aid: sharpspring
name: SharpSpring
description: 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.
url: https://raw.githubusercontent.com/api-evangelist/sharpspring/refs/heads/main/apis.yml
image: https://sharpspring.com/wp-content/uploads/2021/10/SharpSpring-From-CTCT-Logo-RGB-Color-1200.png
x-type: company
x-source: harvest:marketing-integration-graph
x-tier: stub
x-tier-reason: harvest
specificationVersion: '0.20'
created: '2026-08-12'
modified: '2026-08-12'
tags:
- Company
- Marketing
- Marketing Automation
- CRM
- Email Marketing
- Sales
- Leads
- Campaigns
- Automation
- SaaS
apis:
- aid: sharpspring:open-api
  name: SharpSpring Open API
  description: 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. Version v1 resolves
    timestamps against the Company Profile time zone; v1.2 handles all timestamps in UTC. Credentials
    are an account ID and secret key passed either as query-string parameters or as the X-Account-Id
    header plus an Authorization bearer token. Documented limits are 50,000 requests per day, 10 queries
    per second, and 500 queries per request.
  humanURL: https://knowledgebase.constantcontact.com/lead-gen-crm/articles/KnowledgeBase/50374-Understanding-Lead-Gen--CRM-Open-API-Overview?lang=en_US
  baseURL: https://api.sharpspring.com/pubapi/v1.2/
  tags:
  - Marketing Automation
  - CRM
  - Leads
  - JSON-RPC
  properties:
  - type: Documentation
    url: https://knowledgebase.constantcontact.com/lead-gen-crm/articles/KnowledgeBase/50374-Understanding-Lead-Gen--CRM-Open-API-Overview?lang=en_US
  - type: APIReference
    url: https://knowledgebase.constantcontact.com/lead-gen-crm/articles/KnowledgeBase/50564-Understanding-Lead-Gen--CRM-Open-API-Methods?lang=en_US
  - type: GettingStarted
    url: https://knowledgebase.constantcontact.com/lead-gen-crm/articles/KnowledgeBase/50404-Understanding-Lead-Gen-CRM-Open-API-Example-Code?lang=en_US
  - type: Authentication
    url: authentication/sharpspring-authentication.yml
  - type: ErrorCatalog
    url: errors/sharpspring-problem-types.yml
  - type: RateLimits
    url: rate-limits/sharpspring-rate-limits.yml
  - type: Conventions
    url: conventions/sharpspring-conventions.yml
  - type: DataModel
    url: data-model/sharpspring-data-model.yml
  - type: Webhooks
    url: asyncapi/sharpspring-postbacks-webhooks.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/sharpspring-domain-security.yml
- type: Website
  url: https://sharpspring.com/
- type: DeveloperPortal
  url: https://knowledgebase.constantcontact.com/lead-gen-crm/articles/KnowledgeBase/50374-Understanding-Lead-Gen--CRM-Open-API-Overview?lang=en_US
- type: Documentation
  url: https://knowledgebase.constantcontact.com/lead-gen-crm/articles/KnowledgeBase/50374-Understanding-Lead-Gen--CRM-Open-API-Overview?lang=en_US
- type: APIReference
  url: https://knowledgebase.constantcontact.com/lead-gen-crm/articles/KnowledgeBase/50564-Understanding-Lead-Gen--CRM-Open-API-Methods?lang=en_US
- type: GettingStarted
  url: https://knowledgebase.constantcontact.com/lead-gen-crm/articles/KnowledgeBase/50404-Understanding-Lead-Gen-CRM-Open-API-Example-Code?lang=en_US
- type: Support
  url: https://sharpspring.com/customer-support/
- type: HelpCenter
  url: https://knowledgebase.constantcontact.com/lead-gen-crm?lang=en_US
- type: Blog
  url: https://www.constantcontact.com/blog/
- type: GitHubOrganization
  url: https://github.com/sharpspring
- type: StatusPage
  url: https://status.sharpspring.com/
- type: Pricing
  url: https://sharpspring.com/agency-pricing/
- type: SignUp
  url: https://www.constantcontact.com/signup/lead-gen-crm/demo
- type: Login
  url: https://api.sharpspring.com/
- type: TermsOfService
  url: https://www.constantcontact.com/legal/terms
- type: PrivacyPolicy
  url: https://www.constantcontact.com/legal/privacy-notice
- type: Security
  url: https://www.constantcontact.com/disclosure
- type: Integrations
  url: https://sharpspring.com/app-marketplace/
- type: WellKnown
  url: well-known/sharpspring-well-known.yml
- type: SecurityTxt
  url: well-known/sharpspring-security.txt
- type: LLMsTxt
  url: llms/sharpspring-llms.txt
- type: Authentication
  url: authentication/sharpspring-authentication.yml
- type: Conventions
  url: conventions/sharpspring-conventions.yml
- type: ErrorCatalog
  url: errors/sharpspring-problem-types.yml
- type: RateLimits
  url: rate-limits/sharpspring-rate-limits.yml
- type: Plans
  url: plans/sharpspring-plans-pricing.yml
- type: Lifecycle
  url: lifecycle/sharpspring-lifecycle.yml
- type: Conformance
  url: conformance/sharpspring-conformance.yml
- type: DataModel
  url: data-model/sharpspring-data-model.yml
- type: Packages
  url: packages/sharpspring-packages.yml
- type: Webhooks
  url: asyncapi/sharpspring-postbacks-webhooks.yml
- type: VulnerabilityDisclosure
  url: security/sharpspring-vulnerability-disclosure.yml
x-vouched-by:
- Chili Piper
- Moosend
x-vouch-count: 2
x-enrichment:
  date: '2026-08-12'
  status: enriched
  artifacts_added: 15
  pass: local-v1