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feat: Introduce in-process channel transport for zero-overhead MCP communication, including new TransportType::Channel and channel feature, and bump all crates to v3.0.1.
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‎CHANGELOG.md‎

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@@ -7,6 +7,19 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
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## [Unreleased]
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## [3.0.1] - 2026-03-05
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### Added
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- **In-process channel transport** - Zero-overhead `channel` transport using `tokio::sync::mpsc` channels for same-process MCP communication. Eliminates line framing, flushing, and redundant JSON parsing. 1.4x faster than rmcp on tool call latency (14μs vs 19μs), 1.2x higher throughput (71k rps vs 59k rps).
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- **`TransportType::Channel` variant** - Added `Channel` to both `turbomcp-core` and `turbomcp-transport-traits` `TransportType` enums, with `is_local()` classification and proper `Display`/serde support.
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- **`RequestContext::channel()` factory** - Convenience constructor for channel transport contexts in `turbomcp-server`.
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- **`channel` feature flag** - New feature on `turbomcp-server` and `turbomcp` crates, included in `all-transports` bundle.
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### Fixed
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- **Channel transport type identification** - `ChannelTransport::transport_type()` now correctly returns `TransportType::Channel` instead of `TransportType::Stdio`.
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## [3.0.0] - 2026-03-03
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### Added

‎Cargo.toml‎

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#
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# All other crates either have empty defaults (removed vestigial `default-features = false`)
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# or useful defaults that should be enabled by default.
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turbomcp = { version = "3.0.0", path = "crates/turbomcp" }
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turbomcp = { version = "3.0.1", path = "crates/turbomcp" }
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# v3.0: turbomcp-types is THE source of truth for all MCP types
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turbomcp-types = { version = "3.0.0", path = "crates/turbomcp-types" }
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turbomcp-types = { version = "3.0.1", path = "crates/turbomcp-types" }
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# v3.0: turbomcp-core re-extracted as no_std foundation layer
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turbomcp-core = { version = "3.0.0", path = "crates/turbomcp-core", default-features = false }
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turbomcp-core = { version = "3.0.1", path = "crates/turbomcp-core", default-features = false }
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# v3.0: turbomcp-transport-traits lean transport traits crate
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turbomcp-transport-traits = { version = "3.0.0", path = "crates/turbomcp-transport-traits" }
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turbomcp-transport-traits = { version = "3.0.1", path = "crates/turbomcp-transport-traits" }
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# v3.0: Individual transport crates (extracted from monolithic turbomcp-transport)
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turbomcp-stdio = { version = "3.0.0", path = "crates/turbomcp-stdio" }
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turbomcp-http = { version = "3.0.0", path = "crates/turbomcp-http" }
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turbomcp-websocket = { version = "3.0.0", path = "crates/turbomcp-websocket" }
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turbomcp-tcp = { version = "3.0.0", path = "crates/turbomcp-tcp" }
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turbomcp-unix = { version = "3.0.0", path = "crates/turbomcp-unix" }
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turbomcp-protocol = { version = "3.0.0", path = "crates/turbomcp-protocol" }
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turbomcp-transport = { version = "3.0.0", path = "crates/turbomcp-transport", default-features = false }
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turbomcp-client = { version = "3.0.0", path = "crates/turbomcp-client" }
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turbomcp-server = { version = "3.0.0", path = "crates/turbomcp-server" }
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turbomcp-macros = { version = "3.0.0", path = "crates/turbomcp-macros" }
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turbomcp-cli = { version = "3.0.0", path = "crates/turbomcp-cli" }
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turbomcp-telemetry = { version = "3.0.0", path = "crates/turbomcp-telemetry" }
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turbomcp-auth = { version = "3.0.0", path = "crates/turbomcp-auth" }
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turbomcp-dpop = { version = "3.0.0", path = "crates/turbomcp-dpop" }
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turbomcp-proxy = { version = "3.0.0", path = "crates/turbomcp-proxy" }
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turbomcp-grpc = { version = "3.0.0", path = "crates/turbomcp-grpc" }
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turbomcp-openapi = { version = "3.0.0", path = "crates/turbomcp-openapi" }
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turbomcp-wire = { version = "3.0.0", path = "crates/turbomcp-wire", default-features = false }
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turbomcp-wasm = { version = "3.0.0", path = "crates/turbomcp-wasm" }
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turbomcp-wasm-macros = { version = "3.0.0", path = "crates/turbomcp-wasm-macros" }
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turbomcp-transport-streamable = { version = "3.0.0", path = "crates/turbomcp-transport-streamable", default-features = false }
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turbomcp-stdio = { version = "3.0.1", path = "crates/turbomcp-stdio" }
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turbomcp-http = { version = "3.0.1", path = "crates/turbomcp-http" }
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turbomcp-websocket = { version = "3.0.1", path = "crates/turbomcp-websocket" }
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turbomcp-tcp = { version = "3.0.1", path = "crates/turbomcp-tcp" }
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turbomcp-unix = { version = "3.0.1", path = "crates/turbomcp-unix" }
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turbomcp-protocol = { version = "3.0.1", path = "crates/turbomcp-protocol" }
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turbomcp-transport = { version = "3.0.1", path = "crates/turbomcp-transport", default-features = false }
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turbomcp-client = { version = "3.0.1", path = "crates/turbomcp-client" }
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turbomcp-server = { version = "3.0.1", path = "crates/turbomcp-server" }
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turbomcp-macros = { version = "3.0.1", path = "crates/turbomcp-macros" }
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turbomcp-cli = { version = "3.0.1", path = "crates/turbomcp-cli" }
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turbomcp-telemetry = { version = "3.0.1", path = "crates/turbomcp-telemetry" }
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turbomcp-auth = { version = "3.0.1", path = "crates/turbomcp-auth" }
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turbomcp-dpop = { version = "3.0.1", path = "crates/turbomcp-dpop" }
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turbomcp-proxy = { version = "3.0.1", path = "crates/turbomcp-proxy" }
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turbomcp-grpc = { version = "3.0.1", path = "crates/turbomcp-grpc" }
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turbomcp-openapi = { version = "3.0.1", path = "crates/turbomcp-openapi" }
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turbomcp-wire = { version = "3.0.1", path = "crates/turbomcp-wire", default-features = false }
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turbomcp-wasm = { version = "3.0.1", path = "crates/turbomcp-wasm" }
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turbomcp-wasm-macros = { version = "3.0.1", path = "crates/turbomcp-wasm-macros" }
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turbomcp-transport-streamable = { version = "3.0.1", path = "crates/turbomcp-transport-streamable", default-features = false }
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[profile.dev]
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opt-level = 1

‎crates/turbomcp-auth/Cargo.toml‎

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[package]
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name = "turbomcp-auth"
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version = "3.0.0"
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version = "3.0.1"
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edition = "2024"
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authors = ["Nicholas Paterno <nick@epistates.com>"]

‎crates/turbomcp-cli/Cargo.toml‎

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[package]
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name = "turbomcp-cli"
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version = "3.0.0"
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version = "3.0.1"
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edition = "2024"
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authors = ["Nicholas Paterno <nick@epistates.com>"]

‎crates/turbomcp-client/Cargo.toml‎

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[package]
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name = "turbomcp-client"
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version = "3.0.0"
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version = "3.0.1"
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edition = "2024"
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authors = ["Nicholas Paterno <nick@epistates.com>"]

‎crates/turbomcp-core/Cargo.toml‎

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[package]
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name = "turbomcp-core"
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version = "3.0.0"
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version = "3.0.1"
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edition = "2024"
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authors = ["Nicholas Paterno <nick@epistates.com>"]
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description = "Core MCP types and primitives - no_std compatible for WASM targets"

‎crates/turbomcp-dpop/Cargo.toml‎

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[package]
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name = "turbomcp-dpop"
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version = "3.0.0"
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version = "3.0.1"
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edition = "2024"
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authors = ["Nicholas Paterno <nick@epistates.com>"]

‎crates/turbomcp-grpc/Cargo.toml‎

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[package]
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name = "turbomcp-grpc"
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version = "3.0.0"
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version = "3.0.1"
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edition = "2024"
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authors = ["Nicholas Paterno <nick@epistates.com>"]
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description = "gRPC transport for TurboMCP - high-performance MCP over HTTP/2"
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# Internal dependencies
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turbomcp-core = { version = "3.0.0", path = "../turbomcp-core", default-features = false, features = ["std"] }
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turbomcp-protocol = { version = "3.0.0", path = "../turbomcp-protocol", default-features = false }
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turbomcp-transport-traits = { version = "3.0.0", path = "../turbomcp-transport-traits", default-features = false }
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turbomcp-core = { version = "3.0.1", path = "../turbomcp-core", default-features = false, features = ["std"] }
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turbomcp-protocol = { version = "3.0.1", path = "../turbomcp-protocol", default-features = false }
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turbomcp-transport-traits = { version = "3.0.1", path = "../turbomcp-transport-traits", default-features = false }
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# Tower integration
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tower = { workspace = true }

‎crates/turbomcp-http/Cargo.toml‎

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[package]
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name = "turbomcp-http"
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version = "3.0.0"
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version = "3.0.1"
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edition = "2024"
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authors = ["Nicholas Paterno <nick@epistates.com>"]
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description = "HTTP/SSE transport implementation for MCP (Model Context Protocol) - Client transport"

‎crates/turbomcp-macros/Cargo.toml‎

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[package]
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name = "turbomcp-macros"
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version = "3.0.0"
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version = "3.0.1"
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edition = "2024"
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description = "Procedural macros for ergonomic MCP tool and resource registration"
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license = "MIT"
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axum = { workspace = true, optional = true }
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tokio = { workspace = true, optional = true }
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turbomcp-protocol = { version = "3.0.0", path = "../turbomcp-protocol" }
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turbomcp-transport = { version = "3.0.0", path = "../turbomcp-transport", optional = true }
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turbomcp-protocol = { version = "3.0.1", path = "../turbomcp-protocol" }
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turbomcp-transport = { version = "3.0.1", path = "../turbomcp-transport", optional = true }
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[dev-dependencies]
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trybuild = "1.0"

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