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b380004 66760eb b380004 66760eb b380004 66760eb b380004 66760eb b380004 66760eb b380004 66760eb b380004 66760eb b380004 66760eb b380004 66760eb b380004 66760eb | 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 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 | """Module defining MCP connection scheme configurations."""
from typing import Annotated, Literal
from agno.tools.mcp import SSEClientParams, StreamableHTTPClientParams
from agno.utils.log import log_error
from mcp import StdioServerParameters
from pydantic import BaseModel, ConfigDict, Field, ValidationError
class CommandConnection(StdioServerParameters):
"""MCP connection variant using a shell command."""
name: str = Field(..., description="Name of the MCP server instance")
transport: Literal["stdio"] = Field("stdio")
class SSEConnection(BaseModel, SSEClientParams):
"""SSE connection variant using a URL endpoint."""
name: str = Field(..., description="Name of the MCP server instance")
transport: Literal["sse"] = Field("sse")
class StreamableHTTPConnection(BaseModel, StreamableHTTPClientParams):
"""MCP connection variant using a URL endpoint."""
name: str = Field(..., description="Name of the MCP server instance")
transport: Literal["streamable-http"] = Field("streamable-http")
class MCPScheme(BaseModel):
"""Model representing the MCP scheme configuration."""
model_config = ConfigDict(extra="forbid")
mcp_servers: list[
Annotated[
CommandConnection | SSEConnection | StreamableHTTPConnection,
Field(discriminator="transport"),
]
] = Field(default_factory=list)
if __name__ == "__main__":
from rich.pretty import pprint
pprint(MCPScheme.model_json_schema())
# Example instances
ok1 = MCPScheme.model_validate(
{
"mcp_servers": [
{
"name": "example_command_server",
"type": "command",
"command": "mcp-server",
"args": ["--port", "8080"],
"transport": "stdio",
},
{
"name": "example_url_server",
"type": "url",
"url": "https://example.com/mcp",
"transport": "sse",
},
],
},
)
pprint(ok1)
# This will fail: missing the required key for the selected type
try:
MCPScheme.model_validate(
{"mcp_servers": [{"type": "url", "command": "ls"}]},
)
except ValidationError as e:
log_error(f"Validation error: {e}")
# Additional validation examples can be added here if needed.
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