Prometheus Alertmanager MCP Server

Implementation Reference

• src/index.ts:324-347 (handler)

  The handler function that implements the delete-silence tool logic. It sends a DELETE request to the Alertmanager API to delete the specified silence and returns success or error message.

      try {
        // Delete the silence
        await fetchFromAlertmanager(`silence/${silenceId}`, {
          method: 'DELETE',
        });
        
        return {
          content: [{
            type: "text",
            text: `Successfully deleted silence with ID: ${silenceId}`
          }]
        };
      } catch (error: unknown) {
        const errorMessage = error instanceof Error ? error.message : String(error);
        return {
          content: [{
            type: "text",
            text: `Error deleting silence: ${errorMessage}`
          }],
          isError: true
        };
      }
    }
  );

• src/index.ts:321-322 (schema)

  Input schema for the delete-silence tool, defining the silenceId parameter using Zod.

    silenceId: z.string().describe("ID of the silence to delete"),
  },

• src/index.ts:319-348 (registration)

  Registration of the delete-silence tool on the MCP server using server.tool(), including schema and handler.

    "delete-silence",
    {
      silenceId: z.string().describe("ID of the silence to delete"),
    },
    async ({ silenceId }) => {
      try {
        // Delete the silence
        await fetchFromAlertmanager(`silence/${silenceId}`, {
          method: 'DELETE',
        });
        
        return {
          content: [{
            type: "text",
            text: `Successfully deleted silence with ID: ${silenceId}`
          }]
        };
      } catch (error: unknown) {
        const errorMessage = error instanceof Error ? error.message : String(error);
        return {
          content: [{
            type: "text",
            text: `Error deleting silence: ${errorMessage}`
          }],
          isError: true
        };
      }
    }
  );