Best Authentication Software for Model Context Protocol (MCP)

Scalekit is the MCP gateway for AI agents. Developers and platform teams use it when an agent must call business tools as the user, not through a shared service account. One endpoint reaches 600+ connectors and 35,000+ tools, including Salesforce, Gmail, Slack, Notion, HubSpot, Jira, and GitHub. When the agent requests a tool, Scalekit finds that user's credentials, checks that the agent is allowed to call it, runs the call, and returns a clean response. Tokens stay in an AES-256 vault, isolated per tenant, and out of application code, logs, and the model prompt. Venu Madhav Kattagoni, Head of Engineering at Von, describes it this way: "Our agents act across Salesforce, Gong, Google Drive, and more, on behalf of every customer." Scalekit works with Anthropic, OpenAI, LangChain, Google ADK, Vercel AI, and Mastra. Managed cloud runs in the US (Los Angeles) or the EU (Frankfurt). EU data residency on Growth is a $99 a month add-on. Enterprise can run in a VPC or self-hosted, including air-gapped. Scalekit is SOC 2 Type II and ISO 27001 certified. A HIPAA BAA is available on Enterprise. The Free plan is $0 a month and includes 10,000 tool calls and 10,000 trigger events. Growth is $99 a month for 100,000 tool calls, then $0.50 per 1,000 calls. Enterprise pricing is custom, and includes SSO and SCIM for the Scalekit dashboard

Better Auth is a versatile authentication and authorization solution tailored for TypeScript, enabling developers to seamlessly integrate secure login functionalities into their applications and databases. It comes equipped with a comprehensive suite of authentication tools right from the start, offering features such as email and password login, session management, email verification, password resets, and compatibility with over 40 social login options like Google and GitHub, all requiring minimal coding effort. Designed to be compatible with a broad spectrum of contemporary frameworks, including Next.js, Nuxt, SvelteKit, Astro, and Express, it empowers teams to implement authentication irrespective of their chosen technology stack while ensuring robust TypeScript support and type safety. Furthermore, Better Auth boasts sophisticated features such as multi-factor authentication, management of multi-tenant organizations, and enterprise-level functionalities including SSO, SAML, and SCIM provisioning, making it an ideal fit for both straightforward applications and complex, large-scale systems. This flexibility allows developers to focus on building their core application features while relying on Better Auth to handle security concerns efficiently.

SignOps is a cloud-based API tailored for developers looking to incorporate push messaging and sign-in processes into their web and mobile applications. It allows developers to link devices to current user IDs, dispatch push notifications to users or specific topics across Android, iOS, and web platforms, as well as schedule messages, utilize templates, and track delivery metrics. Additionally, the service facilitates phone-based login verifications that include number matching and biometric checks, enables passkey sign-ins on a client's domain, offers TOTP authenticator codes along with backup options, and supports email one-time passwords. Integration with existing backends and identity providers is made seamless with REST endpoints, server SDKs, mobile and web SDKs, a collaborative team dashboard, and signed webhooks. SignOps is specifically crafted for developers and teams focused on creating applications that require effective notification systems, passwordless authentication, or enhanced sign-in security measures. With its multifaceted features, SignOps aims to streamline the user experience while bolstering application security.