How to Securely Connect Cursor to Arcade for MCP Tools
Blog post from Arcade
Arcade.dev is presented as a secure actions runtime for connecting Cursor to MCP-enabled services such as Slack, Jira, Linear, Gmail, and Microsoft Word without storing long-lived API keys in local configuration files. It uses an MCP Gateway, OAuth 2.1 and OIDC authentication, vaulted credentials, execution-time authorization based on the intersection of agent and user permissions, and centralized audit logs to reduce credential exposure and prompt-injection risks. The setup involves creating an Arcade account and Gateway, adding its URL to Cursor through a one-click option or the MCP configuration file, and completing browser-based OAuth authentication. The guide contrasts this approach with direct API-key integrations, which it characterizes as less secure, less auditable, and more prone to unreliable tool calls, while also describing sample workflows that create Linear issues from Slack alerts, generate Word briefings from Gmail, and draft Jira-based status reports. It additionally covers connection troubleshooting, the distinction between expired-session 401 errors and insufficient-scope 403 errors, self-hosting options, tool refresh behavior in Cursor, and usage-based pricing.
| Trend | Post Mentions | Total Month Mentions | Posts | Companies | MoM |
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