Tag

#migration

2 posts tagged.

Invalid http_client argument: anthropic 1.x Runs on httpx2, and Two Cases the Guard Misses (2026)

TypeError: Invalid http_client argument means the anthropic Python SDK moved to httpx2 in 1.0.0. The rename is one import. The parts nobody mentions are that the guard printing that message only exists from 1.4.0, and that it cannot see your respx or OpenTelemetry layer at all (2026).

September 12, 20268 min read202

Tutorials

cannot import name 'streamablehttp_client': The MCP SDK 2 Rename, and the Timeout It Hides (2026)

ImportError: cannot import name 'streamablehttp_client' means pip resolved MCP Python SDK 2.x against v1 client code. The rename is one underscore. The part nobody mentions is that passing your own httpx2 client silently drops the 300 second read timeout to 5 (2026).

September 11, 20268 min read714