Switchlane Python SDK

A typed sync and async client for the Switchlane runtime routing API.

Switchlane is a decision layer for multi-agent systems, not an agent marketplace or agent-building framework. It routes each task to an eligible agent or MCP-backed service and can abstain instead of returning a weak match.

Install

pip install switchlane

Connect

from switchlane import Switchlane

client = Switchlane(
    "sl_live_...",
    base_url="http://localhost:3001",  # Your self-hosted or managed endpoint
)

The following sync examples reuse this client. Call client.close() when your application shuts down, or use Switchlane as a context manager.

Route a task

result = client.route("Review this pull request")
if result.meta.abstained:
    print("No suitable agent:", result.meta.abstention_reason)
else:
    print(result.recommendations[0])

Set routing constraints

from switchlane import RouteConstraints

result = client.route(
    "Analyze this dataset",
    constraints=RouteConstraints(
        max_cost_usd=0.05,
        max_latency_ms=2_000,
        min_quality_score=0.7,
        min_routing_confidence=0.5,
    ),
    limit=3,
)

Async client

import asyncio
from switchlane import AsyncSwitchlane

async def main() -> None:
    async with AsyncSwitchlane(
        "sl_live_...",
        base_url="http://localhost:3001",
    ) as client:
        result = await client.route("Research current browser automation tools")
        print(result.meta)

asyncio.run(main())

Route and execute

Execution is opt-in and currently supports MCP endpoints. Treat third-party agents and MCP servers as untrusted infrastructure.

result = client.execute(
    "Send the deployment result to Slack",
    {"channel": "#engineering", "message": "Deployment succeeded"},
)
print(result.execution)

Errors

from switchlane import SwitchlaneError

try:
    client.route("Example task")
except SwitchlaneError as error:
    print(error.status_code, error, error.body)

Links

• Server and documentation
• OpenAPI specification
• Issues

License

MIT © Troia Labs. The Switchlane server is licensed separately under AGPL-3.0-only.