Add a new node to the diagram. Returns the assigned node id — save it to use in add_edge calls. If no id is provided, it is auto-generated by lowercasing the label and replacing spaces with hyphens (e.g. 'API Gateway' → 'api-gateway'). Call this before add_edge — edges require existing node ids. Choose nodeType based on the technology: use 'database' for SQL/NoSQL stores (Postgres, MongoDB), 'cache' for in-memory stores (Redis, Memcached), 'queue' for message brokers (RabbitMQ, Kafka), 'api' for API gateways or reverse proxies, 'client' for end users or frontends, 'service' for everything else.
Webmcp Flow source site7 tools on this site
What this tool does
Add a new node to the diagram. Returns the assigned node id — save it to use in add_edge calls. If no id is provided, it is auto-generated by lowercasing the label and replacing spaces with hyphens (e.g. 'API Gateway' → 'api-gateway'). Call this before add_edge — edges require existing node ids. Choose nodeType based on the technology: use 'database' for SQL/NoSQL stores (Postgres, MongoDB), 'cache' for in-memory stores (Redis, Memcached), 'queue' for message brokers (RabbitMQ, Kafka), 'api' for API gateways or reverse proxies, 'client' for end users or frontends, 'service' for everything else. Use it on Webmcp Flow with an agent. It runs in the browser on the website and needs no package install.
How to install
Open the webmcp-flow website and ask your browser agent to use add_node
Run with an agent
Use the add_node tool on webmcp-flow with label: <string>, nodeType: <string>, id: <string>. Return the structured result and cite the source page.
Input contract
labelstringHuman-readable display name shown on the node, e.g. 'Auth Service'
idstringOptional stable identifier used in add_edge. If omitted, auto-derived from label (lowercase, spaces → hyphens). Provide explicitly when the label contains special characters or you need a predictable id.
Verify the live listing at the source before a production call. Fields marked as a starter contract may differ from what the site expects.