Marketing software with a public API
Every tool TMB tracks that publishes a REST API. Hook it into your warehouse, dashboards, scheduled jobs, or agent stack. 8 publish an OpenAPI spec. Most common auth: unknown (17 tools).
What to look for in a marketing API
Three things separate a usable API from a frustrating one. An OpenAPI / Swagger spec means you can auto-generate typed clients. Official SDKs save auth boilerplate. Webhooks mean you can react to events instead of polling.
Each card shows these signals at a glance. Click into a tool to see pricing per tier, rate limits, and a quickstart snippet.
APIs with an OpenAPI spec
8 toolsThese publish a machine-readable spec. Drop the URL into Postman, generate a typed Node / Python / Go client, and skip the docs-page wrangling.
Leadpages
Landing Page Builder
Drag-and-drop landing page builder with 200+ templates and strong conversion optimization tools
Builderall
All-in-One Marketing
All-in-one marketing platform with 25+ tools including website builder, email marketing, and course creation
LanderLab
Landing Page Builder
AI-powered landing page builder specialized for performance marketing with proven templates and native integrations
Rankability
Content Optimization
AI-powered SEO tool for content optimization and AI search tracking built for agencies.
Mailchimp
Email Marketing
Popular email marketing platform that has become overpriced with declining value for most users
GoHighLevel
All-in-One Marketing
All-in-one CRM and marketing platform designed for agencies. Replaces multiple tools but has a steep learning curve.
Flodesk
Email Marketing
Design-focused email marketing platform with beautiful templates and sales funnels for creators
Instapage
Landing Page Builder
Drag-and-drop landing page builder with A/B testing and personalization for marketers
Other APIs
52 toolsPublic API documented, but no OpenAPI spec detected. You write the wrappers, but the API is still there.
Ahrefs
SEO Software
Comprehensive SEO platform with powerful backlink analysis and keyword research tools
DataForSEO
SEO Software
API-first SEO data platform for developers building SEO tools and software solutions
Klaviyo
Ecommerce Marketing
AI-powered marketing automation platform for ecommerce businesses with unified customer data and omnichannel campaigns
Omnisend
Ecommerce Marketing
Ecommerce-focused email and SMS marketing platform with powerful automation and 160+ integrations
ActiveCampaign
Email Marketing
AI-powered email marketing and automation platform for businesses serious about personalized campaigns
Clickfunnels
All-in-One Marketing
All-in-one marketing platform for building sales funnels, hosting courses, and managing customers
Frase
Content Optimization
AI-powered SEO content platform with research, optimization, and AI search visibility tracking
SE Ranking
SEO Software
Complete SEO platform with AI visibility tracking, rank monitoring, and competitive research tools.
Screaming Frog
SEO Software
Desktop SEO crawler for technical audits with unlimited crawling for $259/year
Zoho Campaigns
Email Marketing
Email marketing platform with SMS and deep Zoho ecosystem integration for business users
Drip
Ecommerce Marketing
Email marketing automation platform built for ecommerce brands with advanced segmentation and workflows.
Ghost
Newsletter Platform
Publishing platform with built-in newsletter and membership monetization. No platform fees on revenue.
Kit
Email Marketing
Creator-focused email marketing platform with powerful automations and integrated monetization tools
LowFruits
SEO Software
SERP-focused keyword research tool that analyzes competition weaknesses beyond traditional KD scores
AWeber
Email Marketing
Established email marketing platform with 27 years of experience, AI features, and reliable fundamentals
Buttondown
Newsletter Platform
Minimal newsletter platform with markdown support and privacy-first approach for content creators
GetResponse
Email Marketing
AI-powered email marketing platform with automation, landing pages, and webinars starting at $19/month
HubSpot
All-in-One Marketing
All-in-one CRM and marketing platform with generous free tools but steep paid plan pricing jumps
Semrush
SEO Software
Complete SEO platform with AI search tracking, keyword research, competitor analysis, and content optimization tools.
SimilarWeb
SEO Software
Digital market intelligence platform for traffic analysis and competitive research.
SpyFu
SEO Software
Competitive intelligence tool for Google Ads and SEO research with 18+ years of historical data
Unbounce
Landing Page Builder
Drag-and-drop landing page builder with A/B testing and AI optimization for marketers and agencies
beehiiv
Email Marketing
All-in-one newsletter platform with built-in website builder and monetization tools for creators
Benchmark Email
Email Marketing
Simple email builder with AI tools but no automation or A/B testing
Mangools
SEO Software
User-friendly SEO suite with excellent keyword research tools and competitive pricing for agencies
SurferSEO
Content Optimization
AI-powered SEO platform for content optimization across Google and AI search engines
AnswerThePublic
SEO Software
Visual keyword research tool that maps out questions people actually search for online
Botify
SEO Software
Enterprise SEO platform with AI search optimization and custom pricing for large-scale sites
Brevo
Email Marketing
All-in-one email marketing platform with SMS, automation, and AI features at competitive prices
Campaign Monitor
Email Marketing
Elegant email marketing platform with powerful automation and beautiful templates for growing businesses
Constant Contact
Email Marketing
Established email marketing platform with simple tools but outdated features at $12-80/month
Keap
All-in-One Marketing
All-in-one CRM and marketing automation platform for small businesses ready to scale operations
MailerLite
Email Marketing
Affordable email marketing with surprisingly powerful features and stellar support
Moosend
Email Marketing
Email marketing platform with powerful automation, landing pages, and forms at budget-friendly pricing
Moz Pro
SEO Software
Veteran SEO platform with 20+ years of experience and comprehensive toolkit for rankings, traffic, and optimization
Sender
Email Marketing
Affordable email marketing platform with generous free plan and multichannel automation
Systeme.io
All-in-One Marketing
Complete marketing platform with sales funnels, email marketing, courses, and more at budget-friendly prices
Thinkific
Online Course Platform
Course platform with drag-and-drop builder, communities, and commerce tools for educators and businesses
Clearscope
Content Optimization
SEO and AI content optimization platform for content teams focused on search visibility
Customer.io
Email Marketing
Advanced customer engagement platform with AI agents, starting at $100/month for data-driven teams
EmailOctopus
Email Marketing
Budget-friendly email marketing platform with a generous free plan and simple automation for small businesses.
Kajabi
All-in-One Marketing
All-in-one platform for course creators, coaches, and experts to build, market, and sell knowledge products
Kartra
All-in-One Marketing
True all-in-one marketing platform with advanced funnels, email automation, and membership hosting
Landingi
Landing Page Builder
Landing page builder with AI assistance, A/B testing, and 170+ integrations for marketers
LearnWorlds
Online Course Platform
AI-powered course platform with interactive video tools and white-label branding at premium prices
Loops
Email Marketing
API-first email platform designed specifically for SaaS teams and product-focused businesses
Mailjet
Email Marketing
Email platform combining marketing campaigns with developer APIs and volume-based pricing
Perspective Funnels
Landing Page Builder
Mobile-first funnel builder with interactive features and high conversion templates for modern marketers.
Selzy
Email Marketing
Budget email marketing with flexible pricing and strong support, but basic automation features
Seobility
SEO Software
User-friendly SEO platform with website auditing, keyword tracking, and backlink analysis for all skill levels.
Teachable
Online Course Platform
Course platform with AI tools, global payments, and mobile apps for serious creators scaling worldwide
Wishpond
All-in-One Marketing
All-in-one marketing platform with landing pages, email marketing, and lead generation tools
Prefer an MCP server?
If you're wiring tools into Claude / Cursor / Codex, an MCP server is usually less code than the REST API. The /mcp directory lists every tool that ships one.
See the MCP directory