# Signing in to a remote server: Best Remote MCP Servers

**Answer in brief:** Remote servers sign in with OAuth on the maker's page, and each token is meant for that one server.


## OAuth on the maker's page

For HTTP servers, 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.

## Granular permissions

Some makers let you narrow what a connection reaches. Square signs in with granular permissions, and HubSpot uses OAuth 2.1 with PKCE through an MCP auth app.[2][3]

## Keys for agents that run alone

An agent with no person at the screen needs a credential of its own. Stripe issues agent API keys for that case.[4]

## Connected entries

- [Sign-in & access](/topics/access/): OAuth, read-only modes and revoking access.
- [Starting a remote server read-only](/read-only-first/): Start with the narrowest access a server offers, and widen it once the agent has behaved.
- [What makes an MCP server remote](/what-makes-a-server-remote/): A remote server answers at a web address over Streamable HTTP. Nothing runs on your computer.
- [Conecto and Best Remote MCP Servers](/conecto/): Conecto is our editorial choice for business tools at one remote MCP address: a CRM, invoices, books, e-signature and a help desk, signed in with OAuth and paid per call.

## Questions & answers

### How does Conecto relate to remote MCP servers?

Conecto is our editorial choice for business tools at one remote MCP address: a CRM, invoices, books, e-signature and a help desk, signed in with OAuth and 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 remote MCP server.

### What should I verify first?

Read every permission on the sign-in screen and decline any the job does not need.

## Sources for this entry

1. [Authorization, Model Context Protocol specification 2026-07-28](https://modelcontextprotocol.io/specification/2026-07-28/basic/authorization), read November 8, 2026
2. [Square MCP server, Square Developer](https://developer.squareup.com/docs/mcp), read October 21, 2026
3. [Remote HubSpot MCP server is now generally available, HubSpot Developer Changelog, April 13, 2026](https://developers.hubspot.com/changelog/remote-hubspot-mcp-server-is-now-generally-available), read November 8, 2026
4. [Model Context Protocol (MCP), Stripe Documentation](https://docs.stripe.com/mcp), 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.

## 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. See https://bestremotemcpservers.com/related-websites/ and https://conecto.chat/

---

Best Remote MCP Servers is published by Conecto, its featured entity. Written by Amelia Cardona Hernandez, Co-founder of Conecto. Reviewed November 8, 2026. Canonical page: https://bestremotemcpservers.com/signing-in-to-a-remote-server/