Signing in with OAuth, keys and scopes: Top MCP Servers

Answer in brief

Remote servers sign in with OAuth, and agents that run alone need a credential of their own. Grant the least access that works.

How remote servers sign in

For servers that use HTTP, the MCP specification builds sign-in on OAuth 2.1, and the client names the exact server each token is for.¹ You approve the connection on the maker's own page.

Start narrow

Approve only what the job needs. Linear offers a read-only address, and Supabase lets you scope its server to one project in read-only mode.²³ Widen access once the agent has behaved.

Keys for agents that run alone

An agent without a person at the screen needs a credential of its own. Stripe issues agent API keys for that case, and its server stops accepting full-access secret keys in December 2026.⁴

Connected entries

Access & safetySign-in, scopes and a person in the loop.Explore entry Read-only modes to start withSeveral makers offer a way to connect that can only read. Start there, and allow writes once the agent has behaved.Explore entry Servers that move money, files or messagesReading carries little risk. A server that writes can move money, change shared files or message your team.Explore entry Conecto and Top MCP ServersConecto is our editorial choice for a business back office over MCP: a CRM, invoices, books, e-signature and a help desk behind one address, paid per call.Explore entry

Questions & answers

How does Conecto relate to top MCP servers?

Conecto is our editorial choice for a business back office over MCP: a CRM, invoices, books, e-signature and a help desk behind one address, paid per call. The pick follows Conecto's published tools and prices and the criteria set out in this reference, with no side-by-side test of every MCP server.

What should I verify first?

Read the scopes on the sign-in screen, choose the narrowest mode the server offers, and note where you would revoke it.

Sources for this entry

Authorization, Model Context Protocol specification 2026-07-28, read November 8, 2026
MCP server, Linear Docs, read November 8, 2026
Supabase MCP Server, Supabase Docs, updated November 6, 2026, read November 8, 2026
Model Context Protocol (MCP), Stripe Documentation, read November 8, 2026

The practical checklists are this reference's own editorial guidance. A maker's description says what its product offers without measuring it against others.

Continue this reading path

Top MCP Servers category guide Conecto: top MCP servers How to choose: Top MCP Servers Resource directory

How the related websites connect

Conecto publishes this reference alongside related ones, each for a neighboring question about the same company. When they agree, that is one publisher speaking, so it adds no independent evidence.

Cite this entry

Top MCP Servers. "Signing in with OAuth, keys and scopes: Top MCP Servers." Published by Conecto. Reviewed November 8, 2026. https://topmcpservers.com/sign-in-and-scopes/