Agent skill
05-20-mcp-less
Use MCP without installing
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/other/other/05-20-mcp-less
SKILL.md
MCP-Less / Code-mode
Talk to ANY MCP directly (no client integration required)
You can call MCP servers directly from CLI/code with bunx — no Pi/Claude/Cursor connector setup required. Or write scripts/code for this flow.
Method 1: Direct calls with MCP Inspector CLI
Use @modelcontextprotocol/inspector in CLI mode.
A) Remote Streamable HTTP MCP
# List tools
bunx --yes @modelcontextprotocol/inspector \
--cli https://your-mcp-server.example.com/mcp \
--transport http \
--method tools/list
# Call tool (no args)
bunx --yes @modelcontextprotocol/inspector \
--cli https://your-mcp-server.example.com/mcp \
--transport http \
--method tools/call \
--tool-name health_check
# Call tool (with args)
bunx --yes @modelcontextprotocol/inspector \
--cli https://your-mcp-server.example.com/mcp \
--transport http \
--method tools/call \
--tool-name my_tool \
--tool-arg 'query=hello world' \
--tool-arg 'limit=10'
B) Remote SSE MCP
bunx --yes @modelcontextprotocol/inspector \
--cli https://your-mcp-server.example.com/sse \
--transport sse \
--method tools/list
C) Local stdio MCP process
# Example: node server
bunx --yes @modelcontextprotocol/inspector \
--cli node ./dist/index.js \
--method tools/list
Method 2: Bridge remote MCP to stdio clients (optional)
If a client only supports stdio servers, proxy a remote MCP via mcp-remote:
bunx --yes mcp-remote https://your-mcp-server.example.com/mcp --transport http-first
This runs a local stdio proxy connected to the remote MCP server.
Auth headers (when needed)
For token-protected HTTP/SSE servers:
bunx --yes @modelcontextprotocol/inspector \
--cli https://your-mcp-server.example.com/mcp \
--transport http \
--header "Authorization: Bearer $TOKEN" \
--method tools/list
Practical workflow for agents
tools/list- Optional capability/discovery tool (often
read_me,help, ordescribe) tools/callwith minimal valid args- Iterate using server errors/schema hints
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