SharpSpring API
SharpSpring exposes a self-serve JSON-RPC API at api.sharpspring.com/pubapi/v1.2 with broad CRUD over leads, contacts, campaigns, and workflows; customers generate an Account ID and Secret Key in Settings. There are no native webhooks, only workflow PostBacks, and rate limits are undocumented.
Frequently asked questions
SharpSpring scores D+ on the API Report Card. SharpSpring exposes a self-serve JSON-RPC API at api.sharpspring.com/pubapi/v1.2 with broad CRUD over leads, contacts, campaigns, and workflows; customers generate an Account ID and Secret Key in Settings. There are no native webhooks, only workflow PostBacks, and rate limits are undocumented.
Without a usable official API, teams fall back on manual exports, file drops, or one-off vendor integrations. The other option is an unofficial API layer like Supergood that automates the authenticated web app directly.
SharpSpring, now officially branded 'Constant Contact Lead Gen & CRM' since the March 15, 2023 rebrand following Constant Contact's $240M acquisition in 2021, is a cloud-based, all-in-one marketing automation, email marketing, and CRM platform.
Vertical: Marketing automation / email / CRM (horizontal SaaS, not industry-specific). Agencies and in-house marketers build email campaigns and automated nurture workflows in a visual builder, capture leads via embedded forms and landing pages, score leads based on web behavior and engagement, and hand qualified leads to the bundled CRM where sales reps work opportunities through pipelines.
SharpSpring is a well-known mid-tier marketing automation brand with a long history (founded as a public company that IPO'd in 2014, acquired for $240M in 2021), 4.5-4.6/5 average across G2/Capterra/GetApp/Software Advice with hundreds of reviews, and a documented base of ~2,000 agencies and ~10,000 businesses.
Yes, for any agency or in-house marketer running lead generation and nurture on SharpSpring, it is the system of record for the full marketing + lightweight CRM dataset: every lead and contact with all custom fields, the complete 'Life of the Lead' behavioral timeline (page views, email opens/clicks, form submissions, campaign touches), all opportunities and accounts in the bundled CRM pipeline, every email send and engagement event, all automation workflow entry/exit events, lead scores, list memberships, form submissions, landing page conversions, campaign attribution, and PostBack event history.
SharpSpring was founded in 2011/2012 as a marketing automation platform built specifically for agencies; the parent company SharpSpring, Inc. IPO'd on NASDAQ (ticker SHSP) in 2014.
No native webhooks, event-driven integrations require configuring 'PostBacks' inside workflows, which is less flexible and harder to manage at scale than a true webhook subscription model. API is JSON-RPC rather than REST or GraphQL, modern HTTP clients, OpenAPI tooling, and SDK generators don't work cleanly against it. Full sourced list under Sources below.
Common alternatives include HubSpot, ActiveCampaign, Marketo (Adobe), Mailchimp (Intuit), Pardot / Salesforce Marketing Cloud Account Engagement, Klaviyo. Graded alternatives appear under "More from the report card" below.
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.