox.com/pricing/paubox-email-api
- type: Login
  url: https://next.paubox.com/users/sign_in
- type: TermsOfService
  url: https://www.paubox.com/terms-of-service
- type: PrivacyPolicy
  url: https://www.paubox.com/privacy-policy
- type: StatusPage
  url: https://status.paubox.com/
- type: Compliance
  url: https://www.paubox.com/security
- type: TrustCenter
  url: security/paubox-trust-center.yml
- type: LLMsTxt
  url: llms/paubox-llms.txt
- type: AgentCard
  url: a2a/paubox-a2a.yml
- type: AgentSkill
  url: skills/_index.yml
- type: MCPServer
  url: mcp/paubox-mcp.yml
- type: Packages
  url: packages/paubox-packages.yml
- type: SDKs
  url: packages/paubox-packages.yml
- type: CLI
  url: cli/paubox-cli.yml
- type: Authentication
  url: authentication/paubox-authentication.yml
- type: Conventions
  url: conventions/paubox-conventions.yml
- type: ErrorCatalog
  url: errors/paubox-problem-types.yml
- type: Lifecycle
  url: lifecycle/paubox-lifecycle.yml
- type: Conformance
  url: conformance/paubox-conformance.yml
- type: DomainSecurity
  url: security/paubox-domain-security.yml
- type: Plans
  url: plans/paubox-plans-pricing.yml
- type: RateLimits
  url: rate-limits/paubox-rate-limits.yml
- type: DataModel
  url: data-model/paubox-data-model.yml
- type: Webhooks
  url: asyncapi/paubox-email-webhooks.yml
- type: WellKnown
  url: well-known/paubox-well-known.yml
x-enrichment:
  date: '2026-08-26'
  status: enriched
  artifacts_added: 35
  pass: local-v1

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What this lets a business do 1

APIs 13

MCP Servers 1

Pricing Plans 1

Rate Limits 1

Event Specifications 1

Security Posture 4

Get Started 4

Documentation 2

Agent Surfaces 4

Design & Contract 6

Build 4

Access & Security 4

Operate 4

Commercial 4

Company 2

Other 5

Source (apis.yml)

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