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Top 10 Business & CRM APIs

Ranked by popularity score. A comparison view generated from structured frontmatter (pricing, auth, docs links).

RankAPIFree tierStarting fromAuthDetails
1
Salesforce API
Access Salesforce CRM data including accounts, contacts, leads, opportunities, and custom objects through REST, SOAP, and Bulk APIs.
No$25/user/month (Starter Suite)oauth2View
2
Shopify API
Build custom e-commerce experiences, manage products, orders, customers, and integrate with Shopify's commerce platform through Admin and Storefront APIs.
YesFreeoauth2View
3
Jira API
Integrate with Jira's project management and issue tracking platform to manage issues, projects, sprints, and automate development workflows.
YesFreeoauth2View
4
HubSpot API
Integrate with HubSpot's CRM, marketing, sales, and service platform to manage contacts, deals, emails, and automate customer workflows.
YesFreeoauth2View
5
Trello API
Manage Trello boards, lists, and cards programmatically. Automate workflows, sync data, create custom integrations, and build tools on top of Trello's flexible kanban system.
YesFree (10 boards/workspace)oauth2View
6
Asana API
Manage Asana tasks, projects, teams, and portfolios programmatically. Create custom workflows, sync data, automate task management, and build integrations with Asana's REST API.
YesFree (unlimited tasks)oauth2View
7
Zendesk API
Integrate Zendesk's customer service platform. Manage tickets, users, organizations, automations, and build custom support solutions with comprehensive REST and Events APIs.
YesFree (trial)oauth2View
8
QuickBooks API
Integrate QuickBooks accounting software into your applications. Manage invoices, expenses, customers, vendors, payments, and financial data programmatically.
YesFree (sandbox)oauth2View
9
Confluence API
Access and manage Confluence spaces, pages, and content programmatically. Build integrations with Atlassian's team collaboration and documentation platform.
YesFree (10 users)oauth2View
10
Monday.com API
Access monday.com's Work OS platform via GraphQL API. Manage boards, items, columns, groups, automations, and build custom workflows for team collaboration.
YesFree (up to 2 users)bearerView