# SharpSpring

**Canonical:** https://apis.io/providers/sharpspring/  
**Website:** https://sharpspring.com/  
**APIs profiled:** 1

SharpSpring — now sold as Constant Contact Lead Gen & CRM after Constant Contact acquired the company in 2021 — is a marketing automation and CRM platform for small businesses and digital marketing agencies, covering email marketing, landing pages, forms, visual automation workflows, social management, campaign tracking, lead scoring and a built-in sales CRM. Its developer surface is the SharpSpring Open API, a JSON-RPC-style HTTPS POST endpoint at api.sharpspring.com/pubapi/ that exposes roughly 120 published methods over leads, accounts, opportunities, campaigns, deal stages, emails, email jobs, lists and list members, fields, folders, notes, products and tasks. Authentication is a static account ID plus secret key generated in the application; there is no OAuth, no scopes and no OpenAPI description. Event delivery is handled by workflow and form Postback URLs rather than a webhook subscription API.

## Kin Score — 51.7 / 100 (developing)

Scored 2026-08-17 under rubric 0.11.0. Trend: flat (+0.0 from 51.7).

| Facet | Score |
|---|---|
| Discoverability | 87.0 |
| Contract Quality | 51.6 |
| Governance | 12.5 |
| Operational Transparency | 71.1 |
| Developer Ergonomics | 52.2 |
| Commercial Clarity | 44.7 |

## Agent readiness — 40.1 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | yes |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | yes |
| Agent Card | no |
| Dry Run Mode | no |

## APIs (1)

- **SharpSpring Open API** — The SharpSpring (Constant Contact Lead Gen & CRM) Open API — a single HTTPS POST endpoint that accepts a JSON envelope of method, params and id, very similar to JSON-RPC. Versio...

## Security (3)

- **Sharpspring Authentication** — apiKey · 2 schemes
- **Sharpspring Domain Security** — TLSv1.3 · HSTS · DMARC
- **Sharpspring Vulnerability Disclosure** — Hackerone · security.txt · contact published

## Plans (1)

- **Sharpspring Plans Pricing**

## Tags

Company, Marketing, Marketing Automation, CRM, Email Marketing, Sales, Leads, Campaigns, Automation, SaaS

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/sharpspring/). Scores are computed from the provider's own public artifacts under a published rubric.