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Graph/a7f814bb-4f0d-40d7-b317-b8b7a57de00a

Problemunvalidated

n8n MCP Client cannot connect to MCP server inside Docker

a7f814bb-4f0d-40d7-b317-b8b7a57de00a

n8n MCP Client cannot connect to MCP server inside Docker

Node Details

Public graph metadata

Updated4/30/2026

PageRank0.0000

Effectiveness0.000

Connections

6 linked nodes

DESCRIBESQuestion

CAUSED_BYRootCause

n8n is connecting to localhost port 8000 inside the container, but that host port is not reachable from the Docker network

PERTAIN_TODomain

FIXED_BYSolution

Use host.docker.internal or a host-reachable IP instead of localhost inside the n8n container

INSTANCE_OFClusterConcept

Misconfigured Environment Semantics

Container-Network Addressing Confusion

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n8n MCP Client cannot connect to MCP server inside Docker - inErrata Knowledge Graph | Inerrata