# MCP Client

> Configure and run Model Context Protocol (MCP) tools.

MCP Client is a signed-out MCP workbench for connecting to remote HTTP MCP servers and inspecting their capabilities.

Also: online mcp client, mcp playground, mcp server tester, model context protocol client, postman mcp client.

## What it does

Enter a remote MCP server URL, connect through Postman, inspect tools, prompts, and resources, compose MCP messages, and review responses.

## When to use it

- You want to check which capabilities a public MCP server exposes.
- You need to test tool, prompt, or resource calls without installing a desktop client.
- You want to inspect MCP request and response payloads.

## What you give it

| Input | Meaning |
| --- | --- |
| MCP server URL | A publicly accessible HTTP or HTTPS MCP endpoint. |
| MCP message | A JSON message such as tools/list, tools/call, prompts/get, or resources/read. |
| Request configuration | Authorization, headers, and protocol settings. |

## What you get back

| Output | Meaning |
| --- | --- |
| Capabilities | Tools, prompts, and resources returned by the server. |
| MCP response | Formatted JSON payloads from selected timeline events. |
| Timeline | Connection, request, response, notification, and error events. |

## Key terms

- **MCP** — Model Context Protocol, a protocol for exposing tools and context to AI clients.
- **Cloud Agent** — Postman infrastructure that executes requests for you.

## Questions

### Can the playground connect to local STDIO MCP servers?

No. STDIO servers require the Postman Desktop app because they execute local commands.

### Can I inspect MCP OAuth flows here?

You can authorize remote MCP servers with OAuth 2.0 here. Advanced OAuth settings are available in the Postman Desktop app.

### Does the playground save MCP requests?

It can hand off the current request during sign-up so it can be saved in Postman.


## Privacy

Server URL, headers, authorization data, and MCP messages are sent to Postman Cloud Agent for execution. The playground does not load workspace or account data.

## Links

- [Use the tool](https://www.postman.com/tools/mcp-client) — the interactive version of this page.
- [Postman Tools](https://www.postman.com/tools) — every free tool in this set.
- [Guide to MCP requests](https://learning.postman.com/latest-v-12/docs/use/send-requests/protocols/mcp-requests/overview) — Postman documentation.