modelcontextprotocol/go-sdk
Watch
1
0
Fork
You've already forked go-sdk
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions 1

docs: document stateless mode and custom transports (#485)

Browse source
This commit is contained in:
Robert Findley 2025-09-18 11:22:40 -04:00 • committed by GitHub
commit f5cee0aa32
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
2 changed files with 52 additions and 12 deletions
Download patch file Download diff file Expand all files Collapse all files

28
docs/protocol.md
View file

@ -182,15 +182,35 @@ the server using the streamable transport protocol.
#### Stateless Mode #### Stateless Mode
<!-- TODO --> The streamable server supports a _stateless mode_ by setting
[`StreamableHTTPOptions.Stateless`](https://pkg.go.dev/github.com/modelcontextprotocol/go-sdk/mcp#StreamableHTTPOptions.Stateless),
which is where the server does not perform any validation of the session id,
and uses a temporary session to handle requests. In this mode, it is impossible
for the server to make client requests, as there is no way for the client's
response to reach the session.
#### Sessionless mode However, it is still possible for the server to access the `ServerSession.ID`
to see the logical session
<!-- TODO --> > [!WARNING]
> Stateless mode is not directly discussed in the spec, and is still being
> defined. See modelcontextprotocol/modelcontextprotocol#1364,
> modelcontextprotocol/modelcontextprotocol#1372, or
> modelcontextprotocol/modelcontextprotocol#11442 for potential refinements.
_See [examples/server/distributed](../examples/server/distributed/main.go) for
an example using statless mode to implement a server distributed across
multiple processes._
### Custom transports ### Custom transports
<!-- TODO --> The SDK supports [custom
transports](https://modelcontextprotocol.io/specification/2025-06-18/basic/transports#custom-transports)
by implementing the
[`Transport`](https://pkg.go.dev/github.com/modelcontextprotocol/go-sdk/mcp#Transport)
interface: a logical bidirectional stream of JSON-RPC messages.
_Full example: [examples/server/custom-transport](../examples/server/custom-transport/main.go)._
### Concurrency ### Concurrency

28
internal/docs/protocol.src.md
View file

@ -114,15 +114,35 @@ the server using the streamable transport protocol.
#### Stateless Mode #### Stateless Mode
<!-- TODO --> The streamable server supports a _stateless mode_ by setting
[`StreamableHTTPOptions.Stateless`](https://pkg.go.dev/github.com/modelcontextprotocol/go-sdk/mcp#StreamableHTTPOptions.Stateless),
which is where the server does not perform any validation of the session id,
and uses a temporary session to handle requests. In this mode, it is impossible
for the server to make client requests, as there is no way for the client's
response to reach the session.
#### Sessionless mode However, it is still possible for the server to access the `ServerSession.ID`
to see the logical session
<!-- TODO --> > [!WARNING]
> Stateless mode is not directly discussed in the spec, and is still being
> defined. See modelcontextprotocol/modelcontextprotocol#1364,
> modelcontextprotocol/modelcontextprotocol#1372, or
> modelcontextprotocol/modelcontextprotocol#11442 for potential refinements.
_See [examples/server/distributed](../examples/server/distributed/main.go) for
an example using statless mode to implement a server distributed across
multiple processes._
### Custom transports ### Custom transports
<!-- TODO --> The SDK supports [custom
transports](https://modelcontextprotocol.io/specification/2025-06-18/basic/transports#custom-transports)
by implementing the
[`Transport`](https://pkg.go.dev/github.com/modelcontextprotocol/go-sdk/mcp#Transport)
interface: a logical bidirectional stream of JSON-RPC messages.
_Full example: [examples/server/custom-transport](../examples/server/custom-transport/main.go)._
### Concurrency ### Concurrency