Act-On

Act-On Software is a cloud-based marketing automation platform used by B2B and B2C marketing teams for email marketing, lead generation and nurturing, landing pages and forms, website visitor tracking, lead scoring and segmentation, custom data, and campaign reporting. Act-On publishes four OpenAPI 3.1 documents through its developer portal covering 158 operations on one gateway host (https://api.actonsoftware.com, with an EU region at api-eu.actonsoftware.com): the legacy form-encoded /api/1 surface, the newer JSON Act-On Contacts layer at /ucl/v2, a transactional email endpoint at /ete/v1, and a separately versioned Custom Objects Service at /custom-objects/v1 that is in request-only beta. Authentication is OAuth 2.0 with password, refresh_token and authorization_code grants and no scopes. Act-On also ships a signed outgoing-webhook event surface with nineteen documented event types. Added to the API Evangelist network from a Norwest Venture Partners portfolio lead and enriched from Act-On's public developer surface.

Act-On publishes 2 APIs on the APIs.io network: REST API and Custom Objects Service. Tagged areas include Company, Marketing, Marketing Automation, Email Marketing, and Email.

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

Act-On’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, changelog, and 23 more developer resources.

🌐 Visit website 📡 Source on GitHub

60.2/100 strong ▲ 40.6 Agent 55/100 agent ready Full breakdown ↓
scored 2026-08-17 · rubric v0.11.0

AccessPaid

3 APIs 1 MCP Servers

CompanyMarketingMarketing AutomationEmail MarketingEmailMarketing TechnologyLead GenerationCampaign ManagementCustomer DataWebhooksAPI

Kin Score

Kin Score How this is scored →
scored 2026-08-17 · rubric v0.11.0

Composite quality — 60.2/100 · strong

Contract Quality 15.2 / 25

Developer Ergonomics 13.5 / 20

Commercial Clarity 13.7 / 20

Operational Transparency 9.2 / 13

Governance 1.4 / 12

Discoverability 7.2 / 10

Agent readiness — 55/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

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 4 / 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/act-on: 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 3

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.

Scopes 1

OAuth scopes governing access to this provider's APIs.

Act On Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Sandbox

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

MCPServer

MCPServer

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Conformance

Lifecycle

DataModel

Webhooks

Access & Security 4

Authentication, authorization, and security posture

Authentication

TrustCenter

Compliance

DomainSecurity

Operate 6

Status, limits, changes, and where to get help

HelpCenter

Support

StatusPage

ChangeLog

RateLimits

ChangeLog

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

Source (apis.yml)

aid: act-on
accessModel:
  pricing: paid
  onboarding: sales-assisted
  trial: false
  try_now: false
  public: false
  label: Paid plan plus a free developer sandbox by request
  confidence: high
  source:
  - plans
  - sandbox
  - authentication
  generated: '2026-08-13'
  method: searched
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/act-on.png
name: Act-On
description: 'Act-On Software is a cloud-based marketing automation platform used by B2B and B2C marketing teams for email
  marketing, lead generation and nurturing, landing pages and forms, website visitor tracking, lead scoring and segmentation,
  custom data, and campaign reporting. Act-On publishes four OpenAPI 3.1 documents through its developer portal covering 158
  operations on one gateway host (https://api.actonsoftware.com, with an EU region at api-eu.actonsoftware.com): the legacy
  form-encoded /api/1 surface, the newer JSON Act-On Contacts layer at /ucl/v2, a transactional email endpoint at /ete/v1,
  and a separately versioned Custom Objects Service at /custom-objects/v1 that is in request-only beta. Authentication is
  OAuth 2.0 with password, refresh_token and authorization_code grants and no scopes. Act-On also ships a signed outgoing-webhook
  event surface with nineteen documented event types. Added to the API Evangelist network from a Norwest Venture Partners
  portfolio lead and enriched from Act-On''s public developer surface.'
url: https://raw.githubusercontent.com/api-evangelist/act-on/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- norwest-venture-partners
x-tier: active
x-tier-reason: public-oauth2-rest-api
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-08-13'
tags:
- Company
- Marketing
- Marketing Automation
- Email Marketing
- Email
- Marketing Technology
- Lead Generation
- Campaign Management
- Customer Data
- Webhooks
- API
apis:
- name: Act-On REST API
  description: OAuth 2.0 REST API for Act-On marketing automation — contacts and lists, segments, email messages and campaigns,
    media and creative assets, landing pages and forms, subscriptions, imports, custom events, and reporting. Covers the /api/1,
    /ucl/v2 and /ete/v1 path generations, 134 operations in total.
  humanURL: https://developer.act-on.com/reference/api-overview
  baseURL: https://api.actonsoftware.com
  properties:
  - type: OpenAPI
    url: openapi/act-on-rest-api-openapi.yml
  - type: OpenAPI
    url: openapi/act-on-raw-body-api-openapi.yml
  - type: OpenAPI
    url: openapi/act-on-oauth-openapi.yml
  - type: Documentation
    url: https://developer.act-on.com
  - type: APIReference
    url: https://developer.act-on.com/reference/api-overview
  - type: Authentication
    url: authentication/act-on-authentication.yml
  - type: RateLimits
    url: rate-limits/act-on-rate-limits.yml
  - type: ErrorCatalog
    url: errors/act-on-problem-types.yml
  - type: Conventions
    url: conventions/act-on-conventions.yml
  - type: DataModel
    url: data-model/act-on-data-model.yml
  - type: Overlay
    url: overlays/act-on-rest-api-overlay.yaml
  - type: Overlay
    url: overlays/act-on-raw-body-api-overlay.yaml
  - type: Overlay
    url: overlays/act-on-oauth-overlay.yaml
  - type: LLMsTxt
    url: llms/act-on-llms.txt
- name: Act-On Custom Objects Service
  description: Separately versioned (3.4.3) Custom Data service for defining custom object schemas and fields, creating datasets,
    validating and ingesting CSV/JSON data, polling ingest jobs, and querying custom data joined against Act-On Contacts with
    offset or cursor pagination. Act-On states these endpoints are in BETA and available on request only.
  humanURL: https://developer.act-on.com/reference/overview
  baseURL: https://api.actonsoftware.com/custom-objects
  properties:
  - type: OpenAPI
    url: openapi/act-on-custom-objects-service-openapi.yml
  - type: Documentation
    url: https://developer.act-on.com/reference/overview
  - type: Authentication
    url: authentication/act-on-authentication.yml
  - type: Overlay
    url: overlays/act-on-custom-objects-service-overlay.yaml
- name: Act-On Outgoing Webhooks
  description: Outgoing webhook event surface — nineteen documented event types across contacts, consent, deliverability,
    lead scoring, subscriptions, automated programs, messaging, forms and CRM connections. Payloads are JSON, POSTed to a
    customer-configured endpoint and signed with HMAC SHA-256 using a per-endpoint secret. Endpoints are configured in the
    Act-On UI, not through the REST API.
  humanURL: https://connect.act-on.com/hc/en-us/sections/20585868662935-Outgoing-Incoming-Webhooks
  properties:
  - type: Webhooks
    url: asyncapi/act-on-webhooks.yml
  - type: Documentation
    url: https://connect.act-on.com/hc/en-us/articles/20031106799383-Outgoing-Webhook-Event-Types
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://act-on.com
- type: DeveloperPortal
  url: https://developer.act-on.com
- type: Documentation
  url: https://developer.act-on.com
- type: APIReference
  url: https://developer.act-on.com/reference/api-overview
- type: GettingStarted
  url: https://developer.act-on.com/reference/request-a-developer-account
- type: HelpCenter
  url: https://connect.act-on.com/hc/en-us
- type: Support
  url: https://act-on.com/product/services/support-packages/
- type: Blog
  url: https://act-on.com/learn/blog/
- type: Pricing
  url: https://act-on.com/pricing/
- type: TermsOfService
  url: https://act-on.com/terms-of-service/
- type: PrivacyPolicy
  url: https://act-on.com/privacy-policy/
- type: StatusPage
  url: https://status.act-on.com
- type: ChangeLog
  url: https://connect.act-on.com/hc/en-us/categories/13386837131927-What-s-New
- type: LLMsTxt
  url: llms/act-on-llms.txt
- type: Authentication
  url: authentication/act-on-authentication.yml
- type: Conventions
  url: conventions/act-on-conventions.yml
- type: ErrorCatalog
  url: errors/act-on-problem-types.yml
- type: Conformance
  url: conformance/act-on-conformance.yml
- type: Lifecycle
  url: lifecycle/act-on-lifecycle.yml
- type: DataModel
  url: data-model/act-on-data-model.yml
- type: RateLimits
  url: rate-limits/act-on-rate-limits.yml
- type: Plans
  url: plans/act-on-plans-pricing.yml
- type: Sandbox
  url: sandbox/act-on-sandbox.yml
- type: ChangeLog
  url: changelog/act-on-changelog.yml
- type: Webhooks
  url: asyncapi/act-on-webhooks.yml
- type: AgentSkill
  url: skills/_index.yml
- type: MCPServer
  url: mcp/act-on-mcp.yml
- type: TrustCenter
  url: security/act-on-trust-center.yml
- type: Compliance
  url: security/act-on-trust-center.yml
- type: DomainSecurity
  url: security/act-on-domain-security.yml
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 26
  pass: local-v1

Act-On

Kin Score

APIs 3

Act-On REST API

Act-On Custom Objects Service

Act-On Outgoing Webhooks

Open Collections 4

Custom Objects Service

oauth

act-on-api-raw-body

act-on-api-1

MCP Servers 1

act-on-mcp.yml

Pricing Plans 1

Act On Plans Pricing

Rate Limits 1

Act On Rate Limits

Event Specifications 1

Act On Webhooks

Security Posture 3

Act On Authentication

Act On Domain Security

Act On Trust Center