Constant Contact website screenshot

Constant Contact

Constant Contact is a small-business email and digital marketing platform offering email campaigns, automation, SMS, contact management, surveys, and events. The Constant Contact V3 API is a REST + JSON, OAuth2-protected service published at api.cc.email/v3 covering accounts, contacts, lists, tags, custom fields, segments, email campaigns, A/B tests, schedules and tests, bulk activities (CSV/JSON import, export, list and tag mutations), events with registration and check-in, reporting, and partner provisioning.

Constant Contact publishes 17 APIs on the APIs.io network, including Account Services API, Bulk Activities API, Contact Lists API, and 14 more. Tagged areas include Campaigns, Contacts, Email Marketing, Events, and Reporting.

The Constant Contact catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Constant Contact’s developer surface includes authentication, developer portal, getting-started guide, API reference, support, engineering blog, and 15 more developer resources.

🌐 Visit website 📡 Source on GitHub
51.4/100 developing ▼ -6.9 Agent 31/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessPaidSelf serve
17 APIs 16 Features
CampaignsContactsEmail MarketingEventsReportingSMSSurveys

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 51.4/100 · developing
Contract Quality 12.4 / 25
Developer Ergonomics 8.7 / 20
Commercial Clarity 12.1 / 20
Operational Transparency 6.8 / 13
Governance 7.0 / 12
Discoverability 7.4 / 10
Agent readiness — 31/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
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/constant-contact: 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 17

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

Constant Contact Account Services API

Use the account endpoints and methods to get account information.

Constant Contact Bulk Activities API

Bulk activities endpoints are used to manage large numbers of contacts, lists, and tags.

Constant Contact Contact Lists API

Endpoints and methods to get, create, delete, and update one or more contact lists.

Constant Contact Contact Tags API

Endpoints and methods to get, create, delete, and update one or more contact tags.

Constant Contact Contacts API

Endpoints and methods to get, create, delete, and update one or more contacts.

Constant Contact Contacts Custom Fields API

Endpoints and methods to get, create, delete, and update on one or more custom fields.

Constant Contact Contacts Reporting API

Contact reporting endpoints are used to gather activity reports for campaigns sent to a contact.

Constant Contact Email Campaigns AB Tests API

Use email campaigns A/B Test endpoints and methods to get, create, delete and update A/B tests.

Constant Contact Email Campaigns API

Use email campaign endpoints and methods to get, create, and update email campaigns.

Constant Contact Email Reporting API

Use the email reporting endpoints and methods to get reporting data for email campaigns you sent to contacts.

Constant Contact Email Scheduling API

Use email scheduling endpoints and methods to schedule an email campaign activity, unschedule an email campaign activity, and GET schedule information.

Constant Contact Events API

Endpoints and methods used to create and manage events.

Constant Contact Landing Pages Reporting API

Use landing pages reporting endpoints and methods to get reporting data about how a contact interacted with a campaign activity.

Constant Contact Segments API

Use segments to target a subset of your contacts that are most likely to engage with a particular campaign.

Constant Contact SMS Reporting API

Use SMS reporting endpoints and methods to get reporting data about SMS campaigns.

Constant Contact Technology Partners API

Use partner endpoints to manage client Constant Contact accounts under your partner account.

Constant Contact Technology Partners Webhooks API

Use partner webhooks to subscribe to billing event notifications from Constant Contact.

Scroll for all 17

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

AppConnect V3

OPEN COLLECTION

GraphQL 1

GraphQL schemas published by this provider.

Constant Contact GraphQL Schema

This directory contains a conceptual GraphQL schema for the Constant Contact V3 API. Constant Contact is a small-business email and digital marketing platform offering email cam...

GRAPHQL

Pricing Plans 1

Published pricing tiers and plan structures.

Constant Contact Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Constant Contact Rate Limits

3 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Constant Contact Finops

FINOPS

Features 16

Notable capabilities this provider offers.

Lite: $12/mo for 500 contacts (jumps to $50/mo at 1K)
Standard: mid-tier with A/B testing, segmentation
Premium: $80/mo at 500 contacts with 24x email ratio
Email overages: $0.002 per additional email
REST API v3 at api.cc.email/v3
API limit: 4 req/sec, 10K req/day per app
OAuth 2.0
Webhooks for contact and campaign events
Contacts, lists, segments, custom fields
Email Templates and Drag-and-Drop editor
Marketing Automation (Standard+)
Surveys, landing pages, social media posts
Reporting on opens, clicks, bounces, conversions
E-commerce integrations (Shopify, WooCommerce, etc.)
Event marketing and registration
List building tools and lead capture

Scroll for all 16

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Constant Contact Context

0 classes · 8 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Constant Contact API Rules

5 rules · 4 warnings 1 info

SPECTRAL

Constant Contact API Rules

9 rules · 3 errors 5 warnings 1 info

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

Constant Contact Email Campaign

8 properties

JSON SCHEMA

Constant Contact Contact

17 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Constant Contact Structure

0 properties

JSON STRUCTURE

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Constant Contact Authentication

apiKey/oauth2 · 3 schemes

SECURITY

Constant Contact Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Constant Contact Agentic Access

120 operations · 60 acting · 2 human-in-the-loop

120 operations · 60 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Portal
Portal
 GettingStarted
GettingStarted

Documentation 4

Reference material describing how the API behaves

APIReference
APIReference
 OpenAPI
OpenAPI
 JSONSchema
JSONSchema
 JSONSchema
JSONSchema

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

JSONLD
JSONLD
 Spectral
Spectral

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication
 Authentication
Authentication

Operate 3

Status, limits, changes, and where to get help

StatusPage
StatusPage
 Support
Support
 Community
Community

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy
PrivacyPolicy
 TermsOfService
TermsOfService

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: constant-contact
name: Constant Contact
url: https://raw.githubusercontent.com/api-evangelist/constant-contact/refs/heads/main/apis.yml
tags:
- Campaigns
- Contacts
- Email Marketing
- Events
- Reporting
- SMS
- Surveys
type: Index
accessModel:
  pricing: paid
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Paid · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/constant-contact.png
access: 3rd-Party
created: '2025-03-01'
modified: '2026-05-19'
position: Consumer
specificationVersion: '0.19'
kind: company
description: Constant Contact is a small-business email and digital marketing platform offering email campaigns, automation,
  SMS, contact management, surveys, and events. The Constant Contact V3 API is a REST + JSON, OAuth2-protected service published
  at api.cc.email/v3 covering accounts, contacts, lists, tags, custom fields, segments, email campaigns, A/B tests, schedules
  and tests, bulk activities (CSV/JSON import, export, list and tag mutations), events with registration and check-in, reporting,
  and partner provisioning.
apis:
- aid: constant-contact:constant-contact-account-services-api
  name: Constant Contact Account Services API
  description: Use the account endpoints and methods to get account information.
  humanURL: https://developer.constantcontact.com/
  baseURL: https://api.cc.email/v3
  tags:
  - Account Services
  properties:
  - type: OpenAPI
    url: openapi/constant-contact-account-services-api-openapi.yml
  - type: Documentation
    url: https://developer.constantcontact.com/
  - type: GettingStarted
    url: https://developer.constantcontact.com/api_guide/index.html
  - type: Authentication
    url: https://developer.constantcontact.com/api_guide/auth_overview.html
  - type: GraphQL
    url: graphql/constant-contact-graphql.md
- aid: constant-contact:constant-contact-bulk-activities-api
  name: Constant Contact Bulk Activities API
  description: Bulk activities endpoints are used to manage large numbers of contacts, lists, and tags.
  humanURL: https://developer.constantcontact.com/
  baseURL: https://api.cc.email/v3
  tags:
  - Bulk Activities
  properties:
  - type: OpenAPI
    url: openapi/constant-contact-bulk-activities-api-openapi.yml
  - type: Documentation
    url: https://developer.constantcontact.com/
  - type: GettingStarted
    url: https://developer.constantcontact.com/api_guide/index.html
  - type: Authentication
    url: https://developer.constantcontact.com/api_guide/auth_overview.html
  - type: GraphQL
    url: graphql/constant-contact-graphql.md
- aid: constant-contact:constant-contact-contact-lists-api
  name: Constant Contact Contact Lists API
  description: Endpoints and methods to get, create, delete, and update one or more contact lists.
  humanURL: https://developer.constantcontact.com/
  baseURL: https://api.cc.email/v3
  tags:
  - Contact Lists
  properties:
  - type: OpenAPI
    url: openapi/constant-contact-contact-lists-api-openapi.yml
  - type: Documentation
    url: https://developer.constantcontact.com/
  - type: GettingStarted
    url: https://developer.constantcontact.com/api_guide/index.html
  - type: Authentication
    url: https://developer.constantcontact.com/api_guide/auth_overview.html
  - type: GraphQL
    url: graphql/constant-contact-graphql.md
- aid: constant-contact:constant-contact-contact-tags-api
  name: Constant Contact Contact Tags API
  description: Endpoints and methods to get, create, delete, and update one or more contact tags.
  humanURL: https://developer.constantcontact.com/
  baseURL: https://api.cc.email/v3
  tags:
  - Contact Tags
  properties:
  - type: OpenAPI
    url: openapi/constant-contact-contact-tags-api-openapi.yml
  - type: Documentation
    url: https://developer.constantcontact.com/
  - type: GettingStarted
    url: https://developer.constantcontact.com/api_guide/index.html
  - type: Authentication
    url: https://developer.constantcontact.com/api_guide/auth_overview.html
  - type: GraphQL
    url: graphql/constant-contact-graphql.md
- aid: constant-contact:constant-contact-contacts-api
  name: Constant Contact Contacts API
  description: Endpoints and methods to get, create, delete, and update one or more contacts.
  humanURL: https://developer.constantcontact.com/
  baseURL: https://api.cc.email/v3
  tags:
  - Contacts
  properties:
  - type: OpenAPI
    url: openapi/constant-contact-contacts-api-openapi.yml
  - type: Documentation
    url: https://developer.constantcontact.com/
  - type: GettingStarted
    url: https://developer.constantcontact.com/api_guide/index.html
  - type: Authentication
    url: https://developer.constantcontact.com/api_guide/auth_overview.html
  - type: GraphQL
    url: graphql/constant-contact-graphql.md
- aid: constant-contact:constant-contact-contacts-custom-fields-api
  name: Constant Contact Contacts Custom Fields API
  description: Endpoints and methods to get, create, delete, and update on one or more custom fields.
  humanURL: https://developer.constantcontact.com/
  baseURL: https://api.cc.email/v3
  tags:
  - Contacts Custom Fields
  properties:
  - type: OpenAPI
    url: openapi/constant-contact-contacts-custom-fields-api-openapi.yml
  - type: Documentation
    url: https://developer.constantcontact.com/
  - type: GettingStarted
    url: https://developer.constantcontact.com/api_guide/index.html
  - type: Authentication
    url: https://developer.constantcontact.com/api_guide/auth_overview.html
  - type: GraphQL
    url: graphql/constant-contact-graphql.md
- aid: constant-contact:constant-contact-contacts-reporting-api
  name: Constant Contact Contacts Reporting API
  description: Contact reporting endpoints are used to gather activity reports for campaigns sent to a contact.
  humanURL: https://developer.constantcontact.com/
  baseURL: https://api.cc.email/v3
  tags:
  - Contacts Reporting
  properties:
  - type: OpenAPI
    url: openapi/constant-contact-contacts-reporting-api-openapi.yml
  - type: Documentation
    url: https://developer.constantcontact.com/
  - type: GettingStarted
    url: https://developer.constantcontact.com/api_guide/index.html
  - type: Authentication
    url: https://developer.constantcontact.com/api_guide/auth_overview.html
  - type: GraphQL
    url: graphql/constant-contact-graphql.md
- aid: constant-contact:constant-contact-email-campaigns-ab-tests-api
  name: Constant Contact Email Campaigns AB Tests API
  description: Use email campaigns A/B Test endpoints and methods to get, create, delete and update A/B tests.
  humanURL: https://developer.constantcontact.com/
  baseURL: https://api.cc.email/v3
  tags:
  - Email Campaigns AB Tests
  properties:
  - type: OpenAPI
    url: openapi/constant-contact-email-campaigns-ab-tests-api-openapi.yml
  - type: Documentation
    url: https://developer.constantcontact.com/
  - type: GettingStarted
    url: https://developer.constantcontact.com/api_guide/index.html
  - type: Authentication
    url: https://developer.constantcontact.com/api_guide/auth_overview.html
  - type: GraphQL
    url: graphql/constant-contact-graphql.md
- aid: constant-contact:constant-contact-email-campaigns-api
  name: Constant Contact Email Campaigns API
  description: Use email campaign endpoints and methods to get, create, and update email campaigns.
  humanURL: https://developer.constantcontact.com/
  baseURL: https://api.cc.email/v3
  tags:
  - Email Campaigns
  properties:
  - type: OpenAPI
    url: openapi/constant-contact-email-campaigns-api-openapi.yml
  - type: Documentation
    url: https://developer.constantcontact.com/
  - type: GettingStarted
    url: https://developer.constantcontact.com/api_guide/index.html
  - type: Authentication
    url: https://developer.constantcontact.com/api_guide/auth_overview.html
  - type: GraphQL
    url: graphql/constant-contact-graphql.md
- aid: constant-contact:constant-contact-email-reporting-api
  name: Constant Contact Email Reporting API
  description: Use the email reporting endpoints and methods to get reporting data for email campaigns you sent to contacts.
  humanURL: https://developer.constantcontact.com/
  baseURL: https://api.cc.email/v3
  tags:
  - Email Reporting
  properties:
  - type: OpenAPI
    url: openapi/constant-contact-email-reporting-api-openapi.yml
  - type: Documentation
    url: https://developer.constantcontact.com/
  - type: GettingStarted
    url: https://developer.constantcontact.com/api_guide/index.html
  - type: Authentication
    url: https://developer.constantcontact.com/api_guide/auth_overview.html
  - type: GraphQL
    url: graphql/constant-contact-graphql.md
- aid: constant-contact:constant-contact-email-scheduling-api
  name: Constant Contact Email Scheduling API
  description: Use email scheduling endpoints and methods to schedule an email campaign activity, unschedule an email campaign
    activity, and GET schedule information.
  humanURL: https://developer.constantcontact.com/
  baseURL: https://api.cc.email/v3
  tags:
  - Email Scheduling
  properties:
  - type: OpenAPI
    url: openapi/constant-contact-email-scheduling-api-openapi.yml
  - type: Documentation
    url: https://developer.constantcontact.com/
  - type: GettingStarted
    url: https://developer.constantcontact.com/api_guide/index.html
  - type: Authentication
    url: https://developer.constantcontact.com/api_guide/auth_overview.html
  - type: GraphQL
    url: graphql/constant-contact-graphql.md
- aid: constant-contact:constant-contact-events-api
  name: Constant Contact Events API
  description: Endpoints and methods used to create and manage events.
  humanURL: https://developer.constantcontact.com/
  baseURL: https://api.cc.email/v3
  tags:
  - Events
  properties:
  - type: OpenAPI
    url: openapi/constant-contact-events-api-openapi.yml
  - type: Documentation
    url: https://developer.constantcontact.com/
  - type: GettingStarted
    url: https://developer.constantcontact.com/api_guide/index.html
  - type: Authentication
    url: https://developer.constantcontact.com/api_guide/auth_overview.html
  - type: GraphQL
    url: graphql/constant-contact-graphql.md
- aid: constant-contact:constant-contact-landing-pages-reporting-api
  name: Constant Contact Landing Pages Reporting API
  description: Use landing pages reporting endpoints and methods to get reporting data about how a contact interacted with
    a campaign activity.
  humanURL: https://developer.constantcontact.com/
  baseURL: https://api.cc.email/v3
  tags:
  - Landing Pages Reporting
  properties:
  - type: OpenAPI
    url: openapi/constant-contact-landing-pages-reporting-api-openapi.yml
  - type: Documentation
    url: https://developer.constantcontact.com/
  - type: GettingStarted
    url: https://developer.constantcontact.com/api_guide/index.html
  - type: Authentication
    url: https://developer.constantcontact.com/api_guide/auth_overview.html
  - type: GraphQL
    url: graphql/constant-contact-graphql.md
- aid: constant-contact:constant-contact-segments-api
  name: Constant Contact Segments API
  description: Use segments to target a subset of your contacts that are most likely to engage with a particular campaign.
  humanURL: https://developer.constantcontact.com/
  baseURL: https://api.cc.email/v3
  tags:
  - Segments
  properties:
  - type: OpenAPI
    url: openapi/constant-contact-segments-api-openapi.yml
  - type: Documentation
    url: https://developer.constantcontact.com/
  - type: GettingStarted
    url: https://developer.constantcontact.com/api_guide/index.html
  - type: Authentication
    url: https://developer.constantcontact.com/api_guide/auth_overview.html
  - type: GraphQL
    url: graphql/constant-contact-graphql.md
- aid: constant-contact:constant-contact-sms-reporting-api
  name: Constant Contact SMS Reporting API
  description: Use SMS reporting endpoints and methods to get reporting data about SMS campaigns.
  humanURL: https://developer.constantcontact.com/
  baseURL: https://api.cc.email/v3
  tags:
  - SMS Reporting
  properties:
  - type: OpenAPI
    url: openapi/constant-contact-sms-reporting-api-openapi.yml
  - type: Documentation
    url: https://developer.constantcontact.com/
  - type: GettingStarted
    url: https://developer.constantcontact.com/api_guide/index.html
  - type: Authentication
    url: https://developer.constantcontact.com/api_guide/auth_overview.html
  - type: GraphQL
    url: graphql/constant-contact-graphql.md
- aid: constant-contact:constant-contact-technology-partners-api
  name: Constant Contact Technology Partners API
  description: Use partner endpoints to manage client Constant Contact accounts under your partner account.
  humanURL: https://developer.constantcontact.com/
  baseURL: https://api.cc.email/v3
  tags:
  - Technology Partners
  properties:
  - type: OpenAPI
    url: openapi/constant-contact-technology-partners-api-openapi.yml
  - type: Documentation
    url: https://developer.constantcontact.com/
  - type: GettingStarted
    url: https://developer.constantcontact.com/api_guide/index.html
  - type: Authentication
    url: https://developer.constantcontact.com/api_guide/auth_overview.html
  - type: GraphQL
    url: graphql/constant-contact-graphql.md
- aid: constant-contact:constant-contact-technology-partners-webhooks-api
  name: Constant Contact Technology Partners Webhooks API
  description: Use partner webhooks to subscribe to billing event notifications from Constant Contact.
  humanURL: https://developer.constantcontact.com/
  baseURL: https://api.cc.email/v3
  tags:
  - Technology Partners Webhooks
  properties:
  - type: OpenAPI
    url: openapi/constant-contact-technology-partners-webhooks-api-openapi.yml
  - type: Documentation
    url: https://developer.constantcontact.com/
  - type: GettingStarted
    url: https://developer.constantcontact.com/api_guide/index.html
  - type: Authentication
    url: https://developer.constantcontact.com/api_guide/auth_overview.html
  - type: GraphQL
    url: graphql/constant-contact-graphql.md
common:
- type: AgenticAccess
  url: agentic-access/constant-contact-agentic-access.yml
- type: DomainSecurity
  url: security/constant-contact-domain-security.yml
- type: Authentication
  url: authentication/constant-contact-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/constant-contact
- type: Website
  url: https://www.constantcontact.com/
- type: Portal
  url: https://developer.constantcontact.com/
- type: GettingStarted
  url: https://developer.constantcontact.com/api_guide/index.html
- type: Authentication
  url: https://developer.constantcontact.com/api_guide/auth_overview.html
- type: APIReference
  url: https://developer.constantcontact.com/api_reference/index.html
- type: OpenAPI
  url: https://api.cc.email/v3/swagger.yaml
- type: StatusPage
  url: https://status.constantcontact.com/
- type: Support
  url: https://www.constantcontact.com/help
- type: Community
  url: https://community.constantcontact.com/
- type: Blog
  url: https://blogs.constantcontact.com/
- type: GitHubOrganization
  url: https://github.com/constantcontact
- type: PrivacyPolicy
  url: https://www.constantcontact.com/legal/privacy-statement
- type: TermsOfService
  url: https://www.constantcontact.com/legal/terms-of-use
- type: JSONLD
  url: json-ld/constant-contact-context.jsonld
- type: JSONSchema
  url: json-schema/constant-contact-contact-schema.json
- type: JSONSchema
  url: json-schema/constant-contact-campaign-schema.json
- type: Spectral
  url: rules/constant-contact-rules.yml
- type: Features
  data:
  - 'Lite: $12/mo for 500 contacts (jumps to $50/mo at 1K)'
  - 'Standard: mid-tier with A/B testing, segmentation'
  - 'Premium: $80/mo at 500 contacts with 24x email ratio'
  - 'Email overages: $0.002 per additional email'
  - REST API v3 at api.cc.email/v3
  - 'API limit: 4 req/sec, 10K req/day per app'
  - OAuth 2.0
  - Webhooks for contact and campaign events
  - Contacts, lists, segments, custom fields
  - Email Templates and Drag-and-Drop editor
  - Marketing Automation (Standard+)
  - Surveys, landing pages, social media posts
  - Reporting on opens, clicks, bounces, conversions
  - E-commerce integrations (Shopify, WooCommerce, etc.)
  - Event marketing and registration
  - List building tools and lead capture
  sources:
  - https://www.constantcontact.com/pricing
  updated: '2026-05-04'
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com