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Open-source releaseMLOps, Tooling & Infrastructure1 source · Jul 14, 2026

modelcontextprotocol/python-sdk v2.0.0b2

Pre-releases are opt-in only; pip install mcp still resolves to the stable 1.x line.

MCP Python SDK
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Key points

  • Stable v2 is still targeted for 2026-07-28 alongside the spec release - keep pinning an exact version.
  • Most code needs no changes; if you pass your own httpclient into a transport, change the import to httpx2.
  • TLS verification uses the operating system trust store (via truststore) instead of certifi's bundle. SSLCERTFILE / SSLCERTDIR are honored first.
  • Loggers are renamed: httpx -> httpx2, httpcore. -> httpcore2. - update logging filters that match on those names.

Sources (1)

  • [1]modelcontextprotocol/python-sdk v2.0.0b2
    GitHub: modelcontextprotocol/python-sdk · Jul 14, 04:41 PM
    Pre-releases are opt-in only; `pip install mcp` still resolves to the stable 1.x line.
    Stable v2 is still targeted for 2026-07-28 alongside the spec release - keep pinning an exact version.

Extractive summary: sentences quoted from the sources.