Spaces:
Runtime error
Runtime error
File size: 2,060 Bytes
857a91b | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 | // Package mcp implements a minimal Model Context Protocol client over stdio.
//
// It speaks newline-delimited JSON-RPC 2.0 as used by the MCP stdio transport:
// initialize, the initialized notification, tools/list and tools/call.
package mcp
import "encoding/json"
// ProtocolVersion is the MCP protocol version advertised by the client.
const ProtocolVersion = "2024-11-05"
// request is an outgoing JSON-RPC request or notification (no id => notification).
type request struct {
JSONRPC string `json:"jsonrpc"`
ID *int `json:"id,omitempty"`
Method string `json:"method"`
Params any `json:"params,omitempty"`
}
// response is an incoming JSON-RPC message.
type response struct {
JSONRPC string `json:"jsonrpc"`
ID *int `json:"id"`
Result json.RawMessage `json:"result,omitempty"`
Error *rpcError `json:"error,omitempty"`
Method string `json:"method,omitempty"` // server-initiated requests/notifications
}
type rpcError struct {
Code int `json:"code"`
Message string `json:"message"`
}
func (e *rpcError) Error() string { return e.Message }
// clientInfo identifies this client during initialize.
type clientInfo struct {
Name string `json:"name"`
Version string `json:"version"`
}
type initializeParams struct {
ProtocolVersion string `json:"protocolVersion"`
Capabilities map[string]any `json:"capabilities"`
ClientInfo clientInfo `json:"clientInfo"`
}
// Tool is a tool advertised by an MCP server.
type Tool struct {
Name string `json:"name"`
Description string `json:"description,omitempty"`
InputSchema json.RawMessage `json:"input_schema,omitempty"`
}
// toolsListResult is the result of a tools/list call. MCP servers use
// "inputSchema" (camelCase); we map it to the public InputSchema field.
type toolsListResult struct {
Tools []struct {
Name string `json:"name"`
Description string `json:"description"`
InputSchema json.RawMessage `json:"inputSchema"`
} `json:"tools"`
}
|