NewYour coding agent can read the release notes before it upgrades.Set up the MCP server →
pub.dev · #3788 most downloaded on pub.dev
A Windows HTTP client for package:http using the native WinHTTP API. Provides system proxy support, Schannel TLS, and automatic decompression. Requires Windows 8.1+.
Last release today
07 Oct 2026
Ships fairly regularly
a new release about every 2 months
Nearly every release is documented
notes for 5 of 5 stable releases
Nothing withdrawn
no release was ever pulled
6 months old
5 releases · first in 2026
One column per month.
Sessions now request TLS 1.2 and TLS 1.3 explicitly (the Windows 11 default) instead of inheriting the machine-wide DefaultSecureProtocols registry va
DefaultSecureProtocols
registry value. A value of TLS 1.2 only made every handshake with a TLS
1.3-only server fail. Windows versions whose WinHTTP lacks TLS 1.3 keep the
system default.Enabled WINHTTP_OPTION_IPV6_FAST_FALLBACK (Happy Eyeballs) on the session so dual-stack hosts with an unreachable IPv6 route fall back to IPv4 within
WINHTTP_OPTION_IPV6_FAST_FALLBACK (Happy Eyeballs) on the session
so dual-stack hosts with an unreachable IPv6 route fall back to IPv4 within
milliseconds instead of stalling until the IPv6 connect times out
(Windows 10 2004+, silent fallback on older versions).Fixed async request error reporting so WinHTTP-owned callback pointers are not read after NativeCallable.listener dispatch.
NativeCallable.listener dispatch.Breaking: Migrated from sync WinHTTP + isolates to async WinHTTP callbacks. No public API changes, but internal architecture is completely different.
WinHttpCloseHandle (native cancellation).maxConnectionsPerServer to WinHttpClientConfiguration.WinHttpClient implementing package:http BaseClient via WinHTTP FFI.
WinHttpClient implementing package:http BaseClient via WinHTTP FFI.WINHTTP_ACCESS_TYPE_AUTOMATIC_PROXY).http_client_conformance_tests suite (172/172 non-skipped tests).Your coding agent can read these notes before it upgrades. Set up the MCP server →