Build Your First MCP Server

Stand up a working MCP server exposing your own tools, connect a client, and validate the full call loop.

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Chain

Inputs

Step 1

flow-build-first-mcp-server-1-choose-tools-worth-exposing-and-set-up-the-sdk

Step 2

flow-build-first-mcp-server-2-implement-the-server-and-tools

Step 3

flow-build-first-mcp-server-3-connect-a-host-and-verify-discovery

Step 4

flow-build-first-mcp-server-4-test-errors-and-edge-behavior-through-the-protocol

Final output

No inputs required — hit Run to stream each step in order.

Each step streams from its model and feeds the next. BYOK — you pay your provider directly. Add a key in Settings if a step needs one.

Step 1 · A first server succeeds by doing few things properly.

flow-build-first-mcp-server-1-choose-tools-worth-exposing-and-set-up-the-sdk

Claude Sonnet 4.6→ {{step_1}}

Awaiting upstream steps…

Step 2 · Register, validate, execute, respond - the whole job.

flow-build-first-mcp-server-2-implement-the-server-and-tools

Claude Sonnet 4.6→ {{step_2}}

Awaiting upstream steps…

Step 3 · The protocol is only real once a host you did not write speaks it.

flow-build-first-mcp-server-3-connect-a-host-and-verify-discovery

Claude Sonnet 4.6→ {{step_3}}

Awaiting upstream steps…

Step 4 · Error paths are where integrations actually break.

flow-build-first-mcp-server-4-test-errors-and-edge-behavior-through-the-protocol

Claude Sonnet 4.6→ {{step_4}}

Awaiting upstream steps…

Stand up a working MCP server exposing your own tools, connect a client, and validate the full call loop.

1
A first server succeeds by doing few things properly.
Runs flow-build-first-mcp-server-1-choose-tools-worth-exposing-and-set-up-the-sdk on Claude Sonnet 4.6
2
Register, validate, execute, respond - the whole job.
Runs flow-build-first-mcp-server-2-implement-the-server-and-tools on Claude Sonnet 4.6
3
The protocol is only real once a host you did not write speaks it.
Runs flow-build-first-mcp-server-3-connect-a-host-and-verify-discovery on Claude Sonnet 4.6
4
Error paths are where integrations actually break.
Runs flow-build-first-mcp-server-4-test-errors-and-edge-behavior-through-the-protocol on Claude Sonnet 4.6

•Recurring tasks you currently copy-paste between tools.
•When a single prompt isn't enough — you need a chain where output(n) feeds prompt(n+1).
•Fork and adapt if your inputs differ materially from the author's use case.

Claude Sonnet 4.6