Keap API
Keap runs a self-serve developer program at developer.infusionsoft.com with REST v1 and v2 APIs plus a legacy XML-RPC surface. OAuth 2.0 apps and personal access tokens are self-provisioned, with sandbox accounts. HMAC-signed REST Hooks cover contact, order, and subscription events.
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Keap scores B+ on the API Report Card. Keap runs a self-serve developer program at developer.infusionsoft.com with REST v1 and v2 APIs plus a legacy XML-RPC surface. OAuth 2.0 apps and personal access tokens are self-provisioned, with sandbox accounts. HMAC-signed REST Hooks cover contact, order, and subscription events.
Keap has a workable official integration path. Most engineering teams can build against it directly. Solid API with minor gaps
Keap is an all-in-one CRM, sales pipeline, marketing automation, payments, and appointment-scheduling platform built for small businesses and solopreneurs.
Vertical: misc (SMB CRM + marketing automation, closest Supergood vertical bucket since Keap spans many SMB verticals rather than living inside any one of the listed verticals). Centralized contact / lead / customer database with tags, custom fields, and segmentation.
Medium-high within the SMB marketing automation niche, low against horizontal CRM benchmarks.
Contacts (with custom fields, tags, lifecycle stage), companies, and contact-company relationships. Email and SMS engagement events (sent, delivered, opened, clicked, bounced, opted-out, complained).
Founded in 2001; ~25 years old as of 2026, making Keap one of the oldest SMB marketing-automation platforms still operating under its original product DNA.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.