mcp-cli
Interface for MCP (Model Context Protocol) servers via CLI. Use when you need to interact with external tools, APIs, or data sources through MCP servers.
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- philschmid/mcp-cli
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- 2026年2月5日 18:31
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- mcp-cli
- description
- Interface for MCP (Model Context Protocol) servers via CLI. Use when you need to interact with external tools, APIs, or data sources through MCP servers.
# MCP-CLI
Access MCP servers through the command line. MCP enables interaction with external systems like GitHub, filesystems, databases, and APIs.
## Commands
| Command | Output |
|---------|--------|
| `mcp-cli` | List all servers and tools |
| `mcp-cli info <server>` | Show server tools and parameters |
| `mcp-cli info <server> <tool>` | Get tool JSON schema |
| `mcp-cli grep "<pattern>"` | Search tools by name |
| `mcp-cli call <server> <tool>` | Call tool (reads JSON from stdin if no args) |
| `mcp-cli call <server> <tool> '<json>'` | Call tool with arguments |
**Both formats work:** `<server> <tool>` or `<server>/<tool>`
## Workflow
1. **Discover**: `mcp-cli` → see available servers
2. **Explore**: `mcp-cli info <server>` → see tools with parameters
3. **Inspect**: `mcp-cli info <server> <tool>` → get full JSON schema
4. **Execute**: `mcp-cli call <server> <tool> '<json>'` → run with arguments
## Examples
```bash
# List all servers
mcp-cli
# With descriptions
mcp-cli -d
# See server tools
mcp-cli info filesystem
# Get tool schema (both formats work)
mcp-cli info filesystem read_file
mcp-cli info filesystem/read_file
# Call tool
mcp-cli call filesystem read_file '{"path": "./README.md"}'
# Pipe from stdin (no '-' needed!)
cat args.json | mcp-cli call filesystem read_file
# Search for tools
mcp-cli grep "*file*"
# Output is raw text (pipe-friendly)
mcp-cli call filesystem read_file '{"path": "./file"}' | head -10
```
## Advanced Chaining
```bash
# Chain: search files → read first match
mcp-cli call filesystem search_files '{"path": ".", "pattern": "*.md"}' \
| head -1 \
| xargs -I {} mcp-cli call filesystem read_file '{"path": "{}"}'
# Loop: process multiple files
mcp-cli call filesystem list_directory '{"path": "./src"}' \
| while read f; do mcp-cli call filesystem read_file "{\"path\": \"$f\"}"; done
# Conditional: check before reading
mcp-cli call filesystem list_directory '{"path": "."}' \
| grep -q "README" \
&& mcp-cli call filesystem read_file '{"path": "./README.md"}'
# Multi-server aggregation
{
mcp-cli call github search_repositories '{"query": "mcp", "per_page": 3}'
mcp-cli call filesystem list_directory '{"path": "."}'
}
# Save to file
mcp-cli call github get_file_contents '{"owner": "x", "repo": "y", "path": "z"}' > output.txt
```
**Note:** `call` outputs raw text content directly (no jq needed for text extraction)
## Options
| Flag | Purpose |
|------|---------|
| `-d` | Include descriptions |
| `-c <path>` | Specify config file |
## Common Errors
| Wrong Command | Error | Fix |
|---------------|-------|-----|
| `mcp-cli server tool` | AMBIGUOUS_COMMAND | Use `call server tool` or `info server tool` |
| `mcp-cli run server tool` | UNKNOWN_SUBCOMMAND | Use `call` instead of `run` |
| `mcp-cli list` | UNKNOWN_SUBCOMMAND | Use `info` instead of `list` |
| `mcp-cli call server` | MISSING_ARGUMENT | Add tool name |
| `mcp-cli call server tool {bad}` | INVALID_JSON | Use valid JSON with quotes |
## Exit Codes
- `0`: Success
- `1`: Client error (bad args, missing config)
- `2`: Server error (tool failed)
- `3`: Network error
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