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Troubleshooting a 409 Conflict

A 409 Conflict typically responds when an execution cleanly attempts to fundamentally process structural modifications that actively violate a fixed database condition seamlessly. In HasMCP, this heavily correlates with mapping bindings (like servers to tools, prompts, or resources) that already exist.

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Common Causes

  1. Duplicate Server-Tool Associations: Attempting to execute POST /servers/{serverId}/tools to link a tool that has already been linked.
  2. Duplicate Server-Prompt Associations: Attempting to execute POST /servers/{serverId}/prompts for an already existing prompt association.
  3. Duplicate Server-Resource Associations: Attempting to execute POST /servers/{serverId}/resources for an already existing resource association.

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Resolution Steps

  1. Check Existing Maps: Before issuing POST mapping definitions, GET the current list to confirm it hasn’t been mapped natively yet.
  2. Use Correct Tools: A 409 means the LLM or script was trying to append a capability the Server already physically holds.