Testing a server before you trust it: Top MCP Servers

Answer in brief

Look at a server's tools in the MCP Inspector, mark every tool that writes, and keep approvals on.

Open it in the Inspector

The MCP Inspector is the reference tool for testing and debugging MCP servers. Run npx @modelcontextprotocol/inspector and connect the server to see every tool it offers before an agent does.¹

Read the tool list yourself

Tool descriptions and annotations tell a client what each tool does. The specification tells clients to treat annotations as untrusted unless the server is trusted.² Read the descriptions and mark each tool that changes, sends or deletes something.

Keep a person in the loop

The specification says a person should always be able to deny a tool call.² Leave your client's approval prompt on for the tools you marked until the server has a track record.

Connected entries

Testing & costChecking a server before trusting it, and what it costs.Explore entry What an MCP server costs to runThe protocol is free. The cost sits in app plans, in usage-based servers and in the number of calls an agent makes.Explore entry Picking one MCP server per jobMatch each job to the server its app's maker publishes, and keep the list short.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?

Connect the server in the Inspector, list its tools, and mark each one that writes, sends or deletes before any agent uses it.

Sources for this entry

MCP Inspector, Model Context Protocol documentation, read November 8, 2026
Tools, Model Context Protocol specification 2026-07-28, 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. "Testing a server before you trust it: Top MCP Servers." Published by Conecto. Reviewed November 8, 2026. https://topmcpservers.com/testing-a-server/