"Understanding OAuth 2.0 Protocol" matching MCP servers:

Enables AI assistants to query Bullhorn CRM data using natural language through direct REST API access with OAuth 2.0 authentication.

A Model Context Protocol (MCP) server that connects LLMs to the Zendesk Support & Help Center APIs — with per-user OAuth 2.1 PKCE authentication and fine-grained tool visibility controls.

Enables AI agents to read and create customers, jobs, estimates, invoices, calendar tasks, equipment, technicians, and reference data through the documented Service Fusion REST API, handling OAuth 2.0 and pagination automatically.

Enables AI-powered ticket analysis and comprehensive Zendesk API integration via the Model Context Protocol, supporting both API token (CLI) and OAuth 2.1 (web) authentication modes.

A complete MCP server over the Bitrix24 REST API, enabling CRM, tasks, chats, files, calendar, HR, smart processes, mail, telephony, business processes, and events through 30 tools and ~290 actions. Supports incoming webhook or OAuth 2.0 authentication and works over stdio or Streamable HTTP.

Connect an AI agent to your OKRs. FlowyTeam exposes 33 MCP tools covering OKR objectives, key results, KPI indicators and performance cycles, alongside tasks, projects, HR, attendance, tickets and CRM — one hosted connection for the whole workspace. Supports Claude Desktop, Claude web and mobile, ChatGPT (OAuth 2.0 + PKCE), and Claude Code / n8n (Bearer token). Tools respect the caller's existing

Enables interaction with Salesforce through the MCP protocol, handling OAuth authentication and secure token storage for users.

Zendesk MCP Pack for managing tickets, users, and organizations via OAuth.

A Model Context Protocol server that connects Claude to Acumatica ERP, enabling AI-driven data access with per-user OAuth, role-based permissions, and automatic sensitive field redaction.

MCP server for RD Station Marketing enabling AI agents to manage contacts, conversion events, webhooks, and account info via OAuth 2.0.

Provides read-only access to Salesforce orgs via MCP, enabling SOQL queries, sObject descriptions, and object listing using OAuth 2.0 Client Credentials.

Enables AI agents to manage Lever.co candidates and job requisitions, and send themed emails via Gmail API with OAuth 2.0.

Enables AI clients and Claude Desktop to interact with the Zoho CRM REST API for record CRUD, metadata discovery, workflows, and bulk operations via OAuth 2.0 authentication.

Enables Claude AI to securely query live SAP inventory data through Salesforce by invoking typed Apex methods via MCP, using OAuth 2.0 JWT Bearer flow for authentication.

Enables Agentforce agents to retrieve order status and loyalty points from external systems via OAuth 2.0 secured MCP endpoints hosted on AWS.

An MCP server that provides OIDC-protected access to QA MGT OpenAPI data, enabling tools for trainees, orders, products, customers, and recruitment operations.

Model Context Protocol server for Kylas CRM lead operations, enabling lead creation, search/filter, and lookup of users, products, and pipelines.

Model Context Protocol server for the Apideck Unified API. Connect any MCP-compatible agent framework to 100+ accounting systems, HRIS platforms, file storage providers, and more through one integration. More information https://www.apideck.com/mcp-server

MCP server for the bexio API, enabling interaction with contacts, sales, accounting, projects, and more through 35 tools. Supports both PAT and OAuth authentication with read-only mode and tool group filtering.

Enables AI agents to interact with Odoo ERP to perform sales tasks such as searching clients and products, and creating and confirming quotations via the MCP protocol.