| Filename | Latest commit message | Latest commit date |
|---|---|---|
e0b9c1a26fOne handler asks the user something on any revision now. Where the client can be asked mid-request it still is; where it cannot, the ask becomes the input_required result that revision carries and the same call returns the answer once the client re-sends it. Costs one handler entry per ask, so side effects belong after the last question. Answers from earlier rounds travel in the requestState, which is why asking more than once needs Builder::setRequestState(). sample() and listRoots() still raise a LogicException there: that revision removed them outright. |
||
| .. | ||
| cached-discovery | ||
| client-communication | ||
| client-logging | ||
| combined-registration | ||
| complex-tool-schema | ||
| custom-dependencies | ||
| custom-method-handlers | ||
| discovery-calculator | ||
| discovery-userprofile | ||
| elicitation | ||
| env-variables | ||
| explicit-registration | ||
| mcp-apps | ||
| oauth-keycloak | ||
| oauth-microsoft | ||
| schema-showcase | ||
| stateless-lifecycle | ||
| bootstrap.php | ||
| README.md | ||
MCP SDK Examples
This directory contains various examples of how to use the PHP MCP SDK.
You can run the examples with the dependencies already installed in the root directory of the SDK. The bootstrapping of the example will choose the used transport based on the SAPI you use.
For running an example, you execute the server.php like this:
# For using the STDIO transport:
php examples/server/discovery-calculator/server.php
# For using the Streamable HTTP transport:
php -S localhost:8000 examples/server/discovery-userprofile/server.php
You will see debug outputs to help you understand what is happening.
Run with Inspector:
npx @modelcontextprotocol/inspector php examples/server/discovery-calculator/server.php
The 2026-07-28 lifecycle
stateless-lifecycle/server.php demonstrates protocol revision 2026-07-28, which removed the
initialize handshake and protocol-level sessions. Like every example it answers both eras — the
Inspector's initialize still works — but the interesting part is the modern one:
php -S 127.0.0.1:8000 examples/server/stateless-lifecycle/server.php
Every request carries its own protocol version and client capabilities, so a call is a single POST with no handshake before it:
curl -sS http://127.0.0.1:8000/ \
-H 'Content-Type: application/json' \
-H 'Accept: application/json, text/event-stream' \
-H 'MCP-Protocol-Version: 2026-07-28' \
-H 'Mcp-Method: server/discover' \
-d '{"jsonrpc":"2.0","id":1,"method":"server/discover","params":{"_meta":{
"io.modelcontextprotocol/protocolVersion":"2026-07-28",
"io.modelcontextprotocol/clientCapabilities":{}}}}'
tests/Integration/StatelessLifecycleTest.php drives this example end to end — discovery, a tool call,
the multi round-trip flow, and the response stream carrying progress and log notifications.
Debugging
You can enable debug output by setting the DEBUG environment variable to 1, and additionally log to a file by
setting the FILE_LOG environment variable to 1 as well. A dev.log file gets written within the example's
directory.
With the Inspector you can set the environment variables like this:
npx @modelcontextprotocol/inspector -e DEBUG=1 -e FILE_LOG=1 php examples/server/discovery-calculator/server.php