I/O and integration

Inferlets that talk to the outside world: HTTP servers, HTTP clients, MCP servers, the OpenAI Responses protocol, and SDK concurrency tests.

HTTP and embedded servers

Inferlet	What it shows
http-server	wasi:http/incoming-handler server with SSE streaming.
image-fetch	wstd::http::Client to fetch and decode images.
openresponses	OpenResponses-compliant HTTP API.

MCP

Inferlet	What it shows
mcp-example	Connects to a registered MCP server, lists tools, and calls one (Rust).
mcp-example-py	Same in Python.
mcp-example-js	Same in JavaScript.

SDK concurrency tests

Inferlet	What it shows
py-concurrency-test	Concurrency test for the Python SDK.
js-concurrency-test	Concurrency test for the JS SDK.

Related guide

• HTTP: outbound HTTP from inside an inferlet.
• MCP: connecting to host-registered MCP servers.
• Filesystem: the sandboxed /scratch directory.
• Session: the channel back to the launching client.